ALLOY 713LC ROUND BAR MANUFACTURING: COMPLETE GLOBAL GUIDE TO IN 713 LC, INCONEL 713LC, AMS 5377, SPECIFICATIONS, APPLICATIONS, MACHINING & INTERNATIONAL TRADE NAMES TITLE: ALLOY 713LC ROUND BAR MANUFACTURING | IN 713 LC / INCONEL 713LC SPECIFICATION, PROPERTIES & GLOBAL SUPPLIER GUIDE META DESCRIPTION: DISCOVER ALLOY 713LC ROUND BAR MANUFACTURING, IN 713 LC CHEMISTRY, AMS 5377 SPECIFICATION, INTERNATIONAL EQUIVALENTS, TRADE NAMES, TURBINE APPLICATIONS, CASTING, MACHINING, INSPECTION, HEAT-TREATMENT CONSIDERATIONS AND GLOBAL TERMINOLOGY. PRIMARY KEYWORDS: ALLOY 713LC ROUND BAR, INCONEL 713LC ROUND BAR, IN 713LC ROUND BAR, 713LC ROUND BAR, ALLOY 713LC, IN-713LC, NICKEL ALLOY ROUND BAR, NICKEL SUPERALLOY ROUND BAR, HIGH TEMPERATURE NICKEL ALLOY, TURBINE ALLOY, GAS TURBINE ALLOY, AEROSPACE NICKEL ALLOY, INVESTMENT CASTING ALLOY, 713LC MATERIAL, 713LC SPECIFICATION, 713LC COMPOSITION, 713LC PROPERTIES, AMS 5377, NICKEL ALLOY MANUFACTURER, NICKEL ALLOY SUPPLIER, NICKEL ALLOY EXPORTER. IMPORTANT TERMINOLOGY NOTE: THE EXPRESSIONS “INCONEL 713LC, ” “IN 713LC, ” “ALLOY 713LC, ” AND “713LC” ARE ENCOUNTERED IN COMMERCIAL AND TECHNICAL LITERATURE, BUT IN 713LC IS FUNDAMENTALLY A CAST NICKEL-BASE SUPERALLOY RATHER THAN A CONVENTIONAL WROUGHT BAR GRADE. THE CURRENT SAE SPECIFICATION IDENTIFIED FOR IT, AMS 5377H, COVERS VACUUM-CAST INVESTMENT CASTINGS. THEREFORE, A PRODUCT MARKETED AS “713LC ROUND BAR” SHOULD HAVE ITS ACTUAL MANUFACTURING ROUTE AND CERTIFICATION CLEARLY STATED RATHER THAN AUTOMATICALLY BEING DESCRIBED AS AN ASTM/ASME WROUGHT ROUND BAR. ALLOY 713LC ROUND BAR MANUFACTURING INTRODUCTION TO ALLOY 713LC ALLOY 713LC, ALSO WRITTEN IN 713 LC, IN-713LC, 713 LC, 713LC AND INCONEL 713LC, IS A LOW-CARBON, NICKEL-BASE, PRECIPITATION-STRENGTHENED SUPERALLOY DEVELOPED FOR DEMANDING HIGH-TEMPERATURE SERVICE. THE ALLOY IS PARTICULARLY ASSOCIATED WITH GAS-TURBINE COMPONENTS, TURBINE BLADES, VANES, INTEGRAL TURBINE WHEELS AND OTHER HOT-SECTION COMPONENTS WHERE ELEVATED-TEMPERATURE STRENGTH, CREEP RESISTANCE, THERMAL-FATIGUE RESISTANCE AND CASTING CAPABILITY ARE IMPORTANT. ASM'S ALLOY DIGEST DESCRIBES ALLOY 713LC AS A HIGH-TEMPERATURE NICKEL ALLOY WITH STRONG STRESS-RUPTURE CAPABILITY AND THERMAL-FATIGUE RESISTANCE, PARTICULARLY FOR TURBINE-WHEEL APPLICATIONS. MODERN TECHNICAL LITERATURE ALSO DESCRIBES IN-713LC AS AN INVESTMENT-CAST LOW-CARBON NI-BASED SUPERALLOY, WITH APPLICATIONS IN AIRCRAFT AND POWER-GENERATION GAS TURBINES. RESEARCH HAS EXAMINED ITS CASTING DEFECTS, FATIGUE BEHAVIOR, WELD CRACKING AND MACHINING PERFORMANCE. THE KEY DISTINCTION FROM MORE FAMILIAR MATERIALS SUCH AS INCONEL 600, INCONEL 625 OR INCONEL 718 ROUND BAR IS MANUFACTURING FORM: CONVENTIONAL ASTM B-SERIES SPECIFICATIONS COMMONLY ASSOCIATED WITH WROUGHT NICKEL-ALLOY BARS SHOULD NOT SIMPLY BE SUBSTITUTED FOR THE CASTING SPECIFICATION APPLICABLE TO IN 713LC. WHAT IS ALLOY 713LC? ALLOY 713LC IS THE LOW-CARBON VARIANT OF THE IN 713 FAMILY. COMPARED WITH IN 713C, THE LC VERSION REDUCES CARBON WHILE MAINTAINING A NICKEL-CHROMIUM-ALUMINUM-MOLYBDENUM-NIOBIUM ALLOY SYSTEM DESIGNED FOR PRECIPITATION STRENGTHENING. A CURRENT SUPERALLOY PRODUCER IDENTIFIES THE ALLOY AS A LOW-CARBON NICKEL-BASE CAST SUPERALLOY AND GIVES NOMINAL CHEMISTRY INCLUDING APPROXIMATELY: ELEMENT - NOMINAL / REFERENCE VALUE NICKEL BALANCE CHROMIUM 12% MOLYBDENUM 4.5% NIOBIUM / COLUMBIUM 2% ALUMINUM 6% TITANIUM 0.7% CARBON 0.05% BORON 0.01% ZIRCONIUM 0.10% THESE VALUES ALIGN CLOSELY WITH THE CHEMISTRY DEFINED IN AMS 5377, ALTHOUGH INDIVIDUAL HEATS AND REVISIONS MUST ALWAYS BE CHECKED AGAINST THE APPLICABLE PURCHASING SPECIFICATION. AN INDEPENDENT XRF STUDY OF COMMERCIALLY PRODUCED INCONEL 713LC REPORTED APPROXIMATELY 73.87% NI, 12.63% CR, 4.29% MO, 5.65% AL, 2.16% NB AND 0.75% TI, ILLUSTRATING THAT ACTUAL PRODUCTION CHEMISTRY CAN DIFFER WITHIN PERMITTED RANGES