AMS 5377 ROUND BAR MANUFACTURING: THE COMPLETE GLOBAL GUIDE TO IN-713LC, INCONEL 713LC, UNS N07713, INVESTMENT CASTING, EQUIVALENTS & SPECIFICATIONS INTRODUCTION TO AMS 5377 ROUND BAR AMS 5377 IS ASSOCIATED WITH A HIGH-TEMPERATURE NICKEL-BASED SUPERALLOY COMMONLY IDENTIFIED AS IN-713LC, INCONEL 713LC, ALLOY 713LC, OR 713LC. IT IS A LOW-CARBON NICKEL-BASE ALLOY DEVELOPED FOR DEMANDING HIGH-TEMPERATURE APPLICATIONS WHERE OXIDATION RESISTANCE, CREEP STRENGTH, THERMAL STABILITY AND RESISTANCE TO THERMAL FATIGUE ARE IMPORTANT. THE CRITICAL POINT FOR BUYERS, ENGINEERS AND MANUFACTURERS IS THAT SAE AMS 5377 IS AN INVESTMENT-CASTING SPECIFICATION RATHER THAN A CONVENTIONAL WROUGHT ROUND-BAR SPECIFICATION. SAE'S CURRENT AMS 5377H IDENTIFIES THE MATERIAL AS A CORROSION- AND HEAT-RESISTANT NICKEL ALLOY FOR INVESTMENT CASTINGS, WITH A NOMINAL CHEMISTRY OF APPROXIMATELY 73% NICKEL, 12% CHROMIUM, 4.5% MOLYBDENUM, 2.0% NIOBIUM/COLUMBIUM, 0.70% TITANIUM, 0.05% CARBON, 6.0% ALUMINUM AND CONTROLLED BORON/ZIRCONIUM ADDITIONS. CONSEQUENTLY, THE EXPRESSION “AMS 5377 ROUND BAR” IS WIDELY ENCOUNTERED IN INTERNATIONAL TRADE, ALTHOUGH TECHNICALLY IT SHOULD BE DISTINGUISHED FROM A CONVENTIONAL ASTM/ASME WROUGHT NICKEL-ALLOY BAR SPECIFICATION. FOR PROCUREMENT PURPOSES, BUYERS SHOULD SPECIFY WHETHER THEY REQUIRE: • AMS 5377H INVESTMENT CASTING • IN-713LC CAST BAR • INCONEL 713LC ROUND CAST STOCK • CAST TEST BAR • MACHINING STOCK • FORGED/WROUGHT NICKEL-ALLOY BAR • OR ANOTHER SPECIFICATION APPLICABLE TO WROUGHT PRODUCT THIS DISTINCTION CAN PREVENT SIGNIFICANT MATERIAL-CERTIFICATION AND TRACEABILITY PROBLEMS. WHAT IS AMS 5377? AMS 5377 IS A SAE AEROSPACE MATERIAL SPECIFICATION COVERING CORROSION- AND HEAT-RESISTANT NICKEL-BASE ALLOY INVESTMENT CASTINGS. THE CURRENT SPECIFICATION IS: SAE AMS 5377H — NICKEL ALLOY, CORROSION- AND HEAT-RESISTANT, INVESTMENT CASTINGS, 73NI-12CR-4.5MO-2.0CB(NB)-0.70TI-0.05C-6.0AL-0.010-0.10ZR (IN-713 – LOW CARBON), VACUUM CAST, AS-CAST. SAE RECORDS SHOW THAT THE SPECIFICATION ORIGINATED IN 1971 AND HAS PROGRESSED THROUGH REVISIONS A, B, C, D, E, F, G AND H. REVISION H WAS PUBLISHED ON JULY 18, 2025. AMS 5377 REVISION HISTORY AMS 5377 STATUS / DATE: ISSUED MAY 1971 AMS 5377A STATUS / DATE: 1978 AMS 5377B STATUS / DATE: OCTOBER 1985 AMS 5377C STATUS / DATE: OCTOBER 1988 AMS 5377D STATUS / DATE: APRIL 1995 AMS 5377E STATUS / DATE: JUNE 1996 AMS 5377F STATUS / DATE: NOVEMBER 2004 AMS 5377G STATUS / DATE: REVISED DECEMBER 2013; REAFFIRMED JULY 2019 AMS 5377H STATUS / DATE: REVISED JULY 18, 2025 THE HISTORICAL DOCUMENTS CONSISTENTLY IDENTIFY THE PRODUCT FORM AS INVESTMENT CASTINGS, NOT CONVENTIONAL WROUGHT BAR. AMS 5377 MATERIAL IDENTIFICATION THE MATERIAL IS FREQUENTLY ENCOUNTERED UNDER SEVERAL NAMES. PRIMARY NAMES • AMS 5377 • AMS 5377H • AMS5377 • AMS5377H • IN-713LC • IN 713 LC • IN713LC • ALLOY 713LC • 713LC • INCONEL 713LC • INCONEL 713LC • NICKEL ALLOY 713LC • NICKEL-BASED SUPERALLOY 713LC • LOW-CARBON IN-713 • LOW-CARBON INCONEL 713 • 713 LC NICKEL ALLOY THE NICKEL INSTITUTE LISTS ALLOY 713LC (C) UNDER UNS N07713. UNS NUMBER AND INTERNATIONAL MATERIAL EQUIVALENTS ONE OF THE MOST IMPORTANT INTERNATIONAL IDENTIFIERS ASSOCIATED WITH THE 713 FAMILY IS: UNS N07713 HOWEVER, INTERNATIONAL EQUIVALENCY TABLES CAN CONTAIN DISTINCTIONS BETWEEN IN-713, IN-713C AND IN-713LC. THEREFORE, A CLAIMED “EQUIVALENT” SHOULD NEVER AUTOMATICALLY BE CONSIDERED IDENTICAL FOR CERTIFICATION PURPOSES. REPORTED INTERNATIONAL