UNS R30006 VIM+ESR ROUND BAR MANUFACTURING – PREMIUM STELLITE 6 COBALT ALLOY FOR EXTREME WEAR, CORROSION AND HIGH-TEMPERATURE SERVICE INTRODUCTION TO UNS R30006 VIM+ESR ROUND BAR MANUFACTURING UNS R30006 ROUND BAR, WIDELY KNOWN AS STELLITE 6, STELLITE 6 ALLOY, COBALT 6, OR A COBALT-CHROMIUM-TUNGSTEN WEAR-RESISTANT ALLOY, IS ONE OF THE MOST WIDELY RECOGNIZED COBALT-BASE MATERIALS FOR SEVERE WEAR, EROSION, CAVITATION, GALLING, CORROSION AND ELEVATED-TEMPERATURE SERVICE. UNS R30006 IS FUNDAMENTALLY A CAST/ROD COBALT ALLOY SYSTEM, WITH COBALT AS THE BALANCE AND SUBSTANTIAL CHROMIUM, TUNGSTEN AND CARBON ADDITIONS THAT PRODUCE A HARD, WEAR-RESISTANT MICROSTRUCTURE. PARMANU DHATU NIGAM STELLITE IDENTIFIES STELLITE 6 AS ITS MOST POPULAR GENERAL-PURPOSE STELLITE GRADE AND GIVES TYPICAL CHEMISTRY OF APPROXIMATELY 27–32% CR, 3–6% W AND 0.9–1.4% C. VIM+ESR MANUFACTURING ADDS A PREMIUM VACUUM-MELTING AND REMELTING ROUTE WHEN THE CUSTOMER REQUIRES EXCEPTIONAL CONTROL OF CHEMISTRY, CLEANLINESS, SEGREGATION, INCLUSIONS AND INTERNAL METALLURGICAL CONSISTENCY. FOR DEMANDING UNS R30006 VIM+ESR ROUND BAR MANUFACTURING, THE PROCESS CAN BE ENGINEERED AROUND VACUUM INDUCTION MELTING FOLLOWED BY ELECTROSLAG REMELTING, WITH SUBSEQUENT CONDITIONING, THERMAL PROCESSING AND PRECISION MACHINING ACCORDING TO THE AGREED PRODUCT SPECIFICATION. THE RESULT IS A SPECIALIZED COBALT ALLOY ROUND BAR INTENDED FOR APPLICATIONS WHERE CONVENTIONAL STAINLESS STEELS, TOOL STEELS AND MANY NICKEL ALLOYS CANNOT PROVIDE THE REQUIRED COMBINATION OF WEAR RESISTANCE, CORROSION RESISTANCE, CAVITATION RESISTANCE, HOT HARDNESS AND DIMENSIONAL STABILITY. WHAT IS UNS R30006? UNS R30006 IS THE UNIFIED NUMBERING SYSTEM DESIGNATION ASSOCIATED WITH STELLITE 6, A COBALT-BASED CHROMIUM-TUNGSTEN-CARBON ALLOY. COMMON COMMERCIAL AND INDUSTRY TERMINOLOGY INCLUDES: • UNS R30006 • STELLITE 6 • STELLITE 6 ALLOY • COBALT 6 • COBALT ALLOY 6 • CO-CR-W-C ALLOY • COBALT-CHROMIUM-TUNGSTEN ALLOY • COBALT-BASED WEAR-RESISTANT ALLOY • COCRW ALLOY • COCRW6 • R30006 COBALT ALLOY • STELLITE 6 ROUND BAR • STELLITE 6 ROD • R30006 ROD • COBALT ALLOY ROUND BAR • COBALT ALLOY BAR • COBALT-CHROMIUM ROUND BAR “STELLITE” IS A TRADEMARK ASSOCIATED WITH PARMANU DHATU NIGAM/STELLITE, SO PROCUREMENT DOCUMENTS SHOULD DISTINGUISH THE TRADEMARKED DESIGNATION FROM THE GENERIC UNS R30006 MATERIAL DESIGNATION. PARMANU DHATU NIGAM'S PUBLISHED SPECIFICATION INFORMATION