AIRESIST 215 ROUND BAR MANUFACTURING: GLOBAL GUIDE TO AR-215 COBALT-BASED SUPERALLOY, EQUIVALENTS, SPECIFICATIONS, APPLICATIONS & HIGH-TEMPERATURE ENGINEERING IMPORTANT TECHNICAL NOTE: AIRESIST 215 IS A COBALT-BASE CAST SUPERALLOY, NOT A CONVENTIONAL WROUGHT NICKEL-ALLOY BAR GRADE. PUBLISHED MATERIALS REFERENCES IDENTIFY IT AS AIRESIST 215 / AR-215, WITH TYPICAL CHEMISTRY AROUND CO-19CR-7.5TA-4.5W-4.3AL, AND CLASSIFY IT AS A CAST ALLOY. THEREFORE, A PRODUCT MARKETED AS “AIRESIST 215 ROUND BAR” SHOULD BE SPECIFIED CAREFULLY—OFTEN AS CAST BAR, INVESTMENT-CAST STOCK, CENTRIFUGAL/OTHER CAST STOCK, OR MACHINED CAST BILLET, RATHER THAN ASSUMING A STANDARDIZED ASTM/EN WROUGHT-BAR DESIGNATION. AIRESIST 215 ROUND BAR — GLOBAL TITLE AIRESIST 215 ROUND BAR MANUFACTURER & SUPPLIER | AR-215 COBALT-BASED SUPERALLOY, CHEMICAL COMPOSITION, MANUFACTURING, EQUIVALENT GRADES, SPECIFICATIONS & APPLICATIONS HIGH-VOLUME KEYWORD CLUSTER FOR SEARCH, THE ARTICLE NATURALLY TARGETS COMMERCIAL AND TECHNICAL PHRASES SUCH AS: • AIRESIST 215 ROUND BAR • AIRESIST 215 BAR • AIRESIST 215 ALLOY • AIRESIST 215 MANUFACTURER • AIRESIST 215 SUPPLIER • AIRESIST 215 MATERIAL • AIRESIST 215 CHEMICAL COMPOSITION • AIRESIST 215 EQUIVALENT • AR-215 ALLOY • AR-215 ROUND BAR • COBALT ALLOY ROUND BAR • COBALT BASED SUPERALLOY • COBALT ALLOY MANUFACTURER • COBALT ALLOY SUPPLIER • HIGH TEMPERATURE ALLOY • HIGH TEMPERATURE ROUND BAR • AEROSPACE ALLOY • GAS TURBINE ALLOY • TURBINE BLADE MATERIAL • TURBINE VANE MATERIAL • HEAT RESISTANT ALLOY • OXIDATION RESISTANT ALLOY • CAST COBALT ALLOY • INVESTMENT CAST COBALT ALLOY • SUPERALLOY ROUND BAR • AEROSPACE ROUND BAR • HIGH TEMPERATURE METAL • SPECIALTY ALLOY SUPPLIER • NICKEL VS COBALT SUPERALLOY EXACT WORLDWIDE SEARCH VOLUMES ARE PROPRIETARY AND FLUCTUATE BY COUNTRY, SEARCH ENGINE, LANGUAGE AND MONTH. THE KEYWORD SET ABOVE IS THEREFORE AN -TARGETING CLUSTER RATHER THAN A CLAIM OF A PARTICULAR MONTHLY SEARCH VOLUME. 1) WHAT IS AIRESIST 215? AIRESIST 215, ALSO IDENTIFIED AS AR-215, IS A COBALT-BASE HEAT-RESISTANT SUPERALLOY DEVELOPED FOR DEMANDING ELEVATED-TEMPERATURE ENVIRONMENTS. ASM REFERENCES IDENTIFY AIRESIST 215 AS A COBALT ALLOY WITH TYPICAL COMPOSITION CONSISTING PRINCIPALLY OF COBALT, CHROMIUM, TANTALUM, TUNGSTEN AND ALUMINUM. THE ALLOY IS ASSOCIATED PARTICULARLY WITH GAS-TURBINE APPLICATIONS AND STATOR-VANE SERVICE. A REPRESENTATIVE COMPOSITION REPORTED IN TECHNICAL REFERENCES IS: ELEMENT - TYPICAL / NOMINAL LEVEL, WT.% COBALT (CO) BALANCE, APPROXIMATELY 63 CHROMIUM (CR) 19 NICKEL (NI) 0.5 TUNGSTEN (W) 4.5 ALUMINUM (AL) 4.3 IRON (FE) 0.5 CARBON (C) 0.35 TANTALUM (TA) 7.5 ZIRCONIUM (ZR) 0.1 YTTRIUM (Y) 0.1 THE EXACT CHEMISTRY SHOULD ALWAYS BE ESTABLISHED FROM THE APPLICABLE PURCHASE SPECIFICATION, HEAT CERTIFICATE AND MANUFACTURER-CONTROLLED MATERIAL STANDARD RATHER THAN FROM A GENERIC INTERNET COMPOSITION TABLE. 