DESIGNATIONS INCLUDE: SYSTEM / COUNTRY - DESIGNATION / REFERENCE USA / SAE AMS 5377 / AMS 5377H USA / UNS N07713 USA / TRADE NAME: IN-713LC / INCONEL 713LC GERMANY / WL 2.4670 / 2.4671 REFERENCES ARE REPORTED IN EQUIVALENCY DATABASES UNITED KINGDOM: HC203 IS REPORTED AS AN INDIRECT/IMPLICIT EQUIVALENT EUROPE: NI-C98-HT IS REPORTED AS AN INDIRECT/IMPLICIT COMPARISON IN SOME DATABASES CHINA: GH713 / GH713LC REFERENCES APPEAR IN SUPPLIER MATERIAL SYSTEMS GENERIC TRADE: ALLOY 713LC / 713LC / IN713LC TOTAL MATERIA REPORTS N07713 AS AN OFFICIAL EQUIVALENT FOR SAE IN-713LC AND LISTS ADDITIONAL INTERNATIONAL COMPARISONS, WHILE EMPHASIZING EQUIVALENCY CATEGORIES RATHER THAN TREATING EVERY DESIGNATION AS AN EXACT ONE-TO-ONE SPECIFICATION. IMPORTANT PURCHASING WARNING DO NOT SUBSTITUTE A MATERIAL MERELY BECAUSE A SUPPLIER DESCRIBES IT AS “EQUIVALENT TO AMS 5377.” THE PURCHASER SHOULD COMPARE: 1. CHEMICAL COMPOSITION, 2. PRODUCT FORM, 3. CASTING PROCESS, 4. HEAT TREATMENT, 5. MECHANICAL REQUIREMENTS, 6. INSPECTION REQUIREMENTS, 7. TEST REQUIREMENTS, 8. APPLICABLE REVISION, 9. CERTIFICATE REQUIREMENTS, 10. AND END-USE APPROVAL. AMS 5377 CHEMICAL COMPOSITION AMS 5377H IDENTIFIES THE ALLOY USING A NOMINAL CHEMISTRY BASED AROUND NICKEL, CHROMIUM, MOLYBDENUM, NIOBIUM/COLUMBIUM, TITANIUM AND ALUMINUM. THE SPECIFICATION TITLE ITSELF IDENTIFIES THE NOMINAL ALLOY AS: • NICKEL — APPROXIMATELY 73% • CHROMIUM — APPROXIMATELY 12% • MOLYBDENUM — APPROXIMATELY 4.5% • NIOBIUM/COLUMBIUM — APPROXIMATELY 2.0% • TITANIUM — APPROXIMATELY 0.70% • CARBON — APPROXIMATELY 0.05% • ALUMINUM — APPROXIMATELY 6.0% • BORON — CONTROLLED AT VERY LOW LEVEL • ZIRCONIUM — APPROXIMATELY 0.10% THE EXACT PERMISSIBLE LIMITS MUST BE TAKEN FROM THE CURRENT PURCHASED EDITION OF AMS 5377H, RATHER THAN FROM AN UNOFFICIAL WEBSITE OR GENERIC MATERIAL TABLE. PUBLISHED TECHNICAL MATERIAL TABLES FOR IN-713LC COMMONLY SHOW APPROXIMATELY: ELEMENT - TYPICAL REPORTED RANGE, WT.% NICKEL BALANCE CHROMIUM 11–13 MOLYBDENUM 3.8–5.2 NIOBIUM 1.5–2.5 TITANIUM 0.5–0.9 ALUMINUM 5.5–6.5 CARBON 0.03–0.07 ZIRCONIUM 0.05–0.15 MANGANESE ≤0.25 SILICON ≤0.50 A PUBLISHED TECHNICAL TABLE SPECIFICALLY IDENTIFIES THESE VALUES AS THE COMPOSITION OF IN-713LC ACCORDING TO SAE AMS 5377. WHY LOW CARBON IS IMPORTANT IN IN-713LC THE “LC” IN IN-713LC REFERS TO THE LOW-CARBON VERSION OF THE ALLOY. REDUCING CARBON RELATIVE TO HIGHER-CARBON VARIANTS CAN IMPROVE CHARACTERISTICS IMPORTANT TO INVESTMENT-CAST COMPONENTS, INCLUDING DUCTILITY AND RESISTANCE TO CERTAIN FORMS OF CASTING-RELATED CRACKING AND DEGRADATION. THIS IS ONE REASON THAT IN-713LC AND IN-713C SHOULD NOT AUTOMATICALLY BE TREATED AS INTERCHANGEABLE GRADES. THE MARKET CONTAINS MANY OVERLAPPING SEARCH TERMS: • INCONEL 713 • INCONEL 713C • INCONEL 713LC • ALLOY 713C • ALLOY 713LC • IN-713 • IN-713C • IN-713LC YET THESE DESIGNATIONS CAN CORRESPOND TO DIFFERENT CHEMISTRY LIMITS AND SPECIFICATIONS. AMS 5377 ROUND BAR MANUFACTURING PROCESS BECAUSE AMS 5377 IS FUNDAMENTALLY AN INVESTMENT-CASTING SPECIFICATION, MANUFACTURING AN “AMS 5377 ROUND BAR” IS BETTER UNDERSTOOD AS PRODUCING CAST IN-713LC STOCK OR A CAST TEST BAR, FOLLOWED BY MACHINING OR FINISHING AS REQUIRED. A TYPICAL MANUFACTURING ROUTE CONSISTS OF: 1) RAW MATERIAL SELECTION HIGH-PURITY NICKEL-BASE CHARGE MATERIALS ARE SELECTED ACCORDING TO THE REQUIRED CHEMISTRY. TYPICAL CHARGE MATERIALS INCLUDE: • NICKEL, • CHROMIUM, • MOLYBDENUM, • ALUMINUM, • TITANIUM, • NIOBIUM, • ZIRCONIUM, • BORON-BEARING ADDITIONS, • AND CONTROLLED MASTER ALLOYS. ALL INCOMING MATERIALS SHOULD BE POSITIVELY IDENTIFIED AND TRACEABLE. 