FROM SIMPLIFIED NOMINAL COMPOSITIONS. ALLOY 713LC INTERNATIONAL NAMES AND EQUIVALENT DESIGNATIONS ONE OF THE MOST IMPORTANT AND PURCHASING ISSUES IS THAT NOT EVERY NAME APPEARING IN A SUPPLIER CATALOGUE REPRESENTS A TRUE METALLURGICAL EQUIVALENT. PRIMARY DESIGNATIONS ALLOY DESIGNATION: ALLOY 713LC COMMON TECHNICAL DESIGNATION: IN 713LC ALTERNATE TECHNICAL FORM: IN-713LC ALTERNATE SPACING: IN 713 LC NUMERIC TRADE FORM:713LC COMMERCIAL FORM FREQUENTLY ENCOUNTERED: INCONEL 713LC DESCRIPTIVE NAME: LOW-CARBON IN 713 ALLOY FAMILY: IN 713 NICKEL-BASE SUPERALLOY COMMERCIAL METAL WEBSITES COMMONLY USE “INCONEL 713LC” AND “713LC” AS PRODUCT TERMINOLOGY. IMPORTANT WARNING ABOUT “INCONEL” “INCONEL” IS A WELL-KNOWN COMMERCIAL FAMILY/TRADE NAME ASSOCIATED WITH NICKEL ALLOYS. IT SHOULD NOT BE ASSUMED THAT EVERY WEBSITE USING “INCONEL 713LC” ESTABLISHES A SEPARATE CURRENT PROPRIETARY GRADE DESIGNATION. FOR ENGINEERING PROCUREMENT, THE ALLOY DESIGNATION PLUS GOVERNING SPECIFICATION AND CHEMICAL/MECHANICAL REQUIREMENTS SHOULD TAKE PRECEDENCE OVER A COMMERCIAL LABEL. HISTORICAL PRODUCER AND TRADE NAMES OF ALLOY 713LC HISTORICAL ASTM/METALS AND CERAMICS INFORMATION CENTER DOCUMENTATION IS PARTICULARLY VALUABLE BECAUSE IT RECORDS HOW NICKEL-BASE SUPERALLOYS WERE IDENTIFIED BY DIFFERENT PRODUCERS. FOR ALLOY 713LC, HISTORICAL PRODUCER DESIGNATIONS INCLUDE: • ALLVAC 713 LC • AUSTENAL S79M • ALLOY 713 LC • HAYNES ALLOY NO. 713C (LOW CARBON) THE SAME HISTORICAL SOURCE LISTS THESE AS PRODUCER DESIGNATIONS RATHER THAN IMPLYING THAT EACH IS A SEPARATE MODERN ALLOY. THIS DISTINCTION IS USEFUL FOR INTERNATIONAL PROCUREMENT BECAUSE OLDER DRAWINGS, AIRCRAFT-ENGINE DOCUMENTATION AND ARCHIVED TURBINE SPECIFICATIONS CAN USE NAMES THAT DIFFER FROM TODAY'S COMMERCIAL TERMINOLOGY. IS THERE A UNS NUMBER FOR ALLOY 713LC? A CRITICAL PURCHASING POINT IS THAT IN 713LC SHOULD NOT AUTOMATICALLY BE ASSIGNED THE UNS NUMBER N07713. THE INDUSTRY COMPARISON TABLES DISTINGUISH: • IN 713C — UNS N07713 • IN 713LC — AMS 5377, WITH NO UNS NUMBER SHOWN IN THE CORRESPONDING COMPARISON TABLE THE PUBLISHED COMPARISON THEREFORE SHOULD NOT BE INTERPRETED AS ESTABLISHING UNS N07713 = IN 713LC. THIS IS AN IMPORTANT AND TECHNICAL CORRECTION BECAUSE SEVERAL LOW-QUALITY ALLOY DATABASES INCORRECTLY GENERATE “EQUIVALENT GRADE” RELATIONSHIPS FOR SPECIALTY SUPERALLOYS. ALLOY 713LC SPECIFICATION STANDARDS AMS 5377 — PRINCIPAL PUBLIC MATERIAL SPECIFICATION THE MOST IMPORTANT PUBLICLY IDENTIFIABLE MATERIAL SPECIFICATION FOR IN 713LC IS: SAE AMS 5377 THE CURRENT REVISION IDENTIFIED BY SAE IS: AMS 5377H — REVISED JULY 18, 2025 ITS CURRENT TITLE IDENTIFIES: NICKEL ALLOY, CORROSION- AND HEAT-RESISTANT, INVESTMENT CASTINGS, 73NI-12CR-4.5MO-2.0CB (NB)-0.70TI-0.05C-6.0AL-0.010B-0.10ZR, VACUUM CAST, AS-CAST (IN-713 – LOW CARBON). SAE STATES THAT THE SPECIFICATION COVERS THE MATERIAL IN THE FORM OF INVESTMENT CASTINGS. THIS IS THE MOST IMPORTANT STANDARD TO REFERENCE WHEN PURCHASING MATERIAL EXPLICITLY INTENDED TO COMPLY WITH IN 713LC. OEM AND INDUSTRY SPECIFICATION REFERENCES INDUSTRY VACUUM-MELT COMPARISON TABLES ALSO ASSOCIATE IN 713LC WITH ADDITIONAL OEM/CUSTOMER SPECIFICATIONS. PUBLISHED COMPARISON DATA IDENTIFIES THE FOLLOWING REFERENCES ALONGSIDE IN 713LC: • AMS 5377 • B50T1239 • 7048 / MSRR 7048 • EMS 55079 • EMS 55444 THESE REFERENCES APPEAR IN INDUSTRY MATERIAL CROSS-REFERENCE TABLES AND ARE ALSO LISTED BY CURRENT SUPERALLOY SUPPLIERS AS OEM SPECIFICATIONS SUPPORTING IN 713LC. FOR AEROSPACE PROCUREMENT, THESE DOCUMENTS SHOULD BE TREATED AS CONTRACTUAL/OEM REQUIREMENTS WHERE APPLICABLE, NOT AS GENERIC SUBSTITUTES FOR AMS 5377. ASTM, ASME, EN, DIN AND JIS EQUIVALENTS DOES ALLOY 713LC HAVE AN ASTM WROUGHT-ROUND-BAR EQUIVALENT? NO BROADLY APPLICABLE ASTM/ASME WROUGHT-ROUND-BAR SPECIFICATION SPECIFIC TO IN 713LC WAS VERIFIED IN THE CURRENT SOURCES REVIEWED. THIS