IDENTIFIES UNS R30006 WITH STELLITE 6 AND LISTS MULTIPLE PRODUCT-SPECIFIC AMS DESIGNATIONS. CHEMICAL CHARACTERISTICS OF UNS R30006 THE PERFORMANCE OF STELLITE 6 IS PRIMARILY GENERATED BY ITS COBALT MATRIX TOGETHER WITH CHROMIUM, TUNGSTEN AND CARBON. TYPICAL PUBLISHED CHEMISTRY IS CENTERED AROUND: COBALT: BALANCE CHROMIUM: APPROXIMATELY 27–32% TUNGSTEN: APPROXIMATELY 3–6% CARBON: APPROXIMATELY 0.9–1.4% ADDITIONAL ELEMENTS SUCH AS NICKEL, IRON, SILICON, MANGANESE AND MOLYBDENUM MAY BE CONTROLLED WITHIN THE APPLICABLE PRODUCT SPECIFICATION. PARMANU DHATU NIGAM'S PUBLISHED STELLITE 6 INFORMATION GIVES CR AT 27–32%, W AT 3–6%, AND C AT 0.9–1.4%. THIS CHEMISTRY PROMOTES CARBIDE-CONTAINING MICROSTRUCTURES THAT PROVIDE THE ALLOY'S CHARACTERISTIC COMBINATION OF HARDNESS AND WEAR RESISTANCE. THE HIGH CHROMIUM CONTENT ALSO CONTRIBUTES TO CORROSION AND OXIDATION RESISTANCE, WHILE TUNGSTEN-BEARING HARD PHASES HELP MAINTAIN PERFORMANCE UNDER SEVERE ABRASIVE AND EROSIVE CONDITIONS. WHY VIM+ESR IS USED FOR UNS R30006 ROUND BAR A CONVENTIONAL CAST-PRODUCT ROUTE AND A PREMIUM VIM+ESR ROUTE SHOULD NOT AUTOMATICALLY BE TREATED AS IDENTICAL MANUFACTURING PROCESSES. VACUUM INDUCTION MELTING (VIM) PROVIDES CONTROLLED MELTING UNDER VACUUM OR CONTROLLED ATMOSPHERE CONDITIONS. THIS CAN HELP REDUCE UNWANTED ATMOSPHERIC CONTAMINATION AND PERMIT CLOSE CONTROL OF ALLOY CHEMISTRY. ELECTROSLAG REMELTING (ESR) IS THEN USED TO REMELT AND RESOLIDIFY THE PRIMARY ELECTRODE UNDER A CONTROLLED SLAG ENVIRONMENT. PROPERLY CONTROLLED ESR CAN IMPROVE METALLURGICAL CLEANLINESS, REDUCE CERTAIN TYPES OF SEGREGATION AND PROVIDE A REFINED, MORE UNIFORM INGOT STRUCTURE. FOR PREMIUM UNS R30006 VIM+ESR ROUND BAR, THE ROUTE MAY THEREFORE BE: RAW-MATERIAL SELECTION → VIM MELTING → CHEMISTRY CORRECTION → VIM ELECTRODE CASTING → ESR REMELTING → HOMOGENIZATION/THERMAL CONDITIONING → FORGING OR HOT WORKING WHERE SPECIFIED → HEAT TREATMENT → STRAIGHTENING → SURFACE CONDITIONING → CENTERLESS GRINDING OR TURNING → DIMENSIONAL INSPECTION → NDT → FINAL TESTING → CERTIFICATION. BECAUSE UNS R30006 IS WIDELY SUPPLIED AS A CAST ALLOY AND HARDFACING ROD, A VIM+ESR ROUND BAR SHOULD BE SOLD AGAINST THE SPECIFIC PURCHASE SPECIFICATION AND MANUFACTURING CONDITION, RATHER THAN IMPLYING THAT EVERY R30006 BAR IS AUTOMATICALLY COVERED BY EVERY STELLITE 6 STANDARD. UNS R30006 VIM+ESR ROUND BAR MANUFACTURING PROCESS 1) RAW MATERIAL SELECTION