2) VACUUM MELTING VACUUM MELTING IS A KEY PART OF THE AMS 5377 MANUFACTURING ROUTE. VACUUM PROCESSING HELPS CONTROL: • ATMOSPHERIC CONTAMINATION, • OXIDATION, • DISSOLVED GASES, • INCLUSIONS, • REACTIVE ALLOYING ELEMENTS, • AND OVERALL MELT CLEANLINESS. AMS 5377 SPECIFICALLY IDENTIFIES THE MATERIAL AS VACUUM CAST. FOR AEROSPACE-GRADE NICKEL SUPERALLOYS, MELT PRACTICE AND CHARGE CONTROL ARE PARTICULARLY IMPORTANT BECAUSE SMALL VARIATIONS IN REACTIVE ELEMENTS CAN INFLUENCE SOLIDIFICATION BEHAVIOR AND FINAL PROPERTIES. 3) CHEMICAL ANALYSIS BEFORE CASTING, THE MOLTEN ALLOY IS SAMPLED AND ANALYZED. COMMON ANALYTICAL METHODS INCLUDE: • OPTICAL EMISSION SPECTROSCOPY, • X-RAY FLUORESCENCE WHERE APPROPRIATE, • COMBUSTION ANALYSIS FOR CARBON, • INERT-GAS FUSION TECHNIQUES FOR OXYGEN/NITROGEN, • LABORATORY WET CHEMISTRY WHERE REQUIRED. THE FINAL CHEMISTRY MUST BE COMPARED AGAINST THE REQUIREMENTS OF THE APPLICABLE AMS REVISION. 4) INVESTMENT PATTERN MANUFACTURING INVESTMENT CASTING BEGINS WITH A DIMENSIONAL PATTERN REPRESENTING THE REQUIRED COMPONENT OR TEST STOCK. THE PROCESS CAN INVOLVE: 1. WAX OR POLYMER PATTERN PRODUCTION, 2. PATTERN INSPECTION, 3. ASSEMBLY, 4. CERAMIC SHELL FORMATION, 5. DRYING, 6. DEWAXING, 7. SHELL FIRING, 8. PREHEATING, 9. VACUUM CASTING. INVESTMENT CASTING IS PARTICULARLY VALUABLE FOR COMPLEX NICKEL-SUPERALLOY GEOMETRIES BECAUSE IT CAN MINIMIZE MACHINING AND ENABLE INTRICATE SHAPES. 5) CERAMIC SHELL PREPARATION THE CERAMIC SHELL MUST WITHSTAND THE HIGH TEMPERATURE OF MOLTEN NICKEL ALLOY. MULTIPLE COATING AND STUCCO LAYERS CAN BE APPLIED TO DEVELOP THE REQUIRED: • SHELL STRENGTH, • PERMEABILITY, • DIMENSIONAL STABILITY, • SURFACE QUALITY, • AND THERMAL RESISTANCE. SHELL QUALITY DIRECTLY INFLUENCES THE SURFACE CONDITION OF THE FINISHED CASTING. 6) VACUUM CASTING THE PREPARED CERAMIC MOLD IS BROUGHT TO THE REQUIRED CASTING TEMPERATURE. THE IN-713LC MELT IS THEN INTRODUCED UNDER CONTROLLED VACUUM CONDITIONS. CRITICAL VARIABLES INCLUDE: • MELT TEMPERATURE, • MOLD TEMPERATURE, • POURING RATE, • VACUUM LEVEL, • SOLIDIFICATION RATE, • MOLD THERMAL GRADIENT, • ALLOY CLEANLINESS. POOR CONTROL CAN PRODUCE: • SHRINKAGE, • GAS POROSITY, • INCLUSIONS, • HOT TEARS, • MISRUNS, • COLD SHUTS, • SURFACE DEFECTS, • SEGREGATION, • AND DIMENSIONAL VARIATION. SOLIDIFICATION AND MICROSTRUCTURE CONTROL IN-713LC IS A PRECIPITATION-STRENGTHENED NICKEL-BASE CASTING SUPERALLOY. ITS HIGH-TEMPERATURE PROPERTIES DEPEND STRONGLY ON ITS MICROSTRUCTURE. IMPORTANT CONSTITUENTS INCLUDE THE NICKEL-RICH GAMMA MATRIX AND STRENGTHENING GAMMA-PRIME PHASE. THE ALUMINUM AND TITANIUM ADDITIONS CONTRIBUTE TO PRECIPITATION STRENGTHENING, WHILE CHROMIUM, MOLYBDENUM AND OTHER ALLOYING ADDITIONS CONTRIBUTE TO HIGH-TEMPERATURE AND ENVIRONMENTAL PERFORMANCE. MANUFACTURING CONTROL MUST THEREFORE CONSIDER: • DENDRITE MORPHOLOGY, • INTERDENDRITIC SEGREGATION, • GAMMA-PRIME DISTRIBUTION, • CARBIDE FORMATION, • POROSITY, • INCLUSIONS, • GRAIN STRUCTURE, • AND COOLING RATE. CASTING DEFECTS TO CONTROL IN AMS 5377 MATERIAL A HIGH-QUALITY MANUFACTURER SHOULD HAVE PROCEDURES FOR CONTROLLING AND DETECTING: SHRINKAGE POROSITY CAN RESULT FROM INADEQUATE FEEDING DURING SOLIDIFICATION. GAS POROSITY CAN ARISE FROM GAS CONTAMINATION OR INADEQUATE VACUUM/MELT CONTROL. INCLUSIONS MAY ORIGINATE FROM: • RAW MATERIALS, • REFRACTORY