2) AIRESIST 215 INTERNATIONAL DESIGNATIONS & EQUIVALENTS ONE OF THE MOST IMPORTANT AND ENGINEERING QUESTIONS IS: WHAT IS THE EQUIVALENT OF AIRESIST 215? THERE IS NO SAFELY ESTABLISHED ONE-TO-ONE ASTM/UNS/EN/DIN/JIS EQUIVALENT THAT SHOULD AUTOMATICALLY BE SUBSTITUTED FOR AIRESIST 215. PUBLISHED AEROSPACE-ALLOY REFERENCES LIST AIRESIST 215 SEPARATELY FROM OTHER COBALT-BASE ALLOYS, RATHER THAN ASSIGNING IT A CONVENTIONAL UNIVERSALLY INTERCHANGEABLE UNS NUMBER. A TECHNICAL COMPARISON ALSO IDENTIFIES AIRESIST 215 INDEPENDENTLY FROM ALLOYS SUCH AS HAYNES 25, HAYNES 188, MAR-M 302, MAR-M 322 AND MAR-M 509) INTERNATIONAL NAMES ENCOUNTERED IN TECHNICAL LITERATURE REGION / SYSTEM - DESIGNATION INTERNATIONAL TECHNICAL LITERATURE: AIRESIST 215 ALTERNATE DESIGNATION: AR-215 MATERIAL FAMILY: COBALT-BASE SUPERALLOY METALLURGICAL CATEGORY: CAST COBALT ALLOY APPLICATION CATEGORY: GAS-TURBINE/HIGH-TEMPERATURE ALLOY CHEMISTRY SHORTHAND: CO-19CR-7.5TA-4.5W-4.3AL THE AR-215 DESIGNATION IS DOCUMENTED IN TECHNICAL MATERIAL REFERENCES. IMPORTANT WARNING ABOUT “EQUIVALENT GRADES” AIRESIST 215 SHOULD NOT SIMPLY BE REPLACED BY: • HAYNES 25 / L-605 • HAYNES 188 • MAR-M 302 • MAR-M 509 • FSX-414 • STELLITE GRADES • X-40 • WI-52 THESE ALLOYS MAY BE SIMILAR TRADE-FAMILY MATERIALS OR APPLICATION COMPETITORS, BUT THEY ARE NOT AUTOMATICALLY CHEMICAL OR PERFORMANCE EQUIVALENTS. FOR AEROSPACE OR GAS-TURBINE COMPONENTS, SUBSTITUTION SHOULD BE APPROVED THROUGH ENGINEERING QUALIFICATION RATHER THAN BY A GENERIC “EQUIVALENT GRADE” CHART. 3) SIMILAR TRADE NAMES AND RELATED COBALT SUPERALLOYS AIRESIST 215 BELONGS TO THE BROADER FAMILY OF COBALT-BASED HEAT-RESISTANT ALLOYS. FREQUENTLY ENCOUNTERED COMPARISON MATERIALS INCLUDE: AIRESIST FAMILY • AIRESIST 13 / AR-13 • AIRESIST 213 / AR-213 • AIRESIST 215 / AR-215 PUBLISHED COMPOSITION TABLES DISTINGUISH THESE ALLOYS BY THEIR CHROMIUM, TUNGSTEN, TANTALUM AND ALUMINUM CONTENTS. OTHER RELATED COBALT-BASE ALLOYS • HAYNES 25 • L-605 • HAYNES 188 • FSX-414 • FSX-418 • FSX-430 • MAR-M 302 • MAR-M 322 • MAR-M 509 • MAR-M 918 • WI-52 • X-40 • X-45 • S-816 THESE MATERIALS APPEAR ALONGSIDE AIRESIST ALLOYS IN TECHNICAL COBALT-SUPERALLOY CLASSIFICATIONS. 4) IS AIRESIST 215 A NICKEL ALLOY? NO. AIRESIST 215 IS PRINCIPALLY A COBALT-BASE ALLOY, NOT A NICKEL-BASE SUPERALLOY. THIS DISTINCTION IS PARTICULARLY IMPORTANT FOR PROCUREMENT AND BECAUSE SEARCHES FOR: “AIRESIST 215 NICKEL ALLOY” MAY PRODUCE MISLEADING RESULTS. THE PRINCIPAL ALLOY MATRIX IS COBALT, WITH CHROMIUM, TANTALUM, TUNGSTEN AND ALUMINUM PROVIDING IMPORTANT HIGH-TEMPERATURE CHARACTERISTICS. TECHNICAL SOURCES CLASSIFY AIRESIST 215 AMONG COBALT-BASED SUPERALLOYS. 