IS SIGNIFICANT. GENERAL NICKEL-ALLOY BAR STANDARDS SUCH AS: • ASTM B160 • ASTM B164 • ASTM B166 • ASTM B425 • ASTM B446 • ASTM B564 • ASTM B637 APPLY TO PARTICULAR WROUGHT NICKEL AND NICKEL-ALLOY GRADES/FORMS; THEY SHOULD NOT BE AUTOMATICALLY DECLARED SPECIFICATIONS FOR ALLOY 713LC MERELY BECAUSE A SUPPLIER SELLS OTHER NICKEL ALLOYS TO THOSE STANDARDS. THEREFORE, FOR AN IN 713LC ROUND CASTING/ROD, THE MATERIAL SPECIFICATION SHOULD NORMALLY BE DRIVEN BY THE APPLICABLE CASTING/OEM SPECIFICATION AND CUSTOMER DRAWING. EUROPEAN DESIGNATION NO VERIFIED DIRECT EN/WERKSTOFF EQUIVALENT FOR IN 713LC WAS ESTABLISHED FROM THE AUTHORITATIVE/CURRENT SOURCES REVIEWED. GERMAN DESIGNATION NO VERIFIED DIRECT DIN/WERKSTOFF EQUIVALENT WAS ESTABLISHED . JAPANESE DESIGNATION NO VERIFIED DIRECT JIS EQUIVALENT WAS ESTABLISHED. BRITISH DESIGNATION NO CONFIRMED DIRECT MODERN BS EQUIVALENT WAS ESTABLISHED. UNS NO VERIFIED DEDICATED UNS IDENTIFICATION FOR IN 713LC WAS ESTABLISHED IN THE COMPARISON TABLE REVIEWED. ACCORDINGLY, THE TECHNICALLY SAFER STATEMENT IS: ALLOY 713LC DOES NOT HAVE A BROADLY INTERCHANGEABLE ONE-TO-ONE INTERNATIONAL WROUGHT SPECIFICATION EQUIVALENT; AMS 5377 IS THE PRINCIPAL PUBLIC MATERIAL SPECIFICATION IDENTIFIED FOR THE CAST ALLOY. ALLOY 713LC VS IN 713C IN 713LC SHOULD NOT BE CONFUSED WITH STANDARD IN 713C. CHARACTERISTIC IN 713LC ALLOY FAMILY IN 713 CARBON LEVEL LOWER MAIN PRODUCT ROUTE CAST AMS REFERENCE 5377 NIOBIUM ~2% ALUMINUM ~6% MOLYBDENUM ~4.5% PRIMARY DISTINCTION LOWER-CARBON MODIFICATION CHARACTERISTIC IN 713C ALLOY FAMILY IN 713 CARBON LEVEL HIGHER MAIN PRODUCT ROUTE CAST AMS REFERENCE 5391 NIOBIUM ~2% ALUMINUM ~6% MOLYBDENUM ~4.5% PRIMARY DISTINCTION HIGHER-CARBON ORIGINAL VARIANT INDUSTRY MATERIAL TABLES IDENTIFY IN 713C WITH AMS 5391 AND IN 713LC WITH AMS 5377) THE LOWER-CARBON MODIFICATION IS IMPORTANT FOR FABRICATION AND REPAIR. PARMANU DHATU NIGAM SPECIFICALLY NOTES THAT REDUCED CARBON IMPROVES GRAIN-BOUNDARY WELDABILITY WHILE RETAINING STRONG PRECIPITATION-HARDENED CREEP AND TENSILE PERFORMANCE. ALLOY 713LC ROUND BAR MANUFACTURING PROCESS BECAUSE ALLOY 713LC IS FUNDAMENTALLY A CAST SUPERALLOY, MANUFACTURING SHOULD BEGIN WITH CONTROLLED MELTING AND CASTING, FOLLOWED BY APPROPRIATE FINISHING OR MACHINING WHERE A ROUND-BAR/ROD GEOMETRY IS REQUIRED. 1) RAW MATERIAL SELECTION THE CHARGE MATERIALS ARE SELECTED TO MEET THE REQUIRED NICKEL-BASE CHEMISTRY. HIGH-PURITY ALLOYING ADDITIONS ARE TYPICALLY CONTROLLED FOR: • NICKEL • CHROMIUM • MOLYBDENUM • ALUMINUM • NIOBIUM • TITANIUM • ZIRCONIUM • BORON • CARBON • IRON AND RESIDUAL ELEMENTS TRACE-ELEMENT CONTROL IS PARTICULARLY IMPORTANT FOR PREMIUM AEROSPACE APPLICATIONS. 2) VACUUM MELTING IN 713LC IS ASSOCIATED WITH VACUUM MELTING/VACUUM CASTING. AMS 5377 SPECIFICALLY DESCRIBES THE ALLOY AS VACUUM CAST, AND INDUSTRY VACUUM-MELT DATABASES LIST IN 713LC UNDER NICKEL-BASE EQUIAXED SUPERALLOYS. VACUUM PROCESSING HELPS CONTROL: • GAS PICKUP • OXYGEN • NITROGEN • HYDROGEN • OXIDE INCLUSIONS • REACTIVE ALLOYING ADDITIONS FOR CRITICAL TURBINE MATERIAL, MELT CLEANLINESS IS CENTRAL TO FATIGUE PERFORMANCE AND CASTING RELIABILITY. 3) INVESTMENT CASTING OR CONTROLLED CASTING THE CASTING PROCESS ESTABLISHES THE FUNDAMENTAL MICROSTRUCTURE. IN 713LC CAN BE INVESTMENT CAST INTO: • TURBINE BLADES • TURBINE VANES • WHEEL COMPONENTS • AIRFOIL SECTIONS • TEST BARS • CYLINDRICAL RODS • LABORATORY ROUND SPECIMENS • CUSTOM CAST STOCK FOR MACHINING RESEARCH HAS SPECIFICALLY INVESTIGATED CAST IN 713LC RODS, INCLUDING CONVENTIONALLY CAST 20 MM DIAMETER RODS USED FOR HIGH-TEMPERATURE FATIGUE TESTING. 