AMS 6514 ROUND BAR MANUFACTURING: COMPLETE MARAGING 300 / C300 AEROSPACE STEEL GUIDE, EQUIVALENTS, STANDARDS, TRADE NAMES & GLOBAL KEYWORDS AMS 6514 ROUND BAR IS A PREMIUM AIRCRAFT-QUALITY 18% NICKEL MARAGING STEEL DESIGNED FOR COMPONENTS REQUIRING AN EXCEPTIONAL COMBINATION OF STRENGTH, TOUGHNESS, DIMENSIONAL STABILITY AND MACHINABILITY. THE SAE SPECIFICATION COVERS MARAGING STEEL BARS, FORGINGS, MECHANICAL TUBING, RINGS AND FORGING STOCK PRODUCED FROM CONSUMABLE-ELECTRODE VACUUM-MELTED MATERIAL IN THE ANNEALED CONDITION. THE CURRENT SAE LISTING IDENTIFIES AMS 6514K, REVISED FEBRUARY 23, 2022, AS THE LATEST REVISION SHOWN BY SAE. IN INTERNATIONAL ENGINEERING MARKETS, AMS 6514 IS COMMONLY ASSOCIATED WITH MARAGING 300, MARAGING C300, 18NI(300), UNS K93120 AND EUROPEAN MATERIAL 1.6354/X2NICOMO18-9-5, ALTHOUGH CROSS-REFERENCES MUST BE VERIFIED AGAINST THE APPLICABLE MATERIAL SPECIFICATION RATHER THAN TREATED AS AUTOMATICALLY INTERCHANGEABLE. AMS 6514 ROUND BAR AT A GLANCE SAE SPECIFICATION: AMS 6514 CURRENT REVISION IDENTIFIED BY SAE: AMS 6514K MATERIAL FAMILY: MARAGING STEEL GRADE: MARAGING 300 | C300 COMMON DESIGNATION: 18NI(300) UNS: K93120 EUROPEAN REFERENCE: DIN 1.6354 | EN X2NICOMO18-9-5 PRINCIPAL ALLOYING ELEMENTS: NI-CR? NO — PRIMARILY NI-CO-MO-TI-AL NICKEL: APPROXIMATELY 18.5% NOMINAL CHEMISTRY COBALT: APPROXIMATELY 9% MOLYBDENUM: APPROXIMATELY 4.9% TITANIUM: APPROXIMATELY 0.65% ALUMINUM: APPROXIMATELY 0.10% MANUFACTURING ROUTE: CONSUMABLE-ELECTRODE VACUUM MELTING TYPICAL PREMIUM ROUTE: VIM + VAR, WHEN REQUIRED BY PRODUCT/MILL SPECIFICATION DELIVERY CONDITION: ANNEALED / SOLUTION-ANNEALED FINAL STRENGTHENING: PRECIPITATION AGING PRODUCT: ROUND BAR, BAR STOCK, FORGING STOCK AND RELATED FORMS PRINCIPAL MARKETS: AEROSPACE, DEFENSE, TOOLING, MOTORSPORT, PRECISION ENGINEERING SAE'S SPECIFICATION TITLE ITSELF IDENTIFIES THE CHARACTERISTIC CHEMISTRY AS 18.5NI-9.0CO-4.9MO-0.65TI-0.10AL, AND THE CURRENT K REVISION COVERS PRODUCTS UP TO 10 IN. (254 MM) IN DIAMETER OR LEAST DISTANCE BETWEEN PARALLEL SIDES FOR THE SPECIFIED FORMS. WHAT IS AMS 6514 MARAGING 300 STEEL? AMS 6514 IS A SPECIFICATION FOR A HIGH-STRENGTH MARAGING STEEL RATHER THAN A CONVENTIONAL CARBON-HARDENING ALLOY. ITS STRENGTH IS DEVELOPED PRINCIPALLY THROUGH PRECIPITATION REACTIONS DURING AGING RATHER THAN THROUGH THE CONVENTIONAL QUENCH-AND-TEMPER TREATMENT USED FOR MANY ALLOY STEELS. THE VERY LOW CARBON CONTENT OF MARAGING STEELS PERMITS A TOUGH, RELATIVELY SOFT MARTENSITIC MATRIX AFTER SOLUTION TREATMENT. SUBSEQUENT AGING PRECIPITATES STRENGTHENING INTERMETALLIC PHASES, PRODUCING EXTREMELY HIGH STRENGTH WITH COMPARATIVELY LITTLE DIMENSIONAL CHANGE. THIS IS ONE REASON AMS 6514 MARAGING 300 ROUND BAR IS ATTRACTIVE FOR AEROSPACE SHAFTS, HIGHLY LOADED STRUCTURAL PARTS, PRECISION TOOLING AND OTHER COMPONENTS WHERE HIGH STRENGTH AND DIMENSIONAL CONTROL ARE IMPORTANT. VOESTALPINE'S BÖHLER V300, IDENTIFIED AS RELATED TO AMS 6514, DESCRIBES THE ALLOY AS A PREMIUM AIRCRAFT-QUALITY MARAGING STEEL AND LISTS A MINIMUM AGED YIELD-STRENGTH