5) AIRESIST 215 ROUND BAR MANUFACTURING STEP 1 — RAW MATERIAL SELECTION MANUFACTURING STARTS WITH CONTROLLED RAW MATERIALS: • COBALT • CHROMIUM • TUNGSTEN • TANTALUM • ALUMINUM • NICKEL • IRON • CARBON • ZIRCONIUM • YTTRIUM THE CHARGE MATERIALS SHOULD BE SELECTED ACCORDING TO THE SPECIFIED CHEMISTRY AND CLEANLINESS REQUIREMENTS. BECAUSE TANTALUM AND TUNGSTEN ARE SIGNIFICANT ALLOYING ADDITIONS, CHARGE CALCULATION AND MELTING CONTROL ARE PARTICULARLY IMPORTANT. STEP 2 — VACUUM MELTING AIRESIST 215 CAN BE PRODUCED USING CONTROLLED MELTING TECHNOLOGY APPROPRIATE TO HIGH-PERFORMANCE COBALT ALLOYS. VACUUM-MELTING SUPPLIERS LIST AIRESIST 215 AMONG COBALT-BASE VACUUM-MELT ALLOYS AND EMPHASIZE CONTROLLED FURNACE PROCESSING FOR AEROSPACE AND INDUSTRIAL GAS-TURBINE APPLICATIONS. A CONTROLLED MELTING ROUTE CAN HELP MINIMIZE: • GAS PICKUP • OXIDATION • UNWANTED INCLUSIONS • CHEMISTRY VARIATION • CONTAMINATION FOR CRITICAL AEROSPACE APPLICATIONS, MELTING PRACTICE SHOULD BE TRACEABLE TO THE CUSTOMER'S APPROVED MATERIAL SPECIFICATION. 6) INVESTMENT CASTING AND CAST-BAR PRODUCTION A KEY POINT IN MANUFACTURING AIRESIST 215 IS THAT PUBLISHED REFERENCES CLASSIFY IT AS A CAST ALLOY. THIS MAKES THE CONVENTIONAL SEQUENCE: MELTING → CASTING → SOLIDIFICATION → HEAT TREATMENT → INSPECTION → MACHINING MORE REPRESENTATIVE THAN A STANDARD: BILLET → HOT ROLLING → BAR FINISHING WROUGHT-STAINLESS-STEEL PRODUCTION ROUTE. TECHNICAL LITERATURE SPECIFICALLY LISTS AIRESIST 215 AS CAST, ALONGSIDE OTHER CAST COBALT SUPERALLOYS. FOR A CUSTOMER REQUIRING A “ROUND BAR, ” THE SUPPLIER SHOULD THEREFORE CLARIFY WHETHER THE REQUESTED PRODUCT IS: • CAST ROUND BAR • CAST BILLET • INVESTMENT-CAST BAR • CENTRIFUGALLY CAST STOCK • MACHINED CAST STOCK • FORGED/WROUGHT MATERIAL, IF SPECIFICALLY QUALIFIED • CUSTOM TEST BAR 7) CASTING PROCESS CONTROL IMPORTANT MANUFACTURING CONTROLS INCLUDE: MOLD PREPARATION DEPENDING ON THE CUSTOMER'S REQUIREMENTS, AN APPROPRIATE HIGH-TEMPERATURE MOLD SYSTEM IS PREPARED. POURING THE MOLTEN ALLOY IS INTRODUCED UNDER CONTROLLED CONDITIONS. SOLIDIFICATION SOLIDIFICATION MUST BE CONTROLLED TO REDUCE UNDESIRABLE: • POROSITY • SEGREGATION • SHRINKAGE • OXIDE INCLUSIONS • HOT CRACKING FETTLING AND CLEANING AFTER CASTING, EXCESS MATERIAL AND CASTING FEATURES ARE REMOVED. HEAT TREATMENT A CONTROLLED THERMAL CYCLE MAY BE SPECIFIED TO OPTIMIZE THE REQUIRED MICROSTRUCTURE AND MECHANICAL PROPERTIES. THE EXACT HEAT-TREATMENT SCHEDULE SHOULD NOT BE COPIED FROM ANOTHER COBALT ALLOY. IT SHOULD BE ESTABLISHED FROM THE APPLICABLE AIRESIST 215 TECHNICAL SPECIFICATION OR CUSTOMER-APPROVED PROCEDURE. 8) AIRESIST 215 MICROSTRUCTURE AIRESIST 215 IS A COMPLEX CAST COBALT SUPERALLOY WHOSE PROPERTIES DEPEND STRONGLY ON ITS ALLOYING ELEMENTS AND RESULTING MICROSTRUCTURE. ALUMINUM IS PARTICULARLY SIGNIFICANT. A PUBLISHED STUDY DESCRIBES AIRESIST 215 AS A CAST CO-BASED SUPERALLOY WITH UNUSUALLY HIGH ALUMINUM CONTENT AMONG COMMERCIAL SUPERALLOYS AND EXAMINES ITS MICROSTRUCTURE AND MECHANICAL BEHAVIOR AFTER HEAT TREATMENT. THE ALLOYING SYSTEM PROMOTES A COMBINATION OF: • SOLID-SOLUTION STRENGTHENING • PRECIPITATION/CARBIDE STRENGTHENING • HIGH-TEMPERATURE STRUCTURAL STABILITY • OXIDATION RESISTANCE • HOT CORROSION RESISTANCE 9) WHY CHROMIUM IS ADDED CHROMIUM IS A MAJOR COMPONENT OF AIRESIST 215. ITS FUNCTIONS INCLUDE CONTRIBUTING TO: • OXIDATION RESISTANCE • CORROSION RESISTANCE • HIGH-TEMPERATURE ENVIRONMENTAL RESISTANCE • PROTECTIVE OXIDE FORMATION THE NOMINAL CHROMIUM LEVEL REPORTED FOR AIRESIST 215 IS APPROXIMATELY 19 WT.