4) CONTROLLED SOLIDIFICATION DURING SOLIDIFICATION, THE ALLOY DEVELOPS A DENDRITIC MICROSTRUCTURE CONTAINING THE NICKEL-RICH MATRIX AND STRENGTHENING PHASES. CASTING CONTROL IS IMPORTANT BECAUSE IN 713LC CAN CONTAIN: • MICROPOROSITY • SHRINKAGE POROSITY • DENDRITIC SEGREGATION • NONMETALLIC INCLUSIONS • CARBIDE/PRECIPITATE-RELATED FEATURES • OTHER SOLIDIFICATION DEFECTS PUBLISHED FATIGUE RESEARCH REPORTS THAT CASTING DEFECTS CAN STRONGLY INFLUENCE FATIGUE-LIFE SCATTER IN IN 713LC. 5) HEAT TREATMENT CONSIDERATIONS ONE OF THE UNUSUAL CHARACTERISTICS OF IN 713LC COMPARED WITH MANY WROUGHT PRECIPITATION-HARDENING NICKEL ALLOYS IS THAT IT IS COMMONLY SUPPLIED AND USED AS A CAST ALLOY WITHOUT REQUIRING THE SAME TYPE OF CONVENTIONAL SOLUTION-AGING SCHEDULE USED FOR WROUGHT SUPERALLOYS. RESEARCH LITERATURE DESCRIBES CONVENTIONAL IN-713LC AS A LOW-CARBON CAST SUPERALLOY ON WHICH NO HEAT TREATMENT IS REQUIRED FOR ITS STANDARD CAST APPLICATION. HOWEVER, THE ACTUAL HEAT TREATMENT CONDITION MUST ALWAYS FOLLOW THE GOVERNING DRAWING, OEM SPECIFICATION OR PURCHASE SPECIFICATION. A GENERIC “SOLUTION ANNEALED AND AGED” DESCRIPTION SHOULD NOT BE ADDED TO AN IN 713LC QUOTATION UNLESS THE CUSTOMER SPECIFICATION ACTUALLY REQUIRES IT. 6) REMOVAL OF CASTING STOCK WHEN PRODUCING A 713LC ROUND BAR/ROD, MACHINING CAN BE USED TO CONVERT A CAST CYLINDRICAL BLANK TO THE REQUIRED FINISHED DIMENSIONS. TYPICAL OPERATIONS MAY INCLUDE: • SAWING • TURNING • ROUGH MACHINING • CENTER DRILLING • PEELING • GRINDING • POLISHING • FACING • CHAMFERING • PRECISION TURNING THE APPROPRIATE PROCESS DEPENDS ON WHETHER THE PRODUCT IS: CAST ROD → MACHINED SPECIMEN → FINISHED ROUND STOCK RATHER THAN CONVENTIONAL: BILLET → FORGING → HOT ROLLING → COLD DRAWING → BAR THAT DISTINCTION SHOULD BE STATED CLEARLY IN TECHNICAL DOCUMENTATION. 7) CNC MACHINING OF ALLOY 713LC IN 713LC IS DIFFICULT TO MACHINE BECAUSE IT IS A HIGH-STRENGTH, PRECIPITATION-STRENGTHENED NICKEL SUPERALLOY. RECENT RESEARCH HAS SPECIFICALLY INVESTIGATED THE DRY MACHINING OF INCONEL 713LC, MEASURING CUTTING FORCE AND SURFACE-INTEGRITY BEHAVIOR. IMPORTANT MACHINING CONTROLS INCLUDE: • RIGID WORKHOLDING • APPROPRIATE CARBIDE TOOLING • CONTROLLED CUTTING SPEED • CONTROLLED FEED • ADEQUATE CHIP EVACUATION • AVOIDANCE OF EXCESSIVE TOOL-WORKPIECE HEAT • FREQUENT TOOL INSPECTION • DIMENSIONAL INSPECTION AFTER MACHINING NICKEL-BASE SUPERALLOYS CAN EXPERIENCE WORK HARDENING AND ACCELERATED CUTTING-TOOL WEAR, SO MACHINING PARAMETERS SHOULD BE DEVELOPED SPECIFICALLY FOR THE MATERIAL RATHER THAN COPIED FROM STAINLESS-STEEL OR CONVENTIONAL NICKEL-ALLOY BAR. 8) SURFACE FINISHING OF 713LC ROUND BAR DEPENDING ON THE ENGINEERING REQUIREMENT, FINISHED CYLINDRICAL STOCK CAN RECEIVE: AS-CAST FINISH → ROUGH TURNED → PRECISION TURNED → GROUND → POLISHED TYPICAL INSPECTION PARAMETERS MAY INCLUDE: • DIAMETER • ROUNDNESS • STRAIGHTNESS • SURFACE ROUGHNESS • VISUAL SURFACE CONDITION • END SQUARENESS • MACHINING ALLOWANCE FOR AEROSPACE APPLICATIONS, DIMENSIONAL AND SURFACE REQUIREMENTS SHOULD BE CONTROLLED AGAINST THE DRAWING OR OEM SPECIFICATION RATHER THAN AGAINST GENERIC COMMERCIAL “BRIGHT BAR” TOLERANCES. 9) NON-DESTRUCTIVE TESTING THE APPROPRIATE NDT PROGRAM DEPENDS ON GEOMETRY AND CUSTOMER SPECIFICATION. POSSIBLE METHODS INCLUDE: RADIOGRAPHIC TESTING USED TO INVESTIGATE INTERNAL CASTING DISCONTINUITIES SUCH AS: • POROSITY • SHRINKAGE • INCLUSIONS • LARGER CASTING DEFECTS ULTRASONIC TESTING POTENTIALLY APPLICABLE TO SUITABLE GEOMETRIES FOR INTERNAL-DISCONTINUITY EVALUATION, SUBJECT TO THE GOVERNING SPECIFICATION AND MATERIAL GEOMETRY. LIQUID PENETRANT TESTING PARTICULARLY USEFUL FOR DETECTING SURFACE-CONNECTED CRACKS AFTER: • CASTING • GRINDING • MACHINING • REPAIR • HEAT EXPOSURE DIMENSIONAL INSPECTION INCLUDES: • OD MEASUREMENT • LENGTH • CONCENTRICITY • STRAIGHTNESS • ROUNDNESS • SURFACE ROUGHNESS THE NDT METHOD AND ACCEPTANCE CRITERIA MUST BE SPECIFIED CONTRACTUALLY; ONE UNIVERSAL UT OR RADIOGRAPHIC ACCEPTANCE LEVEL SHOULD NOT BE INVENTED FOR ALL 713LC PRODUCTS. ALLOY 713LC CHEMICAL COMPOSITION A PRACTICAL REFERENCE CHEMISTRY