MANUFACTURING BEGINS WITH CONTROLLED COBALT, CHROMIUM, TUNGSTEN, CARBON AND OTHER ALLOYING ADDITIONS. HIGH-PURITY CHARGE MATERIALS ARE SELECTED TO CONTROL: • SULFUR • PHOSPHORUS • OXYGEN • NITROGEN • LEAD • BISMUTH • OTHER TRAMP ELEMENTS • METALLIC INCLUSIONS • UNDESIRABLE RESIDUALS FOR DEMANDING VIM+ESR PRODUCTION, CHARGE CONTROL IS CRITICAL BECAUSE THE MATERIAL'S FINAL CLEANLINESS DEPENDS NOT ONLY ON THE NOMINAL ALLOY CHEMISTRY BUT ALSO ON THE QUALITY OF THE STARTING CHARGE. 2) VACUUM INDUCTION MELTING THE SELECTED CHARGE IS MELTED INSIDE A VACUUM INDUCTION FURNACE. VIM ENABLES CLOSE CONTROL OF ALLOY CHEMISTRY WHILE LIMITING EXPOSURE TO ATMOSPHERIC GASES. DURING THE MELTING CYCLE, THE MANUFACTURER MONITORS MELT TEMPERATURE, ALLOY ADDITIONS, VACUUM CONDITIONS AND FINAL CHEMISTRY. SAMPLES ARE ANALYZED BEFORE CASTING THE VIM ELECTRODE. 3) CHEMISTRY ADJUSTMENT THE MELT IS ADJUSTED TO THE CUSTOMER'S SPECIFIED CHEMICAL LIMITS. PARTICULAR ATTENTION IS GIVEN TO CHROMIUM, TUNGSTEN AND CARBON BECAUSE THESE ELEMENTS STRONGLY AFFECT CARBIDE FORMATION, HARDNESS, WEAR RESISTANCE AND MICROSTRUCTURAL STABILITY. A MILL TEST CERTIFICATE FOR PREMIUM R30006 SHOULD IDENTIFY THE ACTUAL HEAT CHEMISTRY RATHER THAN MERELY REPORTING A GENERIC NOMINAL COMPOSITION. 4) VIM ELECTRODE CASTING AFTER CHEMICAL ACCEPTANCE, THE MOLTEN ALLOY IS CAST INTO AN ELECTRODE SUITABLE FOR SUBSEQUENT ESR. ELECTRODE QUALITY IS IMPORTANT BECAUSE DEFECTS INTRODUCED AT THIS STAGE CAN INFLUENCE THE REMELTED INGOT. 5) ELECTROSLAG REMELTING DURING ESR, THE VIM ELECTRODE IS SLOWLY REMELTED THROUGH A CONTROLLED MOLTEN SLAG POOL. THE PROCESS CAN IMPROVE INTERNAL QUALITY AND METALLURGICAL CONSISTENCY WHEN APPROPRIATELY DESIGNED. IT IS PARTICULARLY ATTRACTIVE FOR SPECIALIZED HIGH-INTEGRITY COBALT ALLOY PRODUCTS WHERE CUSTOMERS REQUIRE INCREASED CONTROL OVER INTERNAL CLEANLINESS AND STRUCTURE. 6) ESR INGOT CONDITIONING AFTER ESR, THE INGOT IS INSPECTED AND PREPARED FOR FURTHER PROCESSING. DEPENDING ON THE REQUIRED DIAMETER AND MANUFACTURING ROUTE, THE INGOT CAN UNDERGO CONTROLLED THERMAL PROCESSING, FORGING OR OTHER HOT-WORKING OPERATIONS. FOR LARGE PREMIUM ROUND BAR, WORKING REDUCTIONS ARE SELECTED TO OBTAIN THE DESIRED INTERNAL STRUCTURE WITHOUT INTRODUCING DAMAGING DEFECTS. 