LEVEL OF 270 KSI / 1, 862 MPA FOR APPLICABLE PRODUCTS. AMS 6514 ROUND BAR CHEMICAL COMPOSITION A REPRESENTATIVE CHEMISTRY ASSOCIATED WITH AMS 6514 / MARAGING 300 IS: NICKEL (NI) 18.0–19.0% COBALT (CO) 8.5–9.5% MOLYBDENUM (MO) 4.6–5.2% TITANIUM (TI) 0.50–0.80% ALUMINUM (AL) 0.05–0.15% CARBON (C) VERY LOW MANGANESE (MN) LOW SILICON (SI) LOW IRON (FE) BALANCE A BÖHLER V300 DATA SET RELATED TO AMS 6514 LISTS NI AT 18–19%, CO AT 8.5–9.5%, MO AT 4.60–5.20%, TI AT 0.50–0.80% AND AL AT 0.05–0.15%, WITH CARBON, MANGANESE, SILICON, PHOSPHORUS AND SULFUR TIGHTLY CONTROLLED. IMPORTANT: EXACT CHEMISTRY, RESIDUAL-ELEMENT LIMITS AND CLEANLINESS REQUIREMENTS SHOULD BE TAKEN FROM THE APPLICABLE REVISION OF AMS 6514 AND THE PURCHASER'S ORDER. COMMERCIAL WEBSITES FREQUENTLY REPRODUCE APPROXIMATE CHEMISTRY AND SHOULD NOT REPLACE THE CONTROLLED SAE SPECIFICATION. HOW AMS 6514 ROUND BAR IS MANUFACTURED 1) RAW MATERIAL SELECTION MANUFACTURING BEGINS WITH CAREFULLY CONTROLLED ALLOY CHARGE MATERIALS. THE CHARGE IS SELECTED TO ACHIEVE THE REQUIRED NICKEL-COBALT-MOLYBDENUM MARAGING CHEMISTRY WHILE CONTROLLING: • CARBON • SULFUR • PHOSPHORUS • OXYGEN • NITROGEN • HYDROGEN • RESIDUAL ELEMENTS • NONMETALLIC INCLUSIONS FOR AEROSPACE-QUALITY MATERIAL, MELTING PRACTICE AND CLEANLINESS ARE CRITICAL BECAUSE THE FINAL COMPONENT MAY OPERATE UNDER VERY HIGH TENSILE AND FATIGUE STRESSES. 2) VACUUM MELTING AMS 6514 IS ASSOCIATED WITH CONSUMABLE-ELECTRODE VACUUM MELTING. THE SPECIFICATION HISTORY SHOWS THE MATERIAL TRANSITIONING TO TERMINOLOGY EXPLICITLY DESCRIBING VACUUM MELTING IN ITS LATER REVISIONS. HIGH-QUALITY PRODUCTION MAY EMPLOY A VIM + VAR ROUTE: VACUUM INDUCTION MELTING → ELECTRODE PREPARATION → VACUUM ARC REMELTING → HOMOGENIZATION → HOT WORKING THE PURPOSE IS TO OBTAIN: • CHEMICAL UNIFORMITY • REDUCED GAS CONTENT • IMPROVED CLEANLINESS • CONTROLLED SEGREGATION • BETTER FATIGUE PERFORMANCE • IMPROVED CONSISTENCY THROUGHOUT THE BAR BÖHLER'S V300 PRODUCT RELATED TO AMS 6514 SPECIFICALLY IDENTIFIES VIM + VAR AS ITS MELTING ROUTE. 3) ELECTRODE PREPARATION AND VAR FOLLOWING PRIMARY MELTING, THE CONSUMABLE ELECTRODE IS PREPARED FOR VACUUM ARC REMELTING. DURING VAR: 1. THE ELECTRODE IS PLACED INSIDE A VACUUM CHAMBER. 2. AN ELECTRIC ARC MELTS THE ELECTRODE PROGRESSIVELY. 3. MOLTEN METAL SOLIDIFIES INTO A CONTROLLED INGOT. 4. VACUUM CONDITIONS REDUCE UNWANTED GASES. 5. SOLIDIFICATION IS CONTROLLED TO IMPROVE METALLURGICAL UNIFORMITY. THIS STAGE IS PARTICULARLY VALUABLE FOR PREMIUM AEROSPACE BAR BECAUSE INCLUSIONS AND SEGREGATION CAN HAVE A DISPROPORTIONATE EFFECT ON FATIGUE AND FRACTURE PERFORMANCE. 4) HOMOGENIZATION THE VACUUM-MELTED INGOT UNDERGOES HIGH-TEMPERATURE HOMOGENIZATION BEFORE HOT WORKING. THE OBJECTIVE IS TO REDUCE CHEMICAL SEGREGATION PRODUCED DURING SOLIDIFICATION AND ESTABLISH A SUITABLE METALLURGICAL CONDITION FOR FORGING OR ROLLING. TEMPERATURE, SOAK TIME AND COOLING CONDITIONS MUST BE CONTROLLED ACCORDING TO THE PRODUCER'S QUALIFIED PROCESSING ROUTE. 