DERIVED FROM CURRENT MANUFACTURER/SPECIFICATION SOURCES IS: ELEMENT - APPROXIMATE REFERENCE NI BALANCE CR 12% MO 4.5% NB/CB 2% AL 6% TI 0.7% C 0.05% B 0.01% ZR 0.10% SOME PUBLISHED CHEMISTRY TABLES GIVE SLIGHTLY DIFFERENT LIMITS/NOMINAL VALUES, INCLUDING APPROXIMATELY 0.06% C, 5.8% AL, 4.3% MO AND 0.007% B. THAT VARIATION REINFORCES THE NEED TO USE THE HEAT CERTIFICATE AND GOVERNING REVISION OF AMS 5377 WHEN SPECIFYING ACTUAL CHEMICAL LIMITS. MECHANICAL AND HIGH-TEMPERATURE PERFORMANCE ALLOY 713LC IS VALUED PRIMARILY FOR ELEVATED-TEMPERATURE MECHANICAL PERFORMANCE. ITS IMPORTANT PERFORMANCE CHARACTERISTICS INCLUDE: • HIGH-TEMPERATURE TENSILE STRENGTH • STRESS-RUPTURE STRENGTH • CREEP RESISTANCE • THERMAL-FATIGUE RESISTANCE • OXIDATION/CORROSION RESISTANCE • PRECIPITATION-STRENGTHENING RESPONSE • USEFUL CASTABILITY • IMPROVED LOW-CARBON WELDABILITY RELATIVE TO IN 713C ASM DESCRIBES ALLOY 713LC AS POSSESSING HIGH STRESS-RUPTURE STRENGTH UP TO APPROXIMATELY 1700°F AND GOOD THERMAL-FATIGUE RESISTANCE. RESEARCH LITERATURE IDENTIFIES SERVICE/APPLICATION RANGES AROUND 500–915°C DEPENDING ON COMPONENT, ENVIRONMENT AND DESIGN CONDITIONS. THESE FIGURES SHOULD NOT BE INTERPRETED AS A UNIVERSAL ALLOWABLE CONTINUOUS-USE TEMPERATURE FOR EVERY 713LC COMPONENT. MICROSTRUCTURE OF ALLOY 713LC THE CAST ALLOY HAS A PREDOMINANTLY DENDRITIC MICROSTRUCTURE. STRENGTH IS ASSOCIATED WITH PRECIPITATION-STRENGTHENING MECHANISMS IN THE NICKEL MATRIX, WHILE ALLOYING ELEMENTS SUCH AS: • ALUMINUM • TITANIUM • NIOBIUM CONTRIBUTE TO THE STRENGTHENING PHASE SYSTEM. RESEARCH ON GRAIN REFINEMENT HAS SHOWN THAT GRAIN SIZE, MICROPOROSITY AND PRECIPITATE/CARBIDE STRUCTURE CAN INFLUENCE TENSILE AND FATIGUE PERFORMANCE. THIS IS WHY CASTING QUALITY IS NOT MERELY A DIMENSIONAL CONCERN: INTERNAL CASTING INTEGRITY DIRECTLY AFFECTS MECHANICAL RELIABILITY. APPLICATIONS OF ALLOY 713LC ROUND BAR AND CAST ROD ALTHOUGH THE TERM “ROUND BAR” IS COMMON IN ONLINE PURCHASING SEARCHES, THE ALLOY'S MOST IMPORTANT ENGINEERING APPLICATIONS ARE ASSOCIATED WITH CAST COMPONENTS. AEROSPACE IN 713LC IS USED IN DEMANDING AEROSPACE ENVIRONMENTS INCLUDING: • TURBINE BLADES • TURBINE VANES • HOT-SECTION COMPONENTS • ENGINE SUBASSEMBLIES • REPAIRABLE CAST COMPONENTS • TEST AND DEVELOPMENT COMPONENTS PUBLISHED TECHNICAL RESEARCH IDENTIFIES ITS USE IN AIRCRAFT GAS-TURBINE HOT SECTIONS. INDUSTRIAL GAS TURBINES TYPICAL APPLICATIONS INCLUDE: • STATIONARY TURBINE BLADES • TURBINE VANES • ROTATING HOT-SECTION COMPONENTS • COMBUSTION-RELATED HARDWARE • HIGH-TEMPERATURE POWER-GENERATION COMPONENTS TURBOCHARGER AND TURBINE-WHEEL COMPONENTS THE ALLOY HAS ALSO BEEN ASSOCIATED WITH INTEGRAL TURBINE WHEELS AND TURBOCHARGER WHEELS, WHERE CASTABILITY AND THERMAL-FATIGUE RESISTANCE ARE IMPORTANT. RESEARCH AND TESTING 713LC CYLINDRICAL RODS ARE ALSO USED AS RESEARCH/TEST MATERIAL FOR: • FATIGUE TESTING • MACHINING STUDIES • CASTING-DEFECT CHARACTERIZATION • HIGH-TEMPERATURE MECHANICAL TESTING • MICROSTRUCTURE INVESTIGATIONS ALLOY 713LC ROUND BAR VS INCONEL 718 ROUND BAR THESE TWO MATERIALS SHOULD NOT BE TREATED AS INTERCHANGEABLE. ALLOY 713LC PRIMARY ALLOY FORM: CAST MAJOR APPLICATION: TURBINE CASTINGS MAIN SPECIFICATION FAMILY: AMS 5377 CASTING CAPABILITY: EXCELLENT PRECIPITATION STRENGTHENING: YES TYPICAL PROCUREMENT FORM: CASTING/CUSTOM CAST ROD DIRECT SUBSTITUTION: NO INCONEL 718 PRIMARY ALLOY FORM: PREDOMINANTLY WROUGHT/FORGED MAJOR APPLICATION: AEROSPACE/INDUSTRIAL WROUGHT COMPONENTS MAIN SPECIFICATION FAMILY: MULTIPLE WROUGHT SPECIFICATIONS CASTING CAPABILITY: NOT THE DEFINING PRODUCT ROUTE PRECIPITATION STRENGTHENING: YES TYPICAL PROCUREMENT FORM: ROUND BAR, FORGING, BILLET, SHEET, ETC. DIRECT SUBSTITUTION: NO THIS COMPARISON IS IMPORTANT BECAUSE SEARCHES FOR “NICKEL ALLOY ROUND BAR” OFTEN MIX CAST SUPERALLOYS AND WROUGHT SUPERALLOYS. ALLOY 713LC ROUND BAR