%. 10) ROLE OF TUNGSTEN AIRESIST 215 CONTAINS APPROXIMATELY 4.5 WT.% TUNGSTEN IN PUBLISHED NOMINAL COMPOSITIONS. TUNGSTEN CONTRIBUTES TO HIGH-TEMPERATURE STRENGTH THROUGH SOLID-SOLUTION STRENGTHENING AND PARTICIPATES IN THE ALLOY'S COMPLEX HIGH-TEMPERATURE MICROSTRUCTURE. 11) ROLE OF TANTALUM TANTALUM IS ONE OF THE DEFINING ALLOYING ADDITIONS IN AIRESIST 215. A NOMINAL VALUE OF APPROXIMATELY 7.5 WT.% TA IS REPORTED IN TECHNICAL COMPOSITION TABLES. TANTALUM IS IMPORTANT FOR HIGH-TEMPERATURE STRENGTHENING AND PHASE STABILITY. THIS IS ONE REASON AIRESIST 215 SHOULD NOT BE CASUALLY TREATED AS INTERCHANGEABLE WITH A LOWER-TANTALUM COBALT ALLOY. 12) ROLE OF ALUMINUM AIRESIST 215 CONTAINS APPROXIMATELY 4.3 WT.% ALUMINUM IN PUBLISHED COMPOSITIONS. RESEARCH SPECIFICALLY HIGHLIGHTS ITS RELATIVELY HIGH ALUMINUM CONTENT AND INVESTIGATES HOW HEAT TREATMENT AFFECTS ITS MICROSTRUCTURE AND MECHANICAL PROPERTIES. ALUMINUM CONTRIBUTES STRONGLY TO HIGH-TEMPERATURE OXIDATION BEHAVIOR AND PRECIPITATION-RELATED STRENGTHENING MECHANISMS. 13) AIRESIST 215 MECHANICAL PROPERTIES MECHANICAL PROPERTIES DEPEND ON: • CASTING PROCESS • SECTION SIZE • HEAT TREATMENT • GRAIN STRUCTURE • TEST TEMPERATURE • SPECIMEN ORIENTATION • CASTING QUALITY • APPLICABLE MATERIAL SPECIFICATION CONSEQUENTLY, A GENERIC ROOM-TEMPERATURE TENSILE VALUE SHOULD NOT BE REPRESENTED AS A UNIVERSAL AIRESIST 215 SPECIFICATION. ASM DATA PLACE AIRESIST 215 AMONG COBALT ALLOYS EVALUATED FOR HIGH-TEMPERATURE MECHANICAL PERFORMANCE, WHILE AEROSPACE REFERENCES EMPHASIZE THE IMPORTANCE OF COBALT-BASE ALLOYS FOR HOT-SECTION APPLICATIONS. FOR PROCUREMENT, REQUEST A CERTIFICATE CONTAINING THE ACTUAL HEAT'S CHEMISTRY AND MECHANICAL TEST RESULTS. 14) HIGH-TEMPERATURE PERFORMANCE THE MAJOR REASON ENGINEERS SELECT AIRESIST 215 IS ITS COMBINATION OF HIGH-TEMPERATURE PROPERTIES. POTENTIAL PERFORMANCE CHARACTERISTICS INCLUDE: • HIGH-TEMPERATURE STRENGTH • CREEP RESISTANCE • STRESS-RUPTURE RESISTANCE • OXIDATION RESISTANCE • HOT-CORROSION RESISTANCE • THERMAL STABILITY COBALT-BASED SUPERALLOYS ARE PARTICULARLY IMPORTANT FOR STATIONARY GAS-TURBINE COMPONENTS BECAUSE OF THEIR HIGH-TEMPERATURE AND ENVIRONMENTAL RESISTANCE. 15) AIRESIST 215 APPLICATIONS AIRESIST 215 HAS BEEN ASSOCIATED PARTICULARLY WITH GAS-TURBINE ENGINE STATOR-VANE APPLICATIONS. POTENTIAL APPLICATION AREAS INCLUDE: AEROSPACE • GAS-TURBINE COMPONENTS • TURBINE STATOR COMPONENTS • HIGH-TEMPERATURE STATIONARY HARDWARE • HOT-SECTION COMPONENTS INDUSTRIAL GAS TURBINES • STATOR COMPONENTS • VANES • HIGH-TEMPERATURE STATIONARY PARTS • COMBUSTION-ADJACENT HARDWARE ENERGY EQUIPMENT WHERE QUALIFIED, COBALT-BASED SUPERALLOYS MAY BE CONSIDERED FOR COMPONENTS EXPOSED TO SEVERE TEMPERATURE AND OXIDATION ENVIRONMENTS. 