5) HOT FORGING OR HOT ROLLING THE INGOT IS CONVERTED INTO INTERMEDIATE BAR STOCK THROUGH CONTROLLED HOT WORKING. DEPENDING ON THE MILL'S MANUFACTURING ROUTE, THIS CAN INCLUDE: • OPEN-DIE FORGING • BREAKDOWN FORGING • COGGING • HOT ROLLING • ROTARY FORGING • BAR FORGING FOR ROUND BAR PRODUCTION, THE MATERIAL IS PROGRESSIVELY REDUCED UNTIL THE REQUIRED INTERMEDIATE DIAMETER IS ACHIEVED. THE DEFORMATION SCHEDULE MUST PROVIDE SUFFICIENT WORKING THROUGHOUT THE CROSS-SECTION AND AVOID DEFECTS SUCH AS: • CRACKS • LAPS • SEAMS • INTERNAL VOIDS • EXCESSIVE SEGREGATION • SURFACE TEARING 6) SOLUTION ANNEALING AMS 6514 MATERIAL IS SUPPLIED IN AN ANNEALED CONDITION, WITH SOLUTION/ANNEALING TREATMENT FORMING AN IMPORTANT PART OF THE MANUFACTURING PROCESS. SAE DESCRIBES THE MATERIAL AS CONSUMABLE-ELECTRODE VACUUM-MELTED AND ANNEALED. SOLUTION TREATMENT ESTABLISHES A SUITABLE LOW-HARDNESS MARTENSITIC CONDITION FOR SUBSEQUENT MANUFACTURING. THIS CONDITION IS PARTICULARLY USEFUL BECAUSE MARAGING 300 CAN BE MACHINED BEFORE FINAL AGING. THAT PERMITS MANUFACTURERS TO COMPLETE SUBSTANTIAL MACHINING WHILE THE MATERIAL REMAINS RELATIVELY MACHINABLE, THEN PERFORM AGING AFTER THE COMPONENT HAS REACHED ITS REQUIRED GEOMETRY. 7) DESCALING AND SURFACE CONDITIONING AFTER HEAT TREATMENT, THE BAR MAY UNDERGO: • SHOT BLASTING • PICKLING WHERE APPLICABLE • PEELING • TURNING • GRINDING • CENTERLESS GRINDING SURFACE CONDITIONING REMOVES OXIDE SCALE AND HELPS REVEAL SURFACE IMPERFECTIONS. FOR PRECISION AMS 6514 ROUND BAR, CENTERLESS GRINDING OR PRECISION TURNING MAY BE SPECIFIED AFTER PRELIMINARY CONDITIONING. 8) STRAIGHTENING ROUND BARS ARE CHECKED AND, WHEN NECESSARY, MECHANICALLY STRAIGHTENED. STRAIGHTNESS IS ESPECIALLY IMPORTANT FOR: • CNC MACHINING • GRINDING • SHAFTS • TOOLING • PRECISION COMPONENTS • AUTOMATED BAR FEEDING THE PERMISSIBLE STRAIGHTNESS SHOULD BE CONTROLLED AGAINST THE APPLICABLE SPECIFICATION, PURCHASE ORDER OR ENGINEERING DRAWING RATHER THAN USING A GENERIC COMMERCIAL TOLERANCE. 9) ULTRASONIC INSPECTION FOR CRITICAL AEROSPACE APPLICATIONS, NONDESTRUCTIVE TESTING CAN BE SPECIFIED TO DETECT INTERNAL DISCONTINUITIES. DEPENDING ON THE PURCHASE SPECIFICATION AND CUSTOMER REQUIREMENTS, INSPECTION MAY INCLUDE: • ULTRASONIC TESTING • MAGNETIC PARTICLE INSPECTION • EDDY-CURRENT INSPECTION • VISUAL EXAMINATION • DIMENSIONAL INSPECTION AEROSPACE MATERIAL SHOULD NOT BE DESCRIBED AS COMPLIANT WITH A PARTICULAR NDT STANDARD UNLESS THAT REQUIREMENT IS ACTUALLY INCLUDED IN THE PURCHASE ORDER OR MATERIAL CERTIFICATION. 10) PRECISION FINISHING AMS 6514 ROUND BAR MAY BE SUPPLIED WITH DIFFERENT SURFACE CONDITIONS, DEPENDING ON SIZE AND CUSTOMER REQUIREMENTS: BLACK BAR HOT-WORKED AND DESCALED MATERIAL. PEELED BAR A CONTROLLED MACHINING PROCESS REMOVES THE OUTER SURFACE. TURNED BAR THE SURFACE IS MACHINED TO A SPECIFIED DIAMETER AND FINISH. GROUND BAR CENTERLESS GRINDING PROVIDES TIGHTER DIMENSIONAL CONTROL AND IMPROVED SURFACE FINISH. PRECISION GROUND BAR USED WHERE PARTICULARLY CLOSE DIMENSIONAL REQUIREMENTS ARE REQUIRED BY THE COMPONENT DRAWING. 