7) HOT WORKING AND FORGING WHERE A WROUGHT-TYPE ROUND BAR IS REQUIRED, CONTROLLED HOT WORKING MAY BE USED TO CONVERT THE ESR INGOT INTO BILLET OR BAR. FORGING AND HOT WORKING MUST BE CAREFULLY CONTROLLED BECAUSE COBALT-CHROMIUM-TUNGSTEN ALLOYS CONTAINING SUBSTANTIAL CARBIDE-FORMING ELEMENTS CAN BE CONSIDERABLY MORE DIFFICULT TO PROCESS THAN CONVENTIONAL STEELS. THE OBJECTIVE IS TO ACHIEVE: • UNIFORM CROSS-SECTION • SOUND INTERNAL STRUCTURE • CONTROLLED CARBIDE MORPHOLOGY • REDUCED INTERNAL SEGREGATION • IMPROVED DIMENSIONAL CONSISTENCY • LOW DEFECT DENSITY 8) HEAT TREATMENT HEAT TREATMENT IS DETERMINED BY THE SPECIFIC PRODUCT SPECIFICATION AND CUSTOMER REQUIREMENTS. THE MANUFACTURER MUST CONTROL HEATING RATE, SOAKING TEMPERATURE, ATMOSPHERE, HOLDING TIME AND COOLING PRACTICE. BECAUSE STELLITE 6 IS PRIMARILY VALUED FOR ITS CARBIDE-STRENGTHENED WEAR-RESISTANT STRUCTURE, HEAT TREATMENT IS NOT SIMPLY SELECTED ACCORDING TO GENERIC STEEL PRACTICES. 9) MACHINING AND GRINDING UNS R30006 IS SUBSTANTIALLY MORE DIFFICULT TO MACHINE THAN ORDINARY CARBON AND STAINLESS STEELS. PARMANU DHATU NIGAM NOTES THAT STELLITE 6 CAN BE TURNED USING CARBIDE TOOLING. TYPICAL FINISHING OPERATIONS FOR PRECISION ROUND BAR INCLUDE: ROUGH TURNING → SEMI-FINISHING → STRAIGHTENING → CENTERLESS GRINDING → POLISHING OR FINAL MACHINING. BECAUSE CARBIDE-RICH MICROSTRUCTURES CAN CAUSE SIGNIFICANT TOOL WEAR, CUTTING PARAMETERS, INSERT GEOMETRY, COOLANT STRATEGY AND DEPTH OF CUT MUST BE SELECTED FOR COBALT-ALLOY MACHINING. 10) DIMENSIONAL INSPECTION FINAL R30006 ROUND BARS CAN BE CHECKED FOR: • OUTSIDE DIAMETER • STRAIGHTNESS • OVALITY • LENGTH • SURFACE CONDITION • CONCENTRICITY • END SQUARENESS • SURFACE ROUGHNESS FOR HIGH-INTEGRITY APPLICATIONS, DIMENSIONAL INSPECTION SHOULD BE CORRELATED TO THE PURCHASE DRAWING AND AGREED TOLERANCE CLASS. SURFACE FINISH OF UNS R30006 ROUND BAR DEPENDING ON THE APPLICATION, UNS R30006 VIM+ESR ROUND BAR CAN BE SUPPLIED IN CONDITIONS SUCH AS: • HOT FINISHED • PEELED • TURNED • GROUND • CENTERLESS GROUND • PRECISION GROUND • POLISHED GROUND AND PRECISION-GROUND R30006 BARS ARE PARTICULARLY ATTRACTIVE FOR COMPONENTS REQUIRING CONTROLLED DIAMETER, LOW SURFACE ROUGHNESS AND IMPROVED MACHINING ALLOWANCE. NON-DESTRUCTIVE TESTING FOR VIM+ESR R30006 ROUND BAR HIGH-INTEGRITY ORDERS MAY REQUIRE SEVERAL NDT TECHNIQUES. DEPENDING ON DIAMETER AND CUSTOMER SPECIFICATION, TESTING CAN INCLUDE: ULTRASONIC TESTING: FOR INTERNAL DISCONTINUITIES. LIQUID PENETRANT INSPECTION: FOR SURFACE-BREAKING DEFECTS. VISUAL INSPECTION: FOR CRACKS, LAPS, SEAMS, GOUGES