INTERACTION, • CERAMIC SHELL BREAKDOWN, • MELTING PRACTICE, • OR POOR PROCESS CONTROL. HOT TEARING CAN OCCUR BECAUSE OF THERMAL CONTRACTION AND INTERDENDRITIC STRESS DURING SOLIDIFICATION. COLD SHUTS AND MISRUNS USUALLY ASSOCIATED WITH INADEQUATE METAL FLUIDITY OR UNSUITABLE MOLD/MELT TEMPERATURES. SURFACE DEFECTS CAN RESULT FROM: • SHELL CRACKING, • SHELL-METAL REACTIONS, • PATTERN DEFECTS, • POOR SHELL PERMEABILITY, • OR HANDLING DAMAGE. AMS 5377 ROUND BAR MACHINING IN-713LC IS A HIGH-STRENGTH NICKEL-BASED SUPERALLOY AND CAN BE DIFFICULT TO MACHINE COMPARED WITH CONVENTIONAL STAINLESS STEELS. MACHINING CONSIDERATIONS INCLUDE: • RIGID MACHINE SETUP, • CARBIDE OR ADVANCED CUTTING TOOLS, • CONTROLLED CUTTING SPEED, • ADEQUATE FEED, • APPROPRIATE DEPTH OF CUT, • HIGH-PRESSURE COOLANT WHERE SUITABLE, • MINIMIZED WORK HARDENING, • SHARP TOOLING, • STABLE FIXTURING. MACHINING OPERATIONS CAN INCLUDE: • TURNING, • FACING, • CENTER DRILLING, • DRILLING, • BORING, • MILLING, • GRINDING, • CENTERLESS GRINDING, • THREAD MACHINING, • DIMENSIONAL FINISHING. IF A SUPPLIER ADVERTISES AMS 5377 ROUND BAR, THE BUYER SHOULD ASK WHETHER THE MATERIAL IS ACTUALLY: CAST ROUND STOCK → MACHINED, OR A GENUINE WROUGHT BAR MANUFACTURED TO A SEPARATE BAR SPECIFICATION. AMS 5377 SURFACE FINISHING DEPENDING ON THE COMMERCIAL PRODUCT, CAST STOCK MAY BE SUPPLIED WITH: • AS-CAST SURFACE, • MACHINED SURFACE, • TURNED SURFACE, • GROUND SURFACE, • POLISHED SURFACE. FOR PRECISION AEROSPACE COMPONENTS, GRINDING OR MACHINING MAY BE USED TO OBTAIN FINAL DIMENSIONAL TOLERANCES. SURFACE INSPECTION MAY INCLUDE: • VISUAL INSPECTION, • DIMENSIONAL INSPECTION, • PENETRANT TESTING, • ROUGHNESS MEASUREMENT, • METALLOGRAPHIC EXAMINATION. INSPECTION AND QUALITY CONTROL HIGH-QUALITY AMS 5377 PRODUCTION SHOULD USE A DOCUMENTED INSPECTION SYSTEM. TYPICAL CONTROLS CAN INCLUDE: CHEMICAL INSPECTION CONFIRM THE ALLOY MEETS THE SPECIFIED CHEMISTRY. DIMENSIONAL INSPECTION CHECK: • OUTSIDE DIAMETER, • STRAIGHTNESS, • LENGTH, • ROUNDNESS, • CONCENTRICITY, • SURFACE CONDITION. VISUAL INSPECTION CHECK FOR: • CRACKS, • LAPS, • PITS, • INCLUSIONS, • CASTING IMPERFECTIONS, • MACHINING DAMAGE. NONDESTRUCTIVE TESTING DEPENDING ON PURCHASE REQUIREMENTS AND COMPONENT DESIGN, METHODS CAN INCLUDE: • LIQUID PENETRANT TESTING, • RADIOGRAPHIC TESTING, • ULTRASONIC TESTING, • MAGNETIC PARTICLE INSPECTION WHERE TECHNICALLY APPLICABLE. FOR A NICKEL-BASED NON-FERROMAGNETIC ALLOY, LIQUID PENETRANT AND RADIOGRAPHIC METHODS CAN BE ESPECIALLY RELEVANT TO CASTING INSPECTION. MECHANICAL PROPERTIES OF IN-713LC PUBLISHED COMMERCIAL MATERIAL DATA FOR IN-713LC COMMONLY REPORT ROOM-TEMPERATURE TENSILE STRENGTH AROUND 758 MPA MINIMUM AND YIELD STRENGTH AROUND 689 MPA MINIMUM, WITH ELONGATION REQUIREMENTS DEPENDING ON THE APPLICABLE PRODUCT/SPECIFICATION CONDITION. SOME PUBLISHED SUPPLIER DATA ALSO REPORT STRESS-RUPTURE TESTING AT APPROXIMATELY 1800°F / 982°C UNDER SPECIFIED LOADING CONDITIONS. HOWEVER, MECHANICAL-PROPERTY VALUES SHOULD NOT BE COPIED FROM A GENERIC SUPPLIER PAGE AND PRESENTED AS UNIVERSAL AMS 5377 REQUIREMENTS. FOR AEROSPACE PROCUREMENT, THE CONTROLLING VALUES SHOULD ALWAYS BE TAKEN FROM THE APPLICABLE EDITION OF AMS 5377 AND THE PURCHASE ORDER. HIGH-TEMPERATURE PERFORMANCE IN-713LC IS USED WHERE CONVENTIONAL STEELS AND LOWER-ALLOY MATERIALS CANNOT PROVIDE SUFFICIENT PERFORMANCE AT ELEVATED TEMPERATURE. ITS IMPORTANT CHARACTERISTICS INCLUDE: • HIGH-TEMPERATURE