16) AIRESIST 215 VS AIRESIST 213 BOTH BELONG TO THE AIRESIST COBALT-SUPERALLOY FAMILY. AIRESIST 213 BASE COBALT FORM IN PUBLISHED REFERENCES CAST CR ~20% W ~4.5% TA ~6.5% AL ~3.5% C ~0.20% TYPICAL ASSOCIATION GAS-TURBINE COMPONENTS AIRESIST 215 BASE COBALT FORM IN PUBLISHED REFERENCES CAST CR ~19% W ~4.5% TA ~7.5% AL ~4.3% C ~0.35% TYPICAL ASSOCIATION GAS-TURBINE STATOR VANES THE VALUES ABOVE ARE REPRESENTATIVE NOMINAL COMPOSITIONS FROM PUBLISHED TECHNICAL TABLES, NOT A SUBSTITUTE FOR A PURCHASE SPECIFICATION. 17) AIRESIST 215 VS HAYNES 25 HAYNES 25, ALSO KNOWN AS L-605, IS ANOTHER IMPORTANT COBALT-BASE HIGH-TEMPERATURE ALLOY. HOWEVER, IT HAS A SUBSTANTIALLY DIFFERENT CHEMISTRY AND PROCESSING/PRODUCT HISTORY FROM AIRESIST 215. THEREFORE: AIRESIST 215 ≠ HAYNES 25 THEY CAN BE CONSIDERED RELATED COBALT SUPERALLOYS, BUT NOT AUTOMATICALLY INTERCHANGEABLE EQUIVALENTS. 18) AIRESIST 215 VS MAR-M-509 MAR-M-509 IS ANOTHER CAST COBALT-BASE SUPERALLOY USED FOR HIGH-TEMPERATURE APPLICATIONS. BOTH MATERIALS CAN APPEAR IN AEROSPACE AND GAS-TURBINE MATERIAL COMPARISONS, BUT THEIR ALLOYING SYSTEMS ARE DIFFERENT. PUBLISHED TABLES SHOW MAR-M-509 WITH SUBSTANTIALLY DIFFERENT NICKEL, CHROMIUM, COBALT, TUNGSTEN AND TANTALUM LEVELS. THEREFORE: MAR-M-509 SHOULD BE DESCRIBED AS A COMPARABLE/RELATED COBALT SUPERALLOY, NOT AS AN AUTOMATIC AIRESIST 215 EQUIVALENT. 19) SPECIFICATION STANDARDS — WHAT SHOULD BE CLAIMED? THIS IS WHERE MANY ONLINE AIRESIST 215 ARTICLES BECOME TECHNICALLY INACCURATE. AIRESIST 215 DOES NOT APPEAR TO HAVE A BROADLY ESTABLISHED GENERIC EQUIVALENT SUCH AS: • UNS N06625 • UNS N07718 • ASTM A276 • ASTM B637 • EN 2.4663 • DIN 1.4980 THOSE DESIGNATIONS BELONG TO OTHER ALLOY SYSTEMS AND SHOULD NOT BE ATTACHED TO AIRESIST 215 MERELY TECHNICAL REFERENCES INSTEAD LIST AIRESIST 215 AS ITS OWN COBALT-BASE ALLOY DESIGNATION. RELEVANT STANDARDS FRAMEWORK DEPENDING ON THE CUSTOMER AND END APPLICATION, SPECIFICATIONS MAY INVOLVE: • ASTM INTERNATIONAL • AMS / SAE AEROSPACE MATERIAL SPECIFICATIONS • ASME • ISO • EN • DIN • BS • JIS • CUSTOMER-SPECIFIC AEROSPACE SPECIFICATIONS • OEM SPECIFICATIONS • FOUNDRY SPECIFICATIONS • INSPECTION/NDT SPECIFICATIONS BUT A STANDARD SHOULD BE QUOTED ONLY WHEN IT ACTUALLY COVERS THE PRODUCT AND GRADE BEING SUPPLIED. 20) ASTM STANDARDS AND AIRESIST 215 DO NOT AUTOMATICALLY ADVERTISE: “AIRESIST 215 ROUND BAR ASTM A276” UNLESS A PURCHASER'S SPECIFICATION EXPLICITLY ESTABLISHES THAT REQUIREMENT. ASTM A276 IS WIDELY ASSOCIATED WITH STAINLESS-STEEL AND HEAT-RESISTANT STEEL BAR PRODUCTS; IT IS NOT EVIDENCE OF A UNIVERSAL AIRESIST 215 SPECIFICATION. FOR A SPECIALIZED CAST COBALT ALLOY, THE CORRECT APPROACH IS GENERALLY TO IDENTIFY: 1. ALLOY DESIGNATION 2. CASTING METHOD 3. HEAT-TREATMENT CONDITION 4. APPLICABLE CUSTOMER/OEM SPECIFICATION 5. CHEMICAL REQUIREMENTS 6. MECHANICAL REQUIREMENTS 7. NDT REQUIREMENTS 8. DIMENSIONAL REQUIREMENTS 9. INSPECTION DOCUMENTATION 21) AMS / AEROSPACE SPECIFICATIONS AEROSPACE PURCHASING FREQUENTLY OPERATES THROUGH AMS AND OEM SPECIFICATIONS. PUBLISHED TECHNICAL TABLES SHOW AIRESIST 215 IN THE BROADER AEROSPACE/COBALT-ALLOY TECHNICAL LANDSCAPE, BUT THE ABSENCE OF AN IDENTIFIED UNIVERSAL AMS NUMBER SHOULD NOT BE FILLED WITH A FABRICATED SPECIFICATION. FOR AEROSPACE PROCUREMENT, SUPPLIERS SHOULD OBTAIN THE CUSTOMER'S EXACT: AMS / OEM / DRAWING / MATERIAL SPECIFICATION REVISION BEFORE MANUFACTURING. 