AND OTHER SURFACE CONDITIONS. RADIOGRAPHIC EXAMINATION: WHERE SPECIFICALLY REQUIRED BY THE APPLICABLE PRODUCT OR PURCHASE SPECIFICATION. BECAUSE ESR IS OFTEN SELECTED FOR ENHANCED INTERNAL INTEGRITY, CUSTOMERS PURCHASING PREMIUM VIM+ESR MATERIAL MAY REQUIRE DETAILED NDT DOCUMENTATION IN ADDITION TO CHEMICAL AND MECHANICAL CERTIFICATION. MECHANICAL AND METALLURGICAL CHARACTERISTICS STELLITE 6 IS PARTICULARLY RECOGNIZED FOR HIGH HARDNESS, WEAR RESISTANCE AND RESISTANCE TO MECHANICAL AND CHEMICAL DEGRADATION. PARMANU DHATU NIGAM LISTS TYPICAL STELLITE 6 HARDNESS IN THE APPROXIMATELY 36–45 HRC RANGE AND A TYPICAL TENSILE STRENGTH OF APPROXIMATELY 850 MPA, ALTHOUGH ACTUAL VALUES DEPEND ON PRODUCT FORM, PROCESSING HISTORY AND TEST CONDITION. THE MANUFACTURER SHOULD THEREFORE NEVER SUBSTITUTE A GENERIC HARDNESS OR TENSILE VALUE FOR THE REQUIREMENTS OF THE CUSTOMER'S ACTUAL SPECIFICATION. IMPORTANT PERFORMANCE CHARACTERISTICS INCLUDE: HIGH WEAR RESISTANCE: SUITABLE FOR ABRASIVE, EROSIVE AND SLIDING-WEAR ENVIRONMENTS. CAVITATION RESISTANCE: PARTICULARLY VALUABLE FOR VALVE AND FLUID-HANDLING APPLICATIONS. GALLING RESISTANCE: USEFUL FOR MATING COMPONENTS SUBJECTED TO METAL-TO-METAL CONTACT. CORROSION RESISTANCE: CHROMIUM-RICH CHEMISTRY PROVIDES RESISTANCE IN MANY AGGRESSIVE ENVIRONMENTS. HIGH-TEMPERATURE HARDNESS: STELLITE 6 MAINTAINS USEFUL HARDNESS AT ELEVATED TEMPERATURE. THERMAL STABILITY: SUITABLE FOR REPEATED HEATING AND COOLING CONDITIONS. INTERNATIONAL EQUIVALENTS AND CROSS-REFERENCES FOR UNS R30006 THE MOST IMPORTANT INTERNATIONALLY USED DESIGNATIONS INCLUDE: UNS: R30006 COMMERCIAL/TRADE DESIGNATION: STELLITE 6 GENERIC TRADE DESIGNATION: COBALT 6 / COBALT ALLOY 6 CHEMISTRY DESIGNATION: CO-CR-W-C / COCRW CHINESE-STYLE DESIGNATION FOUND IN INDUSTRY CROSS-REFERENCE LITERATURE: COCRW6 GERMAN/EUROPEAN CROSS-REFERENCE FREQUENTLY PUBLISHED: DIN/EN 2.4771 SEVERAL SUPPLIER DATABASES ASSOCIATE R30006 WITH DIN/EN 2.4771 AND COCRW6, WHILE OTHER COMMERCIAL DATABASES PUBLISH DIFFERENT MATERIAL NUMBERS SUCH AS 2.4783) THESE CROSS-REFERENCES SHOULD THEREFORE BE TREATED AS COMMERCIAL EQUIVALENCE REFERENCES RATHER THAN AUTOMATIC ONE-TO-ONE SUBSTITUTIONS; THE EXACT CHEMISTRY AND PRODUCT FORM SHOULD BE CONFIRMED BEFORE PROCUREMENT. THAT DISTINCTION IS PARTICULARLY IMPORTANT FOR VIM+ESR ROUND BAR, BECAUSE AN EQUIVALENT CHEMICAL DESIGNATION DOES NOT NECESSARILY MEAN THAT THE CORRESPONDING