11) FINAL AGING — THE KEY STRENGTHENING OPERATION THE DEFINING FEATURE OF MARAGING 300 IS ITS PRECIPITATION-AGING RESPONSE. UNLIKE CONVENTIONAL 4340-TYPE STEEL, WHICH OBTAINS ITS STRENGTH PRIMARILY FROM QUENCH HARDENING FOLLOWED BY TEMPERING, MARAGING STEEL CAN BE MACHINED IN ITS RELATIVELY SOFT CONDITION AND THEN AGED TO ACHIEVE EXTREMELY HIGH STRENGTH. A COMMONLY REFERENCED MARAGING 300 AGING PRACTICE IS AROUND 900°F / 480°C, BUT THE ACTUAL TIME-TEMPERATURE CYCLE MUST BE CONTROLLED ACCORDING TO THE APPLICABLE MATERIAL SPECIFICATION, MILL PROCEDURE AND ENGINEERING REQUIREMENT. MMPDS DATA FOR AMS 6514 IDENTIFIES H900 AS A DESIGN CONDITION AND REPORTS APPROXIMATELY 280 KSI ULTIMATE TENSILE STRENGTH AND 270 KSI YIELD STRENGTH FOR BAR UNDER SPECIFIED SIZE CONDITIONS. AMS 6514 ROUND BAR MECHANICAL PROPERTIES THE EXACT REQUIREMENTS DEPEND ON DIAMETER, CONDITION, ORIENTATION AND APPLICABLE REVISION. REPRESENTATIVE AEROSPACE DESIGN DATA FOR AMS 6514 BAR IN AN AGED CONDITION INCLUDE: ULTIMATE TENSILE STRENGTH: UP TO ABOUT 280 KSI YIELD STRENGTH: UP TO ABOUT 270 KSI ELASTIC MODULUS: ABOUT 26.5–29.6 MSI DEPENDING ON DATA CONDITION DENSITY: ABOUT 0.286 LB/IN³ ELONGATION: SIZE/ORIENTATION DEPENDENT REDUCTION OF AREA: SIZE/ORIENTATION DEPENDENT MMPDS DATA LISTS 280 KSI LONGITUDINAL AND TRANSVERSE ULTIMATE STRENGTH AND 270 KSI YIELD STRENGTH FOR AMS 6514 BAR BELOW 4 IN., WITH SOMEWHAT REDUCED ULTIMATE STRENGTH FOR THE 4–10 IN. SIZE RANGE. DO NOT USE THESE FIGURES AS A SUBSTITUTE FOR THE AMS 6514 MATERIAL SPECIFICATION OR A CERTIFIED MILL TEST REPORT. AMS 6514 VS MARAGING 300 THE TERMS ARE CLOSELY ASSOCIATED BUT ARE NOT TECHNICALLY IDENTICAL CONCEPTS. MARAGING 300 DESCRIBES THE MATERIAL GRADE/FAMILY. AMS 6514 SPECIFIES THE AEROSPACE MATERIAL REQUIREMENTS FOR QUALIFYING FORMS AND CONDITIONS. THEREFORE, A GOOD TECHNICAL DESCRIPTION IS: AMS 6514 MARAGING 300 ROUND BAR RATHER THAN TREATING “AMS 6514” AND “MARAGING 300” AS COMPLETELY INDEPENDENT MATERIALS. INTERNATIONAL EQUIVALENTS AND CROSS-REFERENCES ONE OF THE MOST IMPORTANT AND ENGINEERING ASPECTS OF AMS 6514 IS THE LARGE NUMBER OF NAMES USED BY DIFFERENT MARKETS. SAE AEROSPACE AMS 6514 UNS K93120 COMMON GRADE: MARAGING 300 COMMERCIAL GRADE C300 NICKEL MARAGING DESIGNATION 18NI(300) EUROPEAN MATERIAL NUMBER 1.6354 EUROPEAN CHEMICAL DESIGNATION X2NICOMO18-9-5 MILITARY REFERENCE MIL-S-46850, GRADE 300 COMMERCIAL TRADE FAMILY VASCOMAX 300 / C300 TYPE VOESTALPINE COMMERCIAL GRADE BÖHLER V300 SPECIAL METALS COMMERCIAL REFERENCE UDIMAR 300 VOESTALPINE EXPLICITLY IDENTIFIES BÖHLER V300 AS RELATED TO AMS 6514 AND GIVES THE MARKET GRADE AS MARAGING 300 / 1.6354) SPECIAL METALS' UDIMAR 300 DATA IS ALSO INDEXED WITH UNS K93120 AND AMS 6514) IMPORTANT EQUIVALENCY WARNING SOME ONLINE SOURCES ASSOCIATE MARAGING 300 WITH 1.6358, WHILE OTHER TECHNICAL REFERENCES IDENTIFY 1.6354) THERE ARE ALSO CONFLICTING ASTM GRADE REFERENCES ONLINE. THEREFORE, DO NOT SUBSTITUTE 1.6354, 1.6358, ASTM GRADES, MIL SPECIFICATIONS OR COMMERCIAL TRADE NAMES FOR AMS 6514 WITHOUT CHECKING THE ACTUAL CHEMISTRY, HEAT