MANUFACTURING QUALITY CONTROL A PROFESSIONAL MANUFACTURING ROUTE SHOULD ESTABLISH FULL TRACEABILITY FROM MELT TO FINISHED PRODUCT. TYPICAL DOCUMENTATION PACKAGE DEPENDING ON THE CUSTOMER REQUIREMENT: • MATERIAL TEST CERTIFICATE • HEAT NUMBER • CHEMICAL ANALYSIS • MECHANICAL TEST REPORT • DIMENSIONAL INSPECTION REPORT • NDT REPORT • RADIOGRAPHY REPORT • PENETRANT INSPECTION REPORT • POSITIVE MATERIAL IDENTIFICATION • HEAT-TREATMENT RECORD WHERE APPLICABLE • CERTIFICATE OF CONFORMITY • CERTIFICATE OF ORIGIN • EN 10204 DOCUMENTATION WHERE CONTRACTUALLY REQUESTED EN 10204 CAN BE USED AS A DOCUMENTATION FRAMEWORK WHERE SPECIFIED, BUT IT DOES NOT TRANSFORM IN 713LC INTO AN EN-DESIGNATED WROUGHT ALLOY. TYPICAL ALLOY 713LC ROUND BAR MANUFACTURING WORKFLOW RAW-MATERIAL PREPARATION ↓ VACUUM MELTING ↓ CHEMICAL ANALYSIS ↓ INVESTMENT / CONTROLLED CASTING ↓ CONTROLLED SOLIDIFICATION ↓ CASTING INSPECTION ↓ RADIOGRAPHIC / PENETRANT / DIMENSIONAL INSPECTION AS SPECIFIED ↓ CUTTING ↓ CNC TURNING / GRINDING ↓ FINAL DIMENSIONAL INSPECTION ↓ SURFACE INSPECTION ↓ MATERIAL CERTIFICATION AND TRACEABILITY ↓ PACKING FOR AEROSPACE/INDUSTRIAL SHIPMENT COMMON ALLOY 713LC PRODUCT FORMS DEPENDING ON THE SUPPLIER'S MANUFACTURING CAPABILITIES, THE TERM “713LC BAR” CAN REFER TO: • ALLOY 713LC CAST ROUND BAR • IN 713LC CAST ROD • ALLOY 713LC CYLINDRICAL CASTING • 713LC TEST BAR • 713LC MACHINED ROUND STOCK • 713LC TURBINE CASTING • IN 713LC INVESTMENT CASTING • CUSTOM 713LC CASTING • 713LC MACHINING BLANK A PURCHASE ORDER SHOULD THEREFORE DEFINE CAST VERSUS WROUGHT FORM, DIMENSIONS, INSPECTION REQUIREMENTS AND CERTIFICATION. ALLOY 713LC SIZE AND DIMENSIONAL REQUIREMENTS THERE IS NO SINGLE UNIVERSAL COMMERCIAL “STANDARD SIZE CHART” FOR 713LC ROUND BAR COMPARABLE TO COMMON WROUGHT STAINLESS-STEEL OR NICKEL-ALLOY BAR GRADES. SIZES CAN BE PRODUCED ACCORDING TO: • CUSTOMER DRAWING • CASTING DESIGN • MACHINING ALLOWANCE • TEST SPECIMEN DIMENSIONS • REPLACEMENT-COMPONENT DIMENSIONS • OEM DIMENSIONAL REQUIREMENTS RESEARCH HAS DEMONSTRATED CONVENTIONAL CAST RODS OF APPROXIMATELY 20 MM DIAMETER, SHOWING THAT CYLINDRICAL ROD GEOMETRIES ARE USED EXPERIMENTALLY. COMMERCIAL SUPPLIERS MAY OFFER ADDITIONAL SIZES, BUT THOSE SIZES SHOULD BE VERIFIED AGAINST ACTUAL MANUFACTURING CAPABILITY RATHER THAN PRESENTED AS STANDARDIZED AMS ROUND-BAR DIMENSIONS. ALLOY 713LC MACHINING CHALLENGES MACHINISTS WORKING WITH THIS ALLOY SHOULD ANTICIPATE: HIGH TOOL WEAR THE HARD NICKEL-BASE MATRIX AND STRENGTHENING PHASES CAN RAPIDLY DEGRADE TOOLING. WORK HARDENING REPEATED PASSES OVER INADEQUATELY CONTROLLED SURFACES CAN MAKE SUBSEQUENT MACHINING MORE DIFFICULT. HEAT GENERATION LOW THERMAL CONDUCTIVITY AND HIGH CUTTING RESISTANCE CAN INCREASE CUTTING TEMPERATURES. CASTING-RELATED VARIABILITY POROSITY AND MICROSTRUCTURAL VARIATION CAN AFFECT MACHINING RESPONSE. THE LATEST MACHINING LITERATURE CONFIRMS THAT INCONEL 713LC PRESENTS MEASURABLE CUTTING-FORCE AND SURFACE-INTEGRITY CHALLENGES DURING MACHINING. WELDING AND REPAIR OF ALLOY 713LC THE LOW-CARBON CHEMISTRY IS PARTICULARLY RELEVANT TO REPAIRABILITY. PARMANU DHATU NIGAM STATES THAT THE LOWER CARBON CONTENT OF IN 713LC COMPARED WITH IN 713C IMPROVES GRAIN-BOUNDARY WELDABILITY WHILE PRESERVING ELEVATED-TEMPERATURE PERFORMANCE. NEVERTHELESS, WELDING MUST BE TREATED AS A CONTROLLED AEROSPACE/PROCESS-ENGINEERING OPERATION. PUBLISHED RESEARCH HAS DOCUMENTED FUSION-ZONE AND HEAT-AFFECTED-ZONE CRACKING IN ELECTRON-BEAM WELDED IN 713LC, DEMONSTRATING WHY WELDING PARAMETERS, THERMAL HISTORY AND POST-WELD CONDITION MUST BE CAREFULLY CONTROLLED. GLOBAL TRADE NAMES AND SEARCH VARIANTS FOR ALLOY 713LC FOR INTERNATIONAL, PROCUREMENT AND MULTILINGUAL CATALOGUING, THE FOLLOWING SEARCH VARIANTS ARE USEFUL: ENGLISH • ALLOY 713LC ROUND BAR • 713LC ROUND BAR • IN 713LC ROUND BAR • IN-713LC ROUND BAR • INCONEL 713LC ROUND