STANDARD COVERS THE SAME MELTING ROUTE, PRODUCT FORM, MECHANICAL PROPERTIES OR QUALITY REQUIREMENTS. ASTM, AMS, AWS AND ASME REFERENCES AMS 5387 AND AMS 5373 PARMANU DHATU NIGAM STELLITE LISTS AMS 5387 AND AMS 5373 FOR STELLITE 6 CASTINGS. THESE REFERENCES ARE THEREFORE IMPORTANT WHEN THE REQUESTED PRODUCT IS A CASTING OR IS BEING PRODUCED AGAINST A CASTING SPECIFICATION. AMS 5788 PARMANU DHATU NIGAM ALSO LISTS AMS 5788 FOR STELLITE 6 ROD AND WIRE. FOR CUSTOMERS SEARCHING FOR UNS R30006 ROUND BAR, STELLITE 6 ROD, STELLITE 6 HARDFACING ROD OR COBALT ALLOY ROD, AMS 5788 IS ONE OF THE MOST RELEVANT SPECIFICATION REFERENCES. AWS A5.21 / ASME SFA 5.21 FOR WELDING-ROD APPLICATIONS, STELLITE 6 IS ASSOCIATED WITH: ERCOCR-A UNDER AWS A5.21 / ASME BPVC SECTION IIC SFA 5.21. PARMANU DHATU NIGAM LISTS ERCOCR-A FOR ROD AND THE ASSOCIATED WIRE CLASSIFICATION SEPARATELY. AWS A5.13 / ASME SFA 5.13 FOR COATED ELECTRODE APPLICATIONS, STELLITE 6 IS ASSOCIATED WITH: ECOCR-A UNDER AWS A5.13 / ASME BPVC SECTION IIC SFA 5.13. IMPORTANT ASTM CLARIFICATION SEARCH RESULTS SOMETIMES INCORRECTLY PLACE ASTM F75 ALONGSIDE STELLITE 6/R30006) ASTM F75 IS ACTUALLY THE SPECIFICATION FOR COBALT-28 CHROMIUM-6 MOLYBDENUM ALLOY, UNS R30075, PRINCIPALLY ASSOCIATED WITH SURGICAL IMPLANT CASTING MATERIAL—NOT UNS R30006. SIMILARLY, MEDICAL-DEVICE REFERENCES SUCH AS ISO 5832-4:2024 COVER COBALT-CHROMIUM-MOLYBDENUM CASTING ALLOY FOR SURGICAL IMPLANTS. THEY SHOULD NOT BE TREATED AS AN AUTOMATIC SPECIFICATION FOR ORDINARY INDUSTRIAL UNS R30006 STELLITE 6 ROUND BAR. THIS DISTINCTION IS VALUABLE FOR PROCUREMENT TEAMS BECAUSE MANY ONLINE ALLOY-EQUIVALENCE PAGES COMBINE ADJACENT COBALT-ALLOY DESIGNATIONS. STELLITE 6 VS STELLITE 6B UNS R30006 STELLITE 6 SHOULD NOT BE CONFUSED WITH STELLITE 6B / UNS R30016. PARMANU DHATU NIGAM IDENTIFIES R30006 AS STELLITE 6 WHILE SEPARATELY IDENTIFYING R30016 AS STELLITE 6B. STELLITE 6 IS COMMONLY ASSOCIATED WITH CASTINGS AND HARDFACING ROD, WHEREAS STELLITE 6B IS A DISTINCT WROUGHT COBALT ALLOY GRADE. CONSEQUENTLY, A PURCHASING SPECIFICATION REQUESTING R30006 VIM+ESR ROUND BAR SHOULD NOT AUTOMATICALLY BE REPLACED WITH R30016/6B SIMPLY BECAUSE BOTH GRADES ARE DESCRIBED AS STELLITE 6-TYPE COBALT ALLOYS. ADVANTAGES OF PREMIUM UNS R30006 VIM+ESR ROUND BAR THE VIM+ESR ROUTE CAN BE ATTRACTIVE FOR SPECIALIZED APPLICATIONS REQUIRING A HIGHER DEGREE OF METALLURGICAL CONTROL. POTENTIAL