22) QUALITY TESTING FOR AIRESIST 215 ROUND BAR A HIGH-QUALITY MANUFACTURING PROGRAM MAY INCLUDE: CHEMICAL ANALYSIS • OPTICAL EMISSION SPECTROSCOPY • XRF WHERE SUITABLE • LABORATORY VERIFICATION MECHANICAL TESTING • TENSILE TESTING • YIELD STRENGTH WHERE SPECIFIED • ELONGATION • STRESS RUPTURE • CREEP TESTING METALLURGICAL EXAMINATION • MICROSTRUCTURE • GRAIN STRUCTURE • CARBIDE/PHASE EVALUATION • METALLOGRAPHIC EXAMINATION NON-DESTRUCTIVE TESTING DEPENDING ON GEOMETRY AND CUSTOMER REQUIREMENTS: • ULTRASONIC TESTING • RADIOGRAPHIC TESTING • LIQUID PENETRANT TESTING • VISUAL INSPECTION DIMENSIONAL INSPECTION • DIAMETER • STRAIGHTNESS • ROUNDNESS • LENGTH • SURFACE CONDITION 23) AIRESIST 215 ROUND BAR SURFACE FINISH A SUPPLIER MAY OFFER DIFFERENT SURFACE CONDITIONS DEPENDING ON HOW THE MATERIAL IS PRODUCED. POSSIBLE CONDITIONS INCLUDE: • AS-CAST • ROUGH MACHINED • TURNED • GROUND • PRECISION MACHINED • CUSTOMER-SPECIFIC FINISHED DIMENSIONS FOR A CRITICAL APPLICATION, THE PURCHASE ORDER SHOULD CLEARLY DISTINGUISH: RAW CASTING DIMENSIONS FROM FINISHED MACHINED DIMENSIONS. 24) AIRESIST 215 MACHINING AIRESIST 215 IS A HIGH-PERFORMANCE COBALT ALLOY AND SHOULD BE MACHINED USING PROCEDURES APPROPRIATE FOR DIFFICULT-TO-MACHINE SUPERALLOYS. MACHINING REFERENCES SPECIFICALLY INCLUDE AIRESIST 215 AMONG COBALT-BASED SUPERALLOYS DISCUSSED IN SUPERALLOY MACHINING LITERATURE. MACHINING CONSIDERATIONS INCLUDE: • RIGID TOOLING • APPROPRIATE CARBIDE/ADVANCED TOOLING • CONTROLLED CUTTING SPEED • ADEQUATE COOLANT • AVOIDANCE OF EXCESSIVE WORK HARDENING • PROPER CHIP EVACUATION • STABLE FIXTURING EXACT CUTTING PARAMETERS SHOULD BE ESTABLISHED EXPERIMENTALLY FOR THE SPECIFIC CONDITION AND TOOLING SYSTEM. 25) AIRESIST 215 ROUND BAR SIZE AVAILABILITY BECAUSE AIRESIST 215 IS PRIMARILY DOCUMENTED AS A CAST ALLOY RATHER THAN A MAINSTREAM STANDARDIZED WROUGHT BAR, AVAILABLE SIZES CAN BE CUSTOM AND SUPPLIER-DEPENDENT. A MANUFACTURER MAY SUPPLY: • SMALL-DIAMETER CAST STOCK • LARGE-DIAMETER CAST STOCK • CUSTOM BILLETS • NEAR-NET-SHAPE CASTINGS • MACHINED ROUND STOCK • TEST BARS • SPECIAL-PURPOSE BLANKS THE PURCHASER SHOULD CONFIRM WHETHER THE REQUESTED DIAMETER IS PRODUCED BY CASTING, MACHINING FROM LARGER STOCK, OR ANOTHER QUALIFIED ROUTE. 26) AIRESIST 215 COMMON NAMES FOR INTERNATIONAL AND PROCUREMENT SEARCHES, THE FOLLOWING NAMING VARIATIONS MAY OCCUR: • AIRESIST 215 • AIRESIST-215 • AI RESIST 215 • AI RESIST 215 • AR-215 • AR 215 • AIRESIST 215 ALLOY • AIRESIST 215 COBALT ALLOY • AIRESIST 215 COBALT-BASE ALLOY • AIRESIST 215 SUPERALLOY • AIRESIST 215 CAST ALLOY • AIRESIST 215 ROUND BAR • AIRESIST 215 BAR • AIRESIST 215 ROD • AIRESIST 215 BILLET • AIRESIST 215 CASTING AR-215 IS PARTICULARLY IMPORTANT BECAUSE IT IS USED AS AN ALTERNATE DESIGNATION IN TECHNICAL REFERENCES. 