BAR • 713LC NICKEL ALLOY • 713LC SUPERALLOY • 713LC MATERIAL • 713LC BAR • 713LC ROD • 713LC CASTING • IN 713 LC CASTING • 713LC INVESTMENT CASTING • 713LC TURBINE ALLOY • 713LC AEROSPACE ALLOY • 713LC HIGH TEMPERATURE ALLOY PROCUREMENT-FOCUSED VARIANTS • ALLOY 713LC MANUFACTURER • ALLOY 713LC SUPPLIER • ALLOY 713LC EXPORTER • ALLOY 713LC STOCKIST • ALLOY 713LC ROUND BAR SUPPLIER • IN 713LC MANUFACTURER • INCONEL 713LC SUPPLIER • 713LC MATERIAL SUPPLIER • AMS 5377 SUPPLIER • AMS 5377 CASTING MANUFACTURER • NICKEL SUPERALLOY MANUFACTURER • TURBINE ALLOY SUPPLIER HIGH-VALUE GLOBAL KEYWORD CLUSTER BECAUSE EXACT WORLDWIDE MONTHLY SEARCH VOLUMES FROM PROPRIETARY PLATFORMS SUCH AS GOOGLE KEYWORD PLANNER ARE NOT PUBLICLY EXPOSED IN THE SOURCES AVAILABLE HERE, IT WOULD BE MISLEADING TO INVENT NUMERICAL SEARCH VOLUMES. THE FOLLOWING KEYWORD HIERARCHY IS INSTEAD BUILT AROUND GLOBAL SEARCH INTENT, SERP TERMINOLOGY, COMMERCIAL RELEVANCE AND INDUSTRY USAGE. HIGHEST-PRIORITY TRANSACTIONAL KEYWORDS ALLOY 713LC ROUND BAR INCONEL 713LC ROUND BAR IN 713LC ROUND BAR 713LC ROUND BAR ALLOY 713LC SUPPLIER ALLOY 713LC MANUFACTURER 713LC SUPPLIER 713LC MANUFACTURER IN 713LC SUPPLIER IN 713LC MANUFACTURER HIGH-VALUE TECHNICAL KEYWORDS 713LC MATERIAL 713LC SPECIFICATION 713LC COMPOSITION 713LC PROPERTIES IN 713LC COMPOSITION IN 713LC PROPERTIES ALLOY 713LC CHEMICAL COMPOSITION ALLOY 713LC MECHANICAL PROPERTIES AMS 5377 AMS 5377H IN 713LC AMS 5377 NICKEL BASE SUPERALLOY NICKEL BASED SUPERALLOY HIGH TEMPERATURE NICKEL ALLOY CAST NICKEL ALLOY APPLICATION KEYWORDS 713LC TURBINE BLADE 713LC TURBINE WHEEL 713LC GAS TURBINE ALLOY 713LC AEROSPACE ALLOY 713LC TURBINE ALLOY 713LC HOT SECTION ALLOY NICKEL ALLOY TURBINE BLADE GAS TURBINE NICKEL ALLOY AIRCRAFT ENGINE SUPERALLOY HIGH TEMPERATURE TURBINE MATERIAL MANUFACTURING KEYWORDS 713LC MANUFACTURING 713LC ROUND BAR MANUFACTURING 713LC CASTING 713LC INVESTMENT CASTING IN 713LC CASTING PROCESS 713LC MACHINING 713LC CNC MACHINING NICKEL SUPERALLOY MACHINING SUPERALLOY CASTING MANUFACTURER NICKEL ALLOY CASTING MANUFACTURER LONG-TAIL KEYWORDS THESE ARE PARTICULARLY USEFUL FOR PRODUCT-CATEGORY AND TECHNICAL LANDING PAGES: • ALLOY 713LC ROUND BAR MANUFACTURER IN INDIA • INCONEL 713LC ROUND BAR SUPPLIER • IN 713LC ROUND BAR EXPORTER • AMS 5377 ALLOY 713LC CASTING • ALLOY 713LC INVESTMENT CASTING MANUFACTURER • 713LC NICKEL ALLOY CHEMICAL COMPOSITION • IN 713LC MATERIAL SPECIFICATION • 713LC TURBINE BLADE MATERIAL • 713LC TURBINE WHEEL ALLOY • 713LC HIGH TEMPERATURE PROPERTIES • IN 713LC MACHINING • ALLOY 713LC CASTING SUPPLIER • 713LC AEROSPACE SUPERALLOY SUPPLIER • 713LC NICKEL BASE SUPERALLOY • ALLOY 713LC CUSTOM CASTING • 713LC CAST ROD SUPPLIER • 713LC CYLINDRICAL CASTING • ALLOY 713LC MATERIAL CERTIFICATE • AMS 5377H SUPPLIER • IN 713 LC AEROSPACE MATERIAL COMMON SEARCH MISTAKES TO AVOID “713LC = UNS N07713” NOT NECESSARILY. N07713 IS ASSOCIATED WITH IN 713C IN THE CROSS-REFERENCE MATERIAL REVIEWED, WHILE IN 713LC IS SEPARATELY IDENTIFIED WITH AMS 5377) “713LC IS THE SAME AS INCONEL 718” INCORRECT. “713LC FOLLOWS ASTM B637” DO NOT MAKE THIS STATEMENT UNLESS THE ACTUAL PRODUCT SPECIFICATION EXPLICITLY INVOKES THAT STANDARD FOR THE PARTICULAR MATERIAL AND FORM. “713LC IS A CONVENTIONAL FORGED ROUND BAR” THIS CAN BE TECHNICALLY MISLEADING. THE PRINCIPAL SPECIFICATION IDENTIFIED IS FOR INVESTMENT CASTINGS. “ALLOY 713LC HAS A DIRECT DIN/JIS/EN EQUIVALENT” A DIRECT INTERNATIONALLY STANDARDIZED ONE-TO-ONE EQUIVALENT WAS NOT VERIFIED. FREQUENTLY ASKED QUESTIONS WHAT IS ALLOY 713LC? ALLOY 713LC IS A LOW-CARBON NICKEL-BASE CAST SUPERALLOY DEVELOPED FOR HIGH-TEMPERATURE APPLICATIONS INCLUDING TURBINE COMPONENTS. WHAT IS THE SPECIFICATION FOR ALLOY 713LC? THE PRINCIPAL PUBLIC MATERIAL SPECIFICATION IS SAE AMS 5377, CURRENTLY LISTED BY SAE AS AMS 5377H, REVISED JULY 18, 2025) IS