ADVANTAGES INCLUDE: CONTROLLED CHEMISTRY: TIGHT CONTROL OF ALLOYING AND RESIDUAL ELEMENTS. IMPROVED CLEANLINESS: OPTIMIZED MELTING AND REMELTING CAN REDUCE UNDESIRABLE INTERNAL CONTAMINATION. BETTER INTERNAL CONSISTENCY: ESR PROVIDES CONTROLLED DIRECTIONAL SOLIDIFICATION AND REMELTING. REDUCED SEGREGATION: SUITABLE ESR PROCESSING CAN IMPROVE CHEMICAL UNIFORMITY THROUGH THE INGOT. HIGH-INTEGRITY MATERIAL: VALUABLE FOR CRITICAL WEAR COMPONENTS AND SPECIALIZED ENGINEERING PRODUCTS. CONTROLLED MACHINING STOCK: PRECISION GRINDING CAN PROVIDE TIGHT DIMENSIONAL TOLERANCES. APPLICATIONS OF UNS R30006 ROUND BAR STELLITE 6 IS WIDELY USED IN SEVERE WEAR AND HIGH-TEMPERATURE APPLICATIONS. OIL AND GAS R30006 MAY BE SELECTED FOR: • VALVE SEATS • VALVE GATES • VALVE TRIM • CHOKES • PUMP COMPONENTS • SLEEVES • WEAR SURFACES POWER GENERATION APPLICATIONS INCLUDE: • STEAM-VALVE COMPONENTS • VALVE SEATS • PUMP COMPONENTS • EROSION-RESISTANT PARTS • TURBINE-RELATED WEAR COMPONENTS PARMANU DHATU NIGAM SPECIFICALLY IDENTIFIES VALVE SEATS AND GATES, PUMP SHAFTS AND BEARINGS, EROSION SHIELDS AND ROLLING-CONTACT APPLICATIONS FOR STELLITE 6. CHEMICAL PROCESSING THE COMBINATION OF WEAR AND CORROSION RESISTANCE MAKES STELLITE 6 ATTRACTIVE FOR: • VALVE COMPONENTS • PUMP PARTS • SCRAPERS • WEAR-RESISTANT SHAFTS • SEALING SURFACES AUTOMOTIVE AND ENGINE COMPONENTS POTENTIAL USES INCLUDE: • VALVE SEATS • HIGH-TEMPERATURE WEAR COMPONENTS • ENGINE WEAR SURFACES • SPECIALIZED ROTATING COMPONENTS INDUSTRIAL MACHINERY R30006 CAN BE USED FOR: • BEARINGS • BUSHINGS • CUTTING AND TRIMMING COMPONENTS • WEAR SLEEVES • PUMP PARTS • SLIDING INTERFACES • EROSION-RESISTANT COMPONENTS WHY STELLITE 6 IS USED INSTEAD OF CONVENTIONAL STEEL IN MANY APPLICATIONS, THE MAJOR PROBLEM IS NOT SIMPLY TENSILE STRENGTH. THE CHALLENGE IS SIMULTANEOUS EXPOSURE TO: WEAR + TEMPERATURE + CORROSION + CAVITATION + GALLING + MECHANICAL CONTACT. A HARDENED STEEL MAY OFFER EXCELLENT ROOM-TEMPERATURE HARDNESS BUT LOSE HARDNESS OR CORROSION PERFORMANCE AT ELEVATED TEMPERATURE. STELLITE 6 WAS DEVELOPED AROUND A DIFFERENT PERFORMANCE PHILOSOPHY: A COBALT-RICH MATRIX COMBINED WITH CHROMIUM, TUNGSTEN AND CARBON-BASED HARD PHASES. THIS IS WHY STELLITE 6 ROUND BAR, UNS R30006 ROD, AND COBALT ALLOY BAR REMAIN IMPORTANT SEARCH AND PROCUREMENT TERMS FOR SEVERE-SERVICE ENGINEERING. MACHINING UNS R30006 ROUND BAR MACHINING STELLITE 6 REQUIRES PRODUCTION