STRENGTH, • CREEP RESISTANCE, • STRESS-RUPTURE RESISTANCE, • OXIDATION RESISTANCE, • THERMAL FATIGUE RESISTANCE, • GOOD CASTING CHARACTERISTICS, • PRECIPITATION STRENGTHENING, • RESISTANCE TO HIGH-TEMPERATURE DEFORMATION. THIS MAKES THE ALLOY PARTICULARLY ATTRACTIVE FOR HOT-SECTION COMPONENTS. AMS 5377 / IN-713LC APPLICATIONS COMMON APPLICATIONS ASSOCIATED WITH IN-713LC INCLUDE: • GAS TURBINE COMPONENTS, • TURBINE BLADES, • TURBINE VANES, • TURBOCHARGER COMPONENTS, • AEROSPACE HOT-SECTION COMPONENTS, • POWER-GENERATION EQUIPMENT, • INDUSTRIAL GAS TURBINES, • HIGH-TEMPERATURE ENGINE COMPONENTS, • COMBUSTION-SYSTEM HARDWARE, • HEAT-RESISTANT CAST COMPONENTS. INVESTMENT CASTING IS PARTICULARLY USEFUL WHERE COMPLICATED GEOMETRY AND HIGH-TEMPERATURE PERFORMANCE MUST BE COMBINED. AEROSPACE APPLICATIONS THE AEROSPACE INDUSTRY PLACES DEMANDING REQUIREMENTS ON NICKEL SUPERALLOYS. IN-713LC CAN BE SELECTED FOR APPLICATIONS WHERE COMPONENTS EXPERIENCE: • ELEVATED TEMPERATURE, • CYCLIC HEATING, • CENTRIFUGAL LOADING, • OXIDATION, • THERMAL GRADIENTS, • CREEP, • VIBRATION, • AND PROLONGED SERVICE EXPOSURE. THE MATERIAL IS THEREFORE COMMONLY ASSOCIATED WITH AEROSPACE AND TURBINE MANUFACTURING TERMINOLOGY. AMS 5377 VS AMS 5391 VS OTHER 713 GRADES ONE OF THE MOST IMPORTANT AND TECHNICAL DISTINCTIONS IS BETWEEN AMS 5377 AND OTHER SPECIFICATIONS ASSOCIATED WITH THE 713 FAMILY. INDUSTRIAL MATERIAL DATABASES IDENTIFY IN-713LC WITH AMS 5377, WHILE IN-713C IS COMMONLY ASSOCIATED WITH SEPARATE AMS SPECIFICATIONS SUCH AS AMS 5391. THEREFORE: IN-713LC COMMON DESIGNATION: ALLOY 713LC COMMON SPECIFICATION REFERENCE: AMS 5377 IN-713C COMMON DESIGNATION: INCONEL 713C COMMON SPECIFICATION REFERENCE: AMS 5391 AND RELATED SPECIFICATIONS IN-713 FAMILY COMMON DESIGNATION: NICKEL-BASE CASTING SUPERALLOY COMMON SPECIFICATION REFERENCE: MULTIPLE SPECIFICATIONS DEPENDING ON GRADE/PRODUCT FORM DO NOT USE AMS 5391 AND AMS 5377 INTERCHANGEABLY. INCONEL 713LC VS INCONEL 713C THE TWO GRADES ARE FREQUENTLY CONFUSED ONLINE. INCONEL 713LC • LOW-CARBON VERSION • ASSOCIATED WITH AMS 5377 • STRONG HIGH-TEMPERATURE CASTING ALLOY • COMMONLY IDENTIFIED AS IN-713LC • UNS N07713 IS REPORTED FOR THE 713 FAMILY INCONEL 713C • HIGHER-CARBON VARIANT • COMMONLY ASSOCIATED WITH AMS 5391 • ALSO A NICKEL-BASE INVESTMENT-CASTING SUPERALLOY • FREQUENTLY IDENTIFIED AS UNS N07713 • USED FOR HIGH-TEMPERATURE TURBINE AND ENGINE APPLICATIONS BECAUSE BOTH CAN APPEAR UNDER THE UNS N07713 DESIGNATION IN COMMERCIAL LITERATURE, THE GOVERNING AMS SPECIFICATION AND CHEMISTRY ARE ESSENTIAL FOR DISTINGUISHING THE SUPPLIED GRADE. INTERNATIONAL EQUIVALENT NAMES AND TRADE TERMINOLOGY FOR INTERNATIONAL AND PROCUREMENT SEARCHES, MANUFACTURERS SHOULD RECOGNIZE THE FOLLOWING EXPRESSIONS: UNITED STATES • AMS 5377 • AMS 5377H • AMS5377 • AMS5377H • IN-713LC • IN 713 LC • ALLOY 713LC • 713LC • INCONEL 713LC • UNS N07713 EUROPE • IN-713LC • 713LC • NICKEL-BASE CASTING SUPERALLOY • NICKEL SUPERALLOY • 2.4670 / 2.4671 REFERENCES IN INTERNATIONAL EQUIVALENCY DATABASES UNITED KINGDOM • HC203 IS REPORTED AS AN INDIRECT/IMPLICIT COMPARISON IN SOME INTERNATIONAL MATERIAL DATABASES. CHINA SEARCH TERMINOLOGY CAN INCLUDE: • GH713 • GH713LC • 镍基高温合金 • 镍基铸造高温合金 • 713LC镍基合金 HOWEVER, CHINESE GRADES SHOULD BE VERIFIED AGAINST THE APPLICABLE GB/T STANDARD RATHER THAN ASSUMED IDENTICAL SOLELY FROM THE DESIGNATION. RUSSIA / CIS POTENTIAL TRADE SEARCHES MAY INCLUDE: • 713LC • NICKEL-BASE CASTING