ALLOY 713LC A WROUGHT ALLOY? ITS PRINCIPAL STANDARDIZED FORM IS CAST, ESPECIALLY VACUUM INVESTMENT-CAST MATERIAL. CALLING EVERY 713LC PRODUCT A CONVENTIONAL WROUGHT BAR WOULD BE MISLEADING. WHAT IS THE DIFFERENCE BETWEEN IN 713LC AND IN 713C? IN 713LC IS THE LOWER-CARBON MODIFICATION. IN 713C HAS A HIGHER CARBON CONTENT AND IS COVERED BY A DIFFERENT SPECIFICATION, AMS 5391, IN THE INDUSTRY REFERENCES REVIEWED. IS INCONEL 713LC THE SAME AS ALLOY 713LC? “INCONEL 713LC” IS A COMMONLY ENCOUNTERED COMMERCIAL/SEARCH TERM FOR THE MATERIAL, WHILE ALLOY 713LC / IN 713LC IS THE MORE USEFUL GENERIC ENGINEERING DESIGNATION FOR SPECIFICATION AND PROCUREMENT PURPOSES. WHAT IS ALLOY 713LC USED FOR? MAJOR APPLICATIONS INCLUDE TURBINE BLADES, VANES, INTEGRAL WHEELS AND OTHER GAS-TURBINE/AEROSPACE HOT-SECTION APPLICATIONS. CAN ALLOY 713LC BE MACHINED? YES, BUT IT IS A DIFFICULT-TO-MACHINE NICKEL-BASE SUPERALLOY. DEDICATED CUTTING-TOOL AND PROCESS PARAMETERS ARE REQUIRED, AND RECENT RESEARCH HAS SPECIFICALLY EXAMINED ITS MACHINING BEHAVIOR. DOES ALLOY 713LC REQUIRE HEAT TREATMENT? CONVENTIONAL CAST IN 713LC IS DESCRIBED IN RESEARCH LITERATURE AS AN ALLOY FOR WHICH HEAT TREATMENT IS NOT NECESSARILY REQUIRED. ACTUAL PRODUCTION CONDITION MUST NEVERTHELESS FOLLOW THE APPLICABLE OEM/MATERIAL SPECIFICATION. DOES ALLOY 713LC HAVE A UNS NUMBER? A DEDICATED UNS NUMBER WAS NOT ESTABLISHED FOR IN 713LC IN THE CROSS-REFERENCE SOURCES REVIEWED. UNS N07713 SHOULD NOT BE AUTOMATICALLY ASSIGNED TO IT, BECAUSE THAT DESIGNATION IS SHOWN WITH IN 713C. RECOMMENDED TECHNICAL DESCRIPTION FOR A PRODUCT PAGE FOR AN INDUSTRIAL WEBSITE, A TECHNICALLY SAFER DESCRIPTION IS: ALLOY 713LC ROUND BAR / CAST ROD IS A LOW-CARBON NICKEL-BASE SUPERALLOY PRODUCED PRIMARILY BY CONTROLLED VACUUM CASTING AND SUPPLIED AS CYLINDRICAL CAST STOCK OR MACHINED ROUND MATERIAL ACCORDING TO DRAWING AND SPECIFICATION REQUIREMENTS. IT IS ASSOCIATED WITH SAE AMS 5377 AND IS WIDELY USED FOR HIGH-TEMPERATURE TURBINE, AEROSPACE, POWER-GENERATION AND OTHER DEMANDING APPLICATIONS REQUIRING ELEVATED-TEMPERATURE STRENGTH, CREEP RESISTANCE AND THERMAL-FATIGUE PERFORMANCE. CONCLUSION ALLOY 713LC, ALSO KNOWN AS IN 713LC, IN 713 LC, IN-713LC AND COMMERCIALLY “INCONEL 713LC, ” IS A SPECIALIZED LOW-CARBON NICKEL-BASE SUPERALLOY WITH A STRONG HISTORY IN TURBINE AND OTHER HIGH-TEMPERATURE APPLICATIONS. THE MOST IMPORTANT SPECIFICATION DISTINCTION IS THAT SAE AMS 5377 IS AN INVESTMENT-CASTING MATERIAL SPECIFICATION, WITH THE CURRENT REVISION IDENTIFIED AS AMS 5377H, RATHER THAN A GENERIC WROUGHT-ROUND-BAR SPECIFICATION. ITS TECHNICAL AND COMMERCIAL IDENTITY IS SUPPORTED BY SEVERAL CROSS-REFERENCE SOURCES THAT ASSOCIATE IT WITH B50T1239, MSRR 7048, EMS 55079 AND EMS 55444, WHILE HISTORICAL DOCUMENTATION RECORDS PRODUCER DESIGNATIONS INCLUDING ALLVAC 713 LC, AUSTENAL S79M AND HAYNES ALLOY NO. 713C (LOW CARBON). FOR, THE STRONGEST TERMINOLOGY COMBINES THE SPECIFIC ALLOY DESIGNATION WITH BROADER HIGH-INTENT SEARCHES SUCH AS NICKEL ALLOY ROUND BAR, NICKEL SUPERALLOY, HIGH-TEMPERATURE ALLOY, TURBINE ALLOY, AEROSPACE NICKEL ALLOY, INVESTMENT CASTING, AMS 5377, 713LC MANUFACTURER, 713LC SUPPLIER AND INCONEL 713LC ROUND BAR. BECAUSE PUBLIC SOURCES DO NOT EXPOSE AUTHORITATIVE WORLDWIDE MONTHLY SEARCH-VOLUME NUMBERS FOR EVERY HIGHLY SPECIALIZED ALLOY PHRASE, EXACT NUMERICAL “GLOBAL VOLUME” FIGURES SHOULD NOT BE FABRICATED. AUTHORITATIVE REFERENCES USED SAE INTERNATIONAL IDENTIFIES AMS 5377H AS THE CURRENT REVISED SPECIFICATION FOR IN-713 LOW CARBON VACUUM-CAST INVESTMENT CASTINGS. PARMANU DHATU NIGAM SUPERALLOY TECHNOLOGIES IDENTIFIES IN 713 LC AS A CAST ALLOY, GIVES ITS NOMINAL CHEMISTRY, AMS 5377 QUALIFICATION AND OEM SPECIFICATION REFERENCES. ASM ALLOY DIGEST IDENTIFIES ALLOY 713LC AS A HIGH-TEMPERATURE NICKEL ALLOY WITH STRONG STRESS-RUPTURE AND THERMAL-FATIGUE PERFORMANCE.