27) BRAND NAMES AND COMMERCIAL TRADE NAMES AIRESIST IS A SPECIFIC ALLOY DESIGNATION RATHER THAN A GENERIC DESCRIPTION OF EVERY COBALT SUPERALLOY. OTHER COMMERCIAL/TRADE ALLOY NAMES APPEARING IN THE SAME TECHNICAL MARKETPLACE INCLUDE: • HAYNES • L-605 • MAR-M • STELLITE • FSX • WI-52 THESE NAMES REPRESENT DIFFERENT ALLOY PRODUCTS AND SHOULD NOT BE PRESENTED AS BRANDS OF AIRESIST 215 ITSELF. FOR EXAMPLE, HAYNES 25 AND MAR-M-509 ARE RELATED COBALT-BASE SUPERALLOYS, BUT THEY HAVE DIFFERENT COMPOSITIONS. 28) AIRESIST 215 VS STAINLESS STEEL AIRESIST 215 SHOULD NOT BE CATEGORIZED AS STAINLESS STEEL. IT IS A COBALT-BASED SUPERALLOY ENGINEERED FOR SUBSTANTIALLY MORE DEMANDING ELEVATED-TEMPERATURE APPLICATIONS. ITS PRINCIPAL SELLING POINT IS THEREFORE NOT SIMPLY CORROSION RESISTANCE AT AMBIENT CONDITIONS BUT THE COMBINED BEHAVIOR OF THE ALLOY UNDER SEVERE HIGH-TEMPERATURE SERVICE. 29) AIRESIST 215 VS NICKEL SUPERALLOYS NICKEL-BASED SUPERALLOYS DOMINATE MANY ROTATING TURBINE APPLICATIONS, WHILE COBALT-BASED SUPERALLOYS HAVE HISTORICALLY BEEN PARTICULARLY IMPORTANT FOR HOT STATIONARY COMPONENTS. TECHNICAL AEROSPACE REFERENCES IDENTIFY COBALT ALLOYS AS SUITABLE FOR COMPONENTS SUCH AS VANES AND OTHER STATIONARY GAS-TURBINE HARDWARE, OWING TO COMBINATIONS OF STRESS-RUPTURE, HOT-CORROSION AND HIGH-TEMPERATURE PROPERTIES. 30. GLOBAL PROCUREMENT KEYWORDS FOR INTERNATIONAL, MANUFACTURERS CAN TARGET COMBINATIONS SUCH AS: UNITED STATES AIRESIST 215 ROUND BAR SUPPLIER USA AR-215 COBALT ALLOY MANUFACTURER AIRESIST 215 AEROSPACE ALLOY SUPPLIER UNITED KINGDOM AIRESIST 215 ROUND BAR UK AR-215 COBALT ALLOY SUPPLIER UK GERMANY / EUROPE AIRESIST 215 RUNDSTAB AIRESIST 215 COBALT ALLOY EUROPE AR-215 WERKSTOFF INDIA AIRESIST 215 ROUND BAR MANUFACTURER INDIA AIRESIST 215 SUPPLIER INDIA AR-215 COBALT ALLOY MANUFACTURER CHINA AIRESIST 215 COBALT ALLOY AIRESIST 215 ROUND BAR SUPPLIER MIDDLE EAST AIRESIST 215 ROUND BAR UAE COBALT SUPERALLOY SUPPLIER DUBAI GLOBAL AIRESIST 215 MANUFACTURER AIRESIST 215 SUPPLIER AIRESIST 215 STOCKIST AIRESIST 215 EXPORTER AIRESIST 215 ALLOY PRICE AIRESIST 215 CHEMICAL COMPOSITION AIRESIST 215 EQUIVALENT 31) RECOMMENDED PRODUCT DESCRIPTION FOR MANUFACTURERS A TECHNICALLY SAFER PRODUCT DESCRIPTION IS: AIRESIST 215 (AR-215) COBALT-BASE CAST SUPERALLOY ROUND BAR / CAST BAR MANUFACTURED TO CUSTOMER-APPROVED CHEMICAL, DIMENSIONAL, HEAT-TREATMENT AND INSPECTION REQUIREMENTS. THIS IS PREFERABLE TO ASSIGNING AN UNSUPPORTED ASTM, UNS, DIN OR EN NUMBER. 