SUPERALLOY • ЖС13 / ВЖЛ13-RELATED 713-FAMILY SEARCHES THESE SHOULD BE TREATED AS COMPARATIVE TRADE TERMINOLOGY RATHER THAN AUTOMATIC SPECIFICATION EQUIVALENCE. BRAND NAMES AND COMMERCIAL NAMES THE MOST RECOGNIZABLE COMMERCIAL NAME IN THIS ALLOY FAMILY IS: INCONEL INCONEL IS A REGISTERED TRADEMARK ASSOCIATED WITH SPECIAL METALS AND ITS CORPORATE HISTORY. COMMERCIAL LISTINGS MAY THEREFORE USE: • INCONEL 713 • INCONEL 713C • INCONEL 713LC • INCONEL ALLOY 713LC • ALLOY 713LC • IN-713LC A SUPPLIER'S USE OF THE WORD “INCONEL” SHOULD NOT REPLACE THE REQUIREMENT TO IDENTIFY THE EXACT GRADE AND SPECIFICATION. ASTM STANDARDS AND THE AMS 5377 CONFUSION A MAJOR SOURCE OF CONFUSION IN ONLINE SEARCHES IS THE ASSUMPTION THAT EVERY INCONEL ROUND BAR IS COVERED BY ASTM B637. ASTM STANDARDS COVER PARTICULAR PRODUCT FORMS AND ALLOY CONDITIONS, AND A CASTING SPECIFICATION SHOULD NOT AUTOMATICALLY BE SUBSTITUTED WITH A WROUGHT-PRODUCT STANDARD. SOME COMMERCIAL SOURCES LIST ASTM B637 ALONGSIDE INCONEL 713-FAMILY PRODUCTS, BUT THE EXACT APPLICABILITY MUST BE CHECKED AGAINST THE ALLOY, PRODUCT FORM AND EDITION OF THE ASTM SPECIFICATION. PROCUREMENT RULE IF THE REQUIREMENT SAYS: “AMS 5377 ROUND BAR” THE MANUFACTURER SHOULD CONFIRM: 1. IS THE MATERIAL CAST OR WROUGHT? 2. IS THE PRODUCT A TEST BAR OR COMMERCIAL ROUND STOCK? 3. IS AMS 5377H SPECIFICALLY REQUIRED? 4. IS A SEPARATE DIMENSIONAL BAR SPECIFICATION REQUIRED? 5. IS HEAT TREATMENT REQUIRED? 6. ARE NDT REQUIREMENTS INCLUDED? 7. IS AEROSPACE TRACEABILITY REQUIRED? RECOMMENDED MANUFACTURING ROUTE FOR AMS 5377 CAST ROUND STOCK A ROBUST PRODUCTION FLOW CAN BE SUMMARIZED AS: RAW MATERIAL INSPECTION → CHARGE PREPARATION → VACUUM MELTING → CHEMICAL ANALYSIS → INVESTMENT PATTERN → CERAMIC SHELL → DEWAXING → SHELL FIRING → VACUUM CASTING → CONTROLLED SOLIDIFICATION → SHAKEOUT → CUTOFF → CLEANING → HEAT TREATMENT IF CONTRACTUALLY REQUIRED → NDT → MACHINING → GRINDING → DIMENSIONAL INSPECTION → FINAL CHEMICAL/MECHANICAL VERIFICATION → CERTIFICATION → PACKAGING THIS PROCESS SHOULD BE ADAPTED TO THE EXACT REQUIREMENTS OF THE CURRENT AMS SPECIFICATION AND CUSTOMER PURCHASE ORDER. QUALITY CERTIFICATES FOR AMS 5377 MATERIAL INTERNATIONAL BUYERS COMMONLY REQUEST DOCUMENTATION SUCH AS: • MATERIAL TEST CERTIFICATE • MILL TEST CERTIFICATE • CERTIFICATE OF ANALYSIS • CERTIFICATE OF CONFORMANCE • CHEMICAL ANALYSIS REPORT • MECHANICAL TEST REPORT • HEAT/BATCH TRACEABILITY • NDT REPORT • DIMENSIONAL INSPECTION REPORT • RAW MATERIAL CERTIFICATE • INSPECTION CERTIFICATE • EN 10204 3.1 DOCUMENTATION WHERE CONTRACTUALLY APPLICABLE EN 10204 IS A CERTIFICATION/DOCUMENTATION STANDARD, NOT AN ALTERNATIVE MATERIAL GRADE. A MANUFACTURER SHOULD THEREFORE AVOID STATING “EN 10204 3.1 AMS 5377” AS THOUGH EN 10204 DEFINES THE ALLOY. IT DEFINES THE TYPE OF INSPECTION DOCUMENT SUPPLIED. AMS 5377 ROUND BAR SIZE TERMINOLOGY GLOBAL BUYERS MAY SEARCH FOR: • AMS 5377 ROUND BAR • AMS 5377 BAR • AMS5377 BAR • AMS 5377 ROD • IN-713LC ROUND BAR • INCONEL 713LC ROUND BAR • INCONEL 713LC BAR • ALLOY 713LC ROUND BAR • UNS N07713 ROUND BAR • 713LC ROD • NICKEL ALLOY ROUND BAR • NICKEL SUPERALLOY BAR • NICKEL ALLOY ROD • HIGH-TEMPERATURE ALLOY BAR • TURBINE ALLOY BAR • AEROSPACE NICKEL BAR WHEN ADVERTISING SIZES, SUPPLIERS SHOULD STATE WHETHER THE DIAMETER IS: • AS-CAST, • ROUGH-MACHINED, • TURNED, • GROUND, • OR FINISHED. COMMON GLOBAL SEARCH KEYWORDS FOR AMS 5377 A STRONG INTERNATIONAL STRATEGY CAN TARGET SEVERAL KEYWORD CLUSTERS. PRIMARY KEYWORDS • AMS 5377 • AMS 5377H • AMS5377 • AMS5377H • AMS 5377 ROUND BAR • AMS 5377 BAR • AMS 5377 MATERIAL • AMS 5377 SPECIFICATION • AMS 5377 ALLOY • AMS 5377 INVESTMENT CASTING INCONEL KEYWORDS • INCONEL 713LC • INCONEL 713LC ROUND BAR • INCONEL 713LC BAR • INCONEL 713LC ROD • INCONEL 713LC MATERIAL • INCONEL 713LC SPECIFICATION • INCONEL 713LC SUPPLIER • INCONEL 713LC MANUFACTURER • INCONEL 713LC PRICE • INCONEL 713LC EQUIVALENT ALLOY KEYWORDS • IN-713LC • IN 713 LC • ALLOY 713LC • ALLOY 713 LC • 713LC ALLOY • 713LC ROUND BAR • 713LC BAR • 713LC ROD • NICKEL ALLOY 713LC • NICKEL SUPERALLOY 713LC UNS KEYWORDS • UNS N07713 • N07713 ROUND BAR • N07713 BAR • N07713 EQUIVALENT • N07713 MATERIAL • N07713 SPECIFICATION • UNS N07713 INCONEL • UNS N07713 713LC INDUSTRIAL KEYWORDS • NICKEL ALLOY ROUND BAR • NICKEL SUPERALLOY ROUND BAR • HIGH TEMPERATURE ALLOY BAR • HEAT RESISTANT NICKEL ALLOY • AEROSPACE NICKEL ALLOY • TURBINE ALLOY • TURBINE BLADE ALLOY • GAS TURBINE MATERIAL • INVESTMENT CASTING ALLOY • NICKEL BASED SUPERALLOY LONG-TAIL KEYWORDS HIGH-INTENT LONG-TAIL PHRASES INCLUDE: • AMS 5377 ROUND BAR MANUFACTURER • AMS 5377 ROUND BAR SUPPLIER • AMS 5377 ROUND BAR EXPORTER • AMS 5377H MATERIAL SUPPLIER • AMS 5377 INVESTMENT CASTING MANUFACTURER • AMS 5377 INVESTMENT CASTING SUPPLIER • INCONEL 713LC ROUND BAR MANUFACTURER • INCONEL 713LC ROUND BAR SUPPLIER • INCONEL 713LC BAR EXPORTER • IN-713LC ROUND BAR SUPPLIER • UNS N07713 ROUND BAR MANUFACTURER • UNS N07713 NICKEL ALLOY SUPPLIER • 713LC NICKEL ALLOY MANUFACTURER • 713LC INVESTMENT CASTING MANUFACTURER • 713LC TURBINE BLADE MATERIAL • HIGH TEMPERATURE NICKEL ALLOY ROUND BAR • AEROSPACE NICKEL ALLOY ROUND BAR • NICKEL SUPERALLOY INVESTMENT CASTING MANUFACTURER • CORROSION RESISTANT HEAT RESISTANT NICKEL ALLOY • NICKEL ALLOY TURBINE COMPONENT MANUFACTURER BUYER SEARCH INTENT KEYWORDS COMMERCIAL BUYERS FREQUENTLY SEARCH AROUND: • AMS 5377 PRICE • AMS 5377 COST • AMS 5377 SUPPLIER • AMS 5377 MANUFACTURER • AMS 5377 STOCKIST • AMS 5377 DISTRIBUTOR • AMS 5377 EXPORTER • AMS 5377 AVAILABILITY • AMS 5377 QUOTATION • AMS 5377 SPECIFICATION PDF • AMS 5377 CHEMICAL COMPOSITION • AMS 5377 MECHANICAL PROPERTIES • AMS 5377 EQUIVALENT • AMS 5377 MATERIAL CERTIFICATE • AMS 5377 TEST CERTIFICATE FOR PURPOSES, THESE COMMERCIAL-INTENT KEYWORDS ARE OFTEN MORE VALUABLE TO AN INDUSTRIAL MANUFACTURER THAN GENERIC INFORMATIONAL TERMS. AMS 5377 MANUFACTURING: ADVANTAGES IN-713LC OFFERS SEVERAL CHARACTERISTICS THAT MAKE IT VALUABLE FOR HIGH-TEMPERATURE CAST COMPONENTS. HIGH-TEMPERATURE STRENGTH THE PRECIPITATION-STRENGTHENED NICKEL MATRIX PROVIDES STRENGTH AT ELEVATED TEMPERATURES. CREEP RESISTANCE THE ALLOY IS DESIGNED FOR APPLICATIONS WHERE COMPONENTS EXPERIENCE PROLONGED HIGH-TEMPERATURE LOADING. OXIDATION RESISTANCE CHROMIUM AND ALUMINUM CONTRIBUTE TO RESISTANCE AGAINST HIGH-TEMPERATURE OXIDATION. INVESTMENT CASTABILITY THE ALLOY CAN BE USED FOR COMPLEX INVESTMENT-CAST GEOMETRIES. THERMAL STABILITY ITS MICROSTRUCTURE IS DESIGNED FOR DEMANDING HIGH-TEMPERATURE SERVICE. AEROSPACE SUITABILITY THE MATERIAL IS ASSOCIATED WITH TURBINE AND AEROSPACE APPLICATIONS WHERE HIGH-TEMPERATURE PERFORMANCE IS ESSENTIAL. LIMITATIONS OF AMS 5377 AMS 5377/IN-713LC SHOULD NOT BE SELECTED SOLELY BECAUSE IT IS AN “INCONEL” GRADE. POTENTIAL LIMITATIONS INCLUDE: • DIFFICULT MACHINING, • RELATIVELY HIGH RAW-MATERIAL COST, • DEMANDING MELTING REQUIREMENTS, • STRICT CASTING-PROCESS CONTROL, • SENSITIVITY TO CASTING DEFECTS, • SPECIALIZED INSPECTION REQUIREMENTS, • SPECIFICATION-SPECIFIC CERTIFICATION REQUIREMENTS. THE CORRECT GRADE MUST ALWAYS BE SELECTED ACCORDING TO SERVICE TEMPERATURE, STRESS, ENVIRONMENT, GEOMETRY AND REQUIRED LIFE. HOW TO ORDER AMS 5377 ROUND BAR A PROFESSIONAL PURCHASE SPECIFICATION SHOULD INCLUDE: MATERIAL: IN-713LC / ALLOY 713LC SPECIFICATION: SAE AMS 5377H PRODUCT FORM: CAST ROUND STOCK / CAST TEST BAR / INVESTMENT CASTING DIAMETER: REQUIRED FINISHED OR ROUGH SIZE LENGTH: REQUIRED LENGTH CONDITION: AS-CAST OR AGREED CONDITION HEAT TREATMENT: IF REQUIRED SURFACE: MACHINED / TURNED / GROUND / AS-CAST TESTING: CHEMICAL, TENSILE, HARDNESS, NDT AS APPLICABLE CERTIFICATION: CERTIFICATE OF CONFORMITY AND REQUIRED INSPECTION DOCUMENTATION TRACEABILITY: HEAT/LOT/BATCH IDENTIFICATION PACKAGING: EXPORT-STANDARD PACKAGING THIS REMOVES AMBIGUITY BETWEEN CAST 713LC AND A CONVENTIONAL WROUGHT NICKEL-ALLOY BAR. FREQUENTLY ASKED QUESTIONS IS AMS 5377 A ROUND BAR STANDARD? NO. SAE DEFINES AMS 5377 AS AN INVESTMENT-CASTING MATERIAL SPECIFICATION. PRODUCTS SOLD COMMERCIALLY AS “AMS 5377 ROUND BAR” SHOULD THEREFORE BE CLEARLY IDENTIFIED AS CAST STOCK, CAST BAR OR ANOTHER SPECIFICALLY AGREED PRODUCT FORM. WHAT ALLOY IS AMS 5377? AMS 5377 COVERS A CORROSION- AND HEAT-RESISTANT NICKEL ALLOY ASSOCIATED WITH IN-713 LOW CARBON / IN-713LC. WHAT IS THE UNS NUMBER OF 713LC? UNS N07713 IS LISTED FOR ALLOY 713LC BY THE NICKEL INSTITUTE. IS AMS 5377 THE SAME AS INCONEL 713LC? AMS 5377 IS THE SAE SPECIFICATION ASSOCIATED WITH THE LOW-CARBON IN-713 ALLOY. INCONEL 713LC IS A COMMERCIAL/TRADE DESIGNATION USED FOR THIS ALLOY FAMILY. IS AMS 5377 THE SAME AS AMS 5391? NO. AMS 5377 AND AMS 5391 ARE DIFFERENT SPECIFICATIONS ASSOCIATED WITH DIFFERENT 713-FAMILY MATERIAL DESIGNATIONS/CHEMISTRIES. IN-713C IS COMMONLY ASSOCIATED WITH AMS 5391, WHEREAS IN-713LC IS ASSOCIATED WITH AMS 5377. CAN AMS 5377 BE FORGED? AMS 5377 ITSELF IS AN INVESTMENT-CASTING SPECIFICATION. IT SHOULD NOT BE TREATED AS A WROUGHT-FORGING SPECIFICATION WITHOUT CONFIRMING A SEPARATE APPLICABLE STANDARD. IS INCONEL 713LC SUITABLE FOR TURBINE BLADES? YES. IN-713LC IS ASSOCIATED WITH HIGH-TEMPERATURE TURBINE AND HOT-SECTION APPLICATIONS, INCLUDING TURBINE BLADES AND VANES. WHAT IS AMS 5377H? AMS 5377H IS THE CURRENT REVISION LISTED BY SAE, REVISED JULY 18, 2025. FINAL TECHNICAL SUMMARY AMS 5377 / AMS 5377H REPRESENTS AN IMPORTANT SPECIFICATION FOR IN-713 LOW-CARBON NICKEL-BASE INVESTMENT CASTINGS. THE ALLOY IS COMMONLY SEARCHED AND TRADED UNDER: AMS 5377 | AMS5377 | AMS 5377H | IN-713LC | IN 713 LC | ALLOY 713LC | 713LC | INCONEL 713LC | UNS N07713 ITS COMBINATION OF NICKEL-BASE PRECIPITATION STRENGTHENING, CHROMIUM, MOLYBDENUM, ALUMINUM, TITANIUM AND NIOBIUM ADDITIONS MAKES IT SUITABLE FOR DEMANDING HIGH-TEMPERATURE APPLICATIONS. FOR MANUFACTURERS, THE MOST IMPORTANT TECHNICAL LESSON IS THAT AMS 5377 IS A CASTING SPECIFICATION, NOT A CONVENTIONAL WROUGHT ROUND-BAR STANDARD. THEREFORE, AN “AMS 5377 ROUND BAR” SHOULD BE SUPPLIED WITH AN UNAMBIGUOUS PRODUCT-FORM DESCRIPTION AND TRACEABILITY TO THE APPLICABLE AMS REVISION. FOR INTERNATIONAL PROCUREMENT, THE STRONGEST STRATEGY IS TO COMBINE THE TECHNICAL SPECIFICATION KEYWORD AMS 5377H WITH COMMERCIAL TERMS SUCH AS INCONEL 713LC, IN-713LC, ALLOY 713LC, UNS N07713, NICKEL ALLOY ROUND BAR, NICKEL SUPERALLOY, INVESTMENT CASTING, TURBINE ALLOY AND AEROSPACE NICKEL ALLOY.