METHODS APPROPRIATE FOR COBALT-BASE WEAR ALLOYS. THE MACHINING STRATEGY MAY INCLUDE: • RIGID MACHINE SETUP • CARBIDE CUTTING TOOLS • CONTROLLED CUTTING SPEEDS • REDUCED CHATTER • POSITIVE COOLANT MANAGEMENT • CONSERVATIVE FEEDS WHERE REQUIRED • MINIMUM INTERRUPTED CUTTING • FINAL GRINDING FOR CRITICAL DIMENSIONS PARMANU DHATU NIGAM SPECIFICALLY CONFIRMS THAT STELLITE 6 CAN BE TURNED WITH CARBIDE TOOLING. FINAL GRINDING IS FREQUENTLY PREFERRED FOR CLOSE-TOLERANCE COMPONENTS BECAUSE GRINDING CAN PROVIDE BETTER DIMENSIONAL CONTROL AND SURFACE FINISH THAN AGGRESSIVE MACHINING OF A HARD CARBIDE-CONTAINING COBALT ALLOY. WELDING AND HARDFACING CONSIDERATIONS STELLITE 6 IS HEAVILY ASSOCIATED WITH HARDFACING. TYPICAL TECHNOLOGIES INCLUDE: • GTAW/TIG • GMAW/MIG • OXY-FUEL WELDING • PTA • LASER CLADDING • OTHER CONTROLLED DEPOSITION METHODS FOR WELDING CONSUMABLES, THE RELEVANT DESIGNATION CAN BE ERCOCR-A UNDER AWS A5.21, WHILE COATED ELECTRODES USE ECOCR-A UNDER AWS A5.13. THE EXACT WELDING PROCEDURE SHOULD BE QUALIFIED FOR THE SUBSTRATE, DEPOSIT THICKNESS, DILUTION, PREHEAT, INTERPASS TEMPERATURE AND COOLING CONDITIONS. QUALITY ASSURANCE FOR UNS R30006 VIM+ESR ROUND BAR A PREMIUM MANUFACTURER'S INSPECTION PACKAGE CAN INCLUDE: HEAT CHEMISTRY CERTIFICATE: ACTUAL ELEMENTAL ANALYSIS. VIM HEAT RECORD: FURNACE AND MELTING INFORMATION WHERE CONTRACTUALLY AVAILABLE. ESR REMELTING RECORD: REMELTING TRACEABILITY AND PROCESS INFORMATION WHERE SPECIFIED. MECHANICAL TEST REPORT: TENSILE, YIELD, ELONGATION OR OTHER SPECIFIED TESTING. HARDNESS TEST: ROCKWELL OR BRINELL AS REQUIRED. METALLOGRAPHY: MICROSTRUCTURAL EXAMINATION WHERE SPECIFIED. ULTRASONIC TESTING: INTERNAL QUALITY INSPECTION. LIQUID PENETRANT TESTING: SURFACE-DEFECT INSPECTION. DIMENSIONAL INSPECTION REPORT: DIAMETER, STRAIGHTNESS AND LENGTH. EN 10204 CERTIFICATE: WHERE REQUESTED BY CONTRACT, COMMONLY 3.1 OR 3.2 DEPENDING ON CUSTOMER REQUIREMENTS. SUPPLY FORMS UNS R30006/STELLITE 6 CAN BE ENCOUNTERED IN SEVERAL PRODUCT CONFIGURATIONS, INCLUDING: • ROUND BAR • ROD • HARDFACING ROD • CAST BAR • CASTINGS • WIRE • WELDING CONSUMABLES • CUSTOM-MACHINED COMPONENTS PARMANU DHATU NIGAM SPECIFICALLY LISTS R30006 FOR RODS AND CASTINGS AND AMS 5788 FOR ROD/WIRE PRODUCTS. FOR A VIM+ESR ROUND BAR, HOWEVER, THE EXACT PRODUCT FORM AND MANUFACTURING CONDITION SHOULD BE EXPLICITLY STATED ON THE PURCHASE ORDER. COMMON GLOBAL PROCUREMENT KEYWORDS FOR