32) AIRESIST 215 MANUFACTURING FLOW CHART RAW MATERIAL SELECTION ↓ CHARGE CALCULATION ↓ CONTROLLED VACUUM MELTING ↓ CHEMICAL ANALYSIS ↓ CASTING / INVESTMENT CASTING / QUALIFIED CAST-STOCK PRODUCTION ↓ SOLIDIFICATION CONTROL ↓ FETTLING & CLEANING ↓ HEAT TREATMENT ↓ ROUGH MACHINING ↓ NDT / METALLURGICAL INSPECTION ↓ FINAL MACHINING ↓ DIMENSIONAL INSPECTION ↓ MECHANICAL & CHEMICAL CERTIFICATION ↓ MARKING & TRACEABILITY ↓ PACKING & EXPORT 33) DOCUMENTATION SUPPLIED WITH AIRESIST 215 FOR SERIOUS INDUSTRIAL PROCUREMENT, DOCUMENTATION CAN INCLUDE: • MATERIAL TEST CERTIFICATE • HEAT NUMBER • CHEMICAL ANALYSIS • MECHANICAL TEST REPORT • HEAT-TREATMENT RECORD • DIMENSIONAL INSPECTION REPORT • NDT REPORT • METALLURGICAL REPORT • CERTIFICATE OF CONFORMITY • CERTIFICATE OF ORIGIN • TRACEABILITY DOCUMENTATION • CUSTOMER-SPECIFIC INSPECTION DOCUMENTATION FOR AEROSPACE APPLICATIONS, ADDITIONAL DOCUMENTATION MAY BE REQUIRED BY THE PURCHASER OR OEM. 34) FREQUENTLY ASKED QUESTIONS WHAT IS AIRESIST 215? AIRESIST 215 IS A COBALT-BASE CAST SUPERALLOY, ALSO IDENTIFIED AS AR-215, USED FOR DEMANDING HIGH-TEMPERATURE APPLICATIONS. WHAT IS THE COMPOSITION OF AIRESIST 215? A COMMONLY REPORTED NOMINAL COMPOSITION IS APPROXIMATELY 63% CO, 19% CR, 7.5% TA, 4.5% W AND 4.3% AL, WITH SMALLER ADDITIONS OF NI, FE, C, ZR AND Y. IS AIRESIST 215 A NICKEL ALLOY? NO. IT IS A COBALT-BASE SUPERALLOY. WHAT IS THE EQUIVALENT OF AIRESIST 215? THERE IS NO UNIVERSALLY VALID ONE-TO-ONE ASTM/UNS/EN EQUIVALENT. RELATED COBALT ALLOYS INCLUDE HAYNES 25, HAYNES 188, MAR-M-509 AND FSX ALLOYS, BUT THESE ARE COMPARATIVE MATERIALS RATHER THAN AUTOMATIC EQUIVALENTS. IS AIRESIST 215 A WROUGHT ROUND-BAR ALLOY? PUBLISHED TECHNICAL REFERENCES CLASSIFY AIRESIST 215 AS A CAST ALLOY. CONSEQUENTLY, “ROUND BAR” SHOULD BE CLEARLY DEFINED AS CAST STOCK, MACHINED CAST STOCK OR ANOTHER SPECIFICALLY QUALIFIED PRODUCT FORM. WHERE IS AIRESIST 215 USED? IT IS PARTICULARLY ASSOCIATED WITH GAS-TURBINE COMPONENTS AND STATOR VANES. IS AIRESIST 215 THE SAME AS MAR-M-509? NO. THEY ARE BOTH COBALT-BASE CAST SUPERALLOYS, BUT THEY HAVE DIFFERENT COMPOSITIONS AND SHOULD NOT BE TREATED AS INTERCHANGEABLE. 35) FINAL TECHNICAL SUMMARY AIRESIST 215 / AR-215 IS A SPECIALIZED COBALT-BASED CAST SUPERALLOY DESIGNED FOR SEVERE ELEVATED-TEMPERATURE SERVICE. ITS CHARACTERISTIC CHEMISTRY INCLUDES APPROXIMATELY 19% CHROMIUM, 7.5% TANTALUM, 4.5% TUNGSTEN AND 4.3% ALUMINUM, WITH COBALT FORMING THE BALANCE. ITS PRINCIPAL ENGINEERING RELEVANCE IS IN GAS-TURBINE AND AEROSPACE HOT-SECTION APPLICATIONS, ESPECIALLY STATIONARY COMPONENTS SUCH AS STATOR VANES. FOR MANUFACTURERS AND EXPORTERS, THE MOST IMPORTANT COMMERCIAL DISTINCTION IS THAT AIRESIST 215 SHOULD NOT BE ASSIGNED AN INVENTED ASTM, UNS, EN, DIN OR JIS EQUIVALENT. THE ALLOY IS DOCUMENTED AS ITS OWN CAST COBALT-ALLOY DESIGNATION, AND PRODUCT CERTIFICATION SHOULD BE BASED ON THE CUSTOMER'S APPLICABLE MATERIAL AND INSPECTION REQUIREMENTS. FOR , THE STRONGEST CONTENT STRATEGY IS TO COMBINE “AIRESIST 215 ROUND BAR, ” “AR-215, ” “COBALT-BASED SUPERALLOY, ” “AIRESIST 215 MANUFACTURER, ” “AIRESIST 215 SUPPLIER, ” “CHEMICAL COMPOSITION, ” “EQUIVALENT, ” “GAS TURBINE, ” “AEROSPACE ALLOY, ” “CAST COBALT ALLOY, ” AND “HIGH-TEMPERATURE ALLOY” WHILE AVOIDING TECHNICALLY UNSUPPORTED CLAIMS OF STANDARD EQUIVALENCY.