TREATMENT, MELTING ROUTE AND MECHANICAL REQUIREMENTS. A MATERIAL THAT IS “SIMILAR TO MARAGING 300” IS NOT AUTOMATICALLY AMS 6514 CERTIFIED. COMMON TRADE NAMES FOR AMS 6514-TYPE MARAGING 300 COMMON COMMERCIAL TERMINOLOGY INCLUDES: • MARAGING 300 • MARAGING C300 • C300 STEEL • 18NI300 • 18NI MARAGING 300 • MARAGING 300 STEEL • 300 MARAGING STEEL • MARAGING 300 ROUND BAR • C300 ROUND BAR • 18NI(300) ROUND BAR • MARAGING STEEL BAR • ULTRA-HIGH-STRENGTH MARAGING STEEL • AEROSPACE MARAGING STEEL COMMERCIAL BRAND/PRODUCT NAMES ENCOUNTERED IN THE INTERNATIONAL MARKET INCLUDE: • VASCOMAX 300 • BÖHLER V300 • UDIMAR 300 • OTHER PRODUCER-SPECIFIC C300/V300-TYPE DESIGNATIONS THESE ARE TRADE OR MANUFACTURER DESIGNATIONS, NOT AUTOMATICALLY INTERCHANGEABLE CERTIFICATIONS. RELATED SPECIFICATIONS AND STANDARDS FOR PROCUREMENT, MANUFACTURING AND INSPECTION, THE FOLLOWING SPECIFICATIONS MAY APPEAR ALONGSIDE AMS 6514 DEPENDING ON THE APPLICATION: AEROSPACE MATERIAL SPECIFICATION AMS 6514 — PRIMARY SPECIFICATION FOR THE RELEVANT MARAGING STEEL FORMS. MILITARY SPECIFICATION MIL-S-46850 — COMMONLY ASSOCIATED WITH 18% NICKEL MARAGING STEELS AND GRADE 300 TERMINOLOGY. MMPDS MMPDS PROVIDES AEROSPACE DESIGN ALLOWABLES AND MATERIAL-PROPERTY DATA. ITS STEEL-PROPERTY TABLES INCLUDE AMS 6514 BAR. ASTM ASTM SPECIFICATIONS ARE SOMETIMES CITED COMMERCIALLY FOR RELATED MARAGING PRODUCTS, BUT THE EXACT GRADE/FORM RELATIONSHIP MUST BE VERIFIED BEFORE CLAIMING EQUIVALENCY. EN / DIN COMMON EUROPEAN REFERENCES INCLUDE: • EN 1.6354 • W.NR. 1.6354 • X2NICOMO18-9-5 AGAIN, THE DESIGNATION SHOULD BE VERIFIED AGAINST THE REQUIRED PRODUCT STANDARD. EN 10204 FOR EUROPEAN/INTERNATIONAL PURCHASING, EN 10204 3.1 MAY BE REQUESTED FOR MATERIAL CERTIFICATION. HOWEVER, THIS IS A CERTIFICATION/DOCUMENTATION STANDARD AND DOES NOT MAKE A MATERIAL AMS 6514 COMPLIANT BY ITSELF. AMS 6514 ROUND BAR MANUFACTURING QUALITY CONTROL A PREMIUM MANUFACTURER SHOULD CONTROL THE ENTIRE PRODUCTION CHAIN. CHEMICAL TESTING THE HEAT SHOULD BE CHECKED FOR: • NI • CO • MO • TI • AL • C • MN • SI • P • S • RESIDUAL ELEMENTS MECHANICAL TESTING DEPENDING ON REQUIREMENTS: • TENSILE TESTING • YIELD-STRENGTH TESTING • ELONGATION • REDUCTION OF AREA • HARDNESS • IMPACT TESTING WHERE SPECIFIED METALLURGICAL TESTING MAY INCLUDE: • MICROSTRUCTURE EXAMINATION • GRAIN-FLOW EVALUATION • INCLUSION RATING • SEGREGATION EXAMINATION • HEAT-TREATMENT VERIFICATION NONDESTRUCTIVE TESTING DEPENDING ON THE ORDER: • ULTRASONIC TESTING • MAGNETIC PARTICLE TESTING • EDDY-CURRENT TESTING • SURFACE INSPECTION DIMENSIONAL INSPECTION FINAL ROUND BAR INSPECTION CAN INCLUDE: • DIAMETER • OVALITY • STRAIGHTNESS • LENGTH • SURFACE CONDITION • SURFACE ROUGHNESS • END CONDITION AMS 6514 ROUND BAR APPLICATIONS THE EXCEPTIONAL STRENGTH-TO-WEIGHT AND DIMENSIONAL-STABILITY CHARACTERISTICS OF MARAGING 300 MAKE AMS 6514 PARTICULARLY RELEVANT TO HIGH-PERFORMANCE APPLICATIONS. AEROSPACE • LANDING-GEAR COMPONENTS • SHAFTS • STRUCTURAL COMPONENTS • HIGH-STRESS FITTINGS • ACTUATOR COMPONENTS • AIRCRAFT MECHANISMS • ROCKET COMPONENTS DEFENSE • HIGH-STRENGTH STRUCTURAL COMPONENTS • MISSILE-SYSTEM COMPONENTS • LAUNCH-SYSTEM HARDWARE • PRECISION MECHANICAL COMPONENTS TOOLING • DIES • MANDRELS • HIGH-STRENGTH TOOLING • PRECISION MOLDS • TOOL COMPONENTS MOTORSPORT • HIGH-PERFORMANCE SHAFTS • GEARS • DRIVE COMPONENTS • RACING HARDWARE PRECISION ENGINEERING • HIGHLY LOADED SHAFTS • GEARS • BEARINGS/COMPONENTS • PRECISION MECHANICAL PARTS BÖHLER IDENTIFIES V300/AMS 6514-TYPE MATERIAL FOR HIGHLY STRESSED AIRCRAFT AND ROCKET COMPONENTS, WHILE OTHER TECHNICAL REFERENCES LIST APPLICATIONS INCLUDING SHAFTS, GEARS, TOOLS AND HIGH-PERFORMANCE MOTORSPORT COMPONENTS. WHY CHOOSE AMS 6514 ROUND BAR? EXTREMELY HIGH STRENGTH AGED AMS 6514 CAN ACHIEVE APPROXIMATELY 270 KSI YIELD STRENGTH IN RELEVANT AEROSPACE DESIGN DATA. LOW-TEMPERATURE AGING THE MATERIAL DEVELOPS STRENGTH THROUGH PRECIPITATION AGING RATHER THAN CONVENTIONAL HIGH-TEMPERATURE QUENCH HARDENING. LOW DISTORTION THE AGING PROCESS CAN PROVIDE EXCELLENT DIMENSIONAL STABILITY COMPARED WITH CONVENTIONAL QUENCH-HARDENING ALLOYS. EXCELLENT MACHINABILITY BEFORE AGING THE RELATIVELY SOFT ANNEALED CONDITION ALLOWS MACHINING BEFORE THE FINAL HIGH-STRENGTH CONDITION. GOOD TOUGHNESS MARAGING STEELS PROVIDE AN ATTRACTIVE COMBINATION OF STRENGTH AND TOUGHNESS FOR DEMANDING APPLICATIONS. GOOD WELDABILITY THEIR LOW CARBON CONTENT MAKES THEM CONSIDERABLY DIFFERENT FROM MANY CONVENTIONAL ULTRA-HIGH-STRENGTH ALLOY STEELS IN FABRICATION BEHAVIOR. AMS 6514 VS 4340 STEEL AMS 6514 MARAGING 300 MATERIAL FAMILY: MARAGING STEEL CARBON: VERY LOW MAIN STRENGTHENING: PRECIPITATION AGING MAXIMUM STRENGTH POTENTIAL: EXTREMELY HIGH MACHINING BEFORE FINAL HARDENING: EXCELLENT HEAT-TREATMENT DISTORTION: GENERALLY LOW AEROSPACE USE: EXTENSIVE COST: HIGHER VACUUM MELTING: COMMON FOR PREMIUM AEROSPACE MATERIAL TYPICAL DESIGNATION: C300 / 18NI(300) 4340 MATERIAL FAMILY: NI-CR-MO ALLOY STEEL CARBON: RELATIVELY HIGH MAIN STRENGTHENING: QUENCH + TEMPER MAXIMUM STRENGTH POTENTIAL: VERY HIGH MACHINING BEFORE FINAL HARDENING: GOOD HEAT-TREATMENT DISTORTION: CAN BE SIGNIFICANT AEROSPACE USE: EXTENSIVE COST: GENERALLY LOWER VACUUM MELTING: DEPENDS ON SPECIFICATION TYPICAL DESIGNATION: 4340 AMS 6514 VS MARAGING 250 MARAGING 250 AND MARAGING 300 BELONG TO THE SAME BROAD 18% NICKEL MARAGING FAMILY BUT ARE DIFFERENT STRENGTH GRADES. MARAGING 300 IS SELECTED WHERE HIGHER STRENGTH IS REQUIRED, WHILE LOWER GRADES CAN OFFER A DIFFERENT BALANCE OF TOUGHNESS, DUCTILITY AND STRENGTH. DO NOT SUBSTITUTE AMS 6512/MARAGING 250 FOR AMS 6514 SIMPLY BECAUSE BOTH ARE MARAGING STEELS. AMS 6514 ROUND BAR SIZE AND MANUFACTURING OPTIONS DEPENDING ON THE PRODUCER, AMS 6514-TYPE ROUND BAR CAN BE MANUFACTURED OR FINISHED IN: • SMALL-DIAMETER PRECISION BAR • MEDIUM-DIAMETER ROUND BAR • LARGE-DIAMETER FORGED BAR • CUT-TO-LENGTH BAR • PEELED BAR • TURNED BAR • GROUND BAR • PRECISION-GROUND BAR • FORGED ROUND BAR THE AMS 6514K SAE DESCRIPTION SPECIFICALLY COVERS BARS AND RELATED PRODUCTS THROUGH 10.000 IN. (254.00 MM) DIAMETER OR LEAST DISTANCE BETWEEN PARALLEL SIDES FOR THE STATED PRODUCT SCOPE, WITH FORGING STOCK OF ANY SIZE COVERED FOR THE SPECIFIED PURPOSES. AMS 6514 ROUND BAR MANUFACTURING DEFECTS TO AVOID PROFESSIONAL PRODUCTION SHOULD CONTROL: SURFACE DEFECTS • SEAMS • LAPS • CRACKS • SCALE • ROLLED-IN DEFECTS INTERNAL DEFECTS • POROSITY • INCLUSIONS • SHRINKAGE • CENTERLINE SEGREGATION • INTERNAL CRACKING HEAT-TREATMENT PROBLEMS • INCORRECT SOLUTION TREATMENT • INCORRECT AGING TEMPERATURE • INSUFFICIENT AGING • OVER-AGING • EXCESSIVE DIMENSIONAL CHANGE MACHINING PROBLEMS • GRINDING BURNS • EXCESSIVE STOCK REMOVAL • SURFACE TEARING • INCORRECT DIAMETER • OVALITY • POOR STRAIGHTNESS AMS 6514 ROUND BAR KEYWORD CLUSTER FOR INTERNATIONAL B2B SEARCH VISIBILITY, THE MOST USEFUL HIGH-INTENT KEYWORD THEMES SURROUNDING THIS MATERIAL INCLUDE: PRIMARY KEYWORDS • AMS 6514 ROUND BAR • AMS 6514 STEEL ROUND BAR • AMS 6514 MARAGING 300 • AMS 6514 MARAGING 300 ROUND BAR • AMS 6514 MATERIAL • AMS 6514 STEEL • AMS 6514 SPECIFICATION • AMS 6514 EQUIVALENT • AMS 6514 SUPPLIER • AMS 6514 MANUFACTURER • AMS 6514 STOCKIST • AMS 6514 EXPORTER INTERNATIONAL GRADE KEYWORDS • MARAGING 300 ROUND BAR • MARAGING 300 STEEL • MARAGING 300 BAR • C300 STEEL ROUND BAR • C300 MARAGING STEEL • 18NI300 ROUND BAR • 18NI MARAGING STEEL • 18NI(300) STEEL • UNS K93120 ROUND BAR • 1.6354 ROUND BAR • X2NICOMO18-9-5 STEEL • MARAGING 300 EQUIVALENT COMMERCIAL SEARCH TERMS • AMS 6514 ROUND BAR MANUFACTURER • AMS 6514 ROUND BAR SUPPLIER • AMS 6514 ROUND BAR EXPORTER • AMS 6514 ROUND BAR STOCKIST • AMS 6514 BAR PRICE • AMS 6514 STEEL PRICE • MARAGING 300 ROUND BAR PRICE • MARAGING 300 SUPPLIER • MARAGING 300 MANUFACTURER • MARAGING 300 STOCKIST • C300 STEEL SUPPLIER • AEROSPACE MARAGING STEEL SUPPLIER MANUFACTURING KEYWORDS • AMS 6514 ROUND BAR MANUFACTURING • AMS 6514 HEAT TREATMENT • AMS 6514 AGING TREATMENT • MARAGING 300 HEAT TREATMENT • MARAGING 300 AGING • MARAGING 300 SOLUTION ANNEALED • MARAGING STEEL MANUFACTURING • VIM VAR MARAGING 300 • VACUUM MELTED MARAGING STEEL • AEROSPACE QUALITY MARAGING STEEL • PRECISION GROUND MARAGING 300 BAR NOTE: I CAN VERIFY THE INTERNATIONAL SEARCH-INTENT VOCABULARY, BUT I DO NOT HAVE ACCESS HERE TO GOOGLE'S PROPRIETARY WORLDWIDE MONTHLY-SEARCH-VOLUME DATABASE. THEREFORE, I HAVE DELIBERATELY NOT INVENTED NUMERICAL SEARCH VOLUMES OR RANKINGS. THE KEYWORD ARCHITECTURE ABOVE IS BASED ON COMMERCIALLY IMPORTANT MATERIAL NAMES, SPECIFICATION SEARCHES, EQUIVALENTS AND B2B PROCUREMENT INTENT RATHER THAN FABRICATED VOLUME FIGURES. RECOMMENDED TITLE AMS 6514 ROUND BAR MANUFACTURING GUIDE: MARAGING 300 STEEL, UNS K93120, C300, 1.6354 EQUIVALENTS, STANDARDS, HEAT TREATMENT & GLOBAL APPLICATIONS ALTERNATIVE HIGH-INTENT TITLE AMS 6514 MARAGING 300 ROUND BAR | MANUFACTURING PROCESS, UNS K93120, C300, 18NI300, 1.6354, MIL-S-46850 & AEROSPACE SPECIFICATIONS SUGGESTED META DESCRIPTION DISCOVER AMS 6514 ROUND BAR MANUFACTURING, MARAGING 300/C300 STEEL PROPERTIES, UNS K93120, 1.6354 EQUIVALENTS, VIM+VAR MELTING, HEAT TREATMENT, AGING, ASTM/MIL/EN REFERENCES, APPLICATIONS AND GLOBAL SUPPLIER TERMINOLOGY. SUGGESTED URL SLUG AMS-6514-MARAGING-300-ROUND-BAR-MANUFACTURING FREQUENTLY ASKED QUESTIONS WHAT IS AMS 6514? AMS 6514 IS AN SAE AEROSPACE MATERIAL SPECIFICATION COVERING PREMIUM AIRCRAFT-QUALITY MARAGING STEEL IN BARS, FORGINGS, MECHANICAL TUBING, RINGS AND SPECIFIED FORGING STOCK. THE CURRENT SAE LISTING IDENTIFIES REVISION AMS 6514K, REVISED FEBRUARY 23, 2022) WHAT GRADE IS AMS 6514? AMS 6514 IS COMMONLY ASSOCIATED WITH MARAGING 300 / C300 / 18NI(300). WHAT IS THE UNS NUMBER FOR AMS 6514? THE COMMONLY REFERENCED UNS DESIGNATION IS UNS K93120. THIS IS SUPPORTED BY TECHNICAL PRODUCT REFERENCES FROM VOESTALPINE AND SPECIAL METALS-RELATED DATA. WHAT IS THE EUROPEAN EQUIVALENT OF AMS 6514? 1.6354 / X2NICOMO18-9-5 IS A COMMONLY CITED EUROPEAN REFERENCE FOR MARAGING 300. IS AMS 6514 THE SAME AS VASCOMAX 300? VASCOMAX 300 IS A COMMERCIAL TRADE DESIGNATION ASSOCIATED WITH THE MARAGING 300 FAMILY. IT SHOULD NOT AUTOMATICALLY BE TREATED AS AN AMS 6514 CERTIFICATION UNLESS THE SUPPLIED MATERIAL IS SPECIFICALLY CERTIFIED TO AMS 6514. IS AMS 6514 THE SAME AS MARAGING 300? AMS 6514 IS THE AEROSPACE SPECIFICATION; MARAGING 300 IS THE COMMONLY USED GRADE/MATERIAL DESIGNATION. THEY ARE CLOSELY ASSOCIATED, BUT THE SPECIFICATION CONTROLS THE ACTUAL REQUIREMENTS. IS AMS 6514 SUITABLE FOR AEROSPACE? YES. SAE IDENTIFIES AMS 6514 AS A PREMIUM AIRCRAFT-QUALITY MATERIAL SPECIFICATION, AND AEROSPACE DESIGN DATA SUCH AS MMPDS INCLUDES AMS 6514 BAR. CAN AMS 6514 BE MACHINED BEFORE AGING? YES. ONE OF THE PRINCIPAL MANUFACTURING ADVANTAGES OF MARAGING 300 IS THAT IT CAN BE MACHINED IN ITS RELATIVELY SOFT SOLUTION-TREATED/ANNEALED CONDITION BEFORE FINAL PRECIPITATION AGING. DOES AMS 6514 REQUIRE VIM + VAR? THE SPECIFICATION IS DESCRIBED BY SAE AS CONSUMABLE-ELECTRODE VACUUM MELTED. SPECIFIC COMMERCIAL AEROSPACE PRODUCTS MAY USE VIM + VAR, BUT THE EXACT MELTING AND REMELTING REQUIREMENTS SHOULD ALWAYS BE CONFIRMED AGAINST THE APPLICABLE AMS REVISION AND PURCHASE ORDER. FINAL TECHNICAL SUMMARY AMS 6514 ROUND BAR IS A PREMIUM AEROSPACE MARAGING 300 STEEL ENGINEERED AROUND THE COMBINATION OF VERY HIGH STRENGTH, GOOD TOUGHNESS, LOW CARBON, EXCELLENT PRE-AGING MACHINABILITY AND COMPARATIVELY LOW HEAT-TREATMENT DISTORTION. ITS MANUFACTURING CHAIN CENTERS ON CONTROLLED VACUUM MELTING, HOT WORKING, ANNEALING/SOLUTION TREATMENT, SURFACE CONDITIONING, DIMENSIONAL FINISHING, INSPECTION AND CONTROLLED PRECIPITATION AGING. FOR INTERNATIONAL PROCUREMENT, THE MOST IMPORTANT SEARCH AND IDENTIFICATION TERMS ARE: AMS 6514 → MARAGING 300 → C300 → 18NI(300) → UNS K93120 → 1.6354 → X2NICOMO18-9-5 → MIL-S-46850 GRADE 300 → VASCOMAX 300 / BÖHLER V300 / UDIMAR 300-TYPE COMMERCIAL REFERENCES. HOWEVER, THESE SHOULD BE TREATED AS CROSS-REFERENCE TERMS RATHER THAN BLANKET GUARANTEES OF EQUIVALENCY. FOR AEROSPACE PURCHASING, THE FINAL AUTHORITY SHOULD ALWAYS BE THE APPLICABLE AMS REVISION, CERTIFIED MILL TEST REPORT, HEAT-TREATMENT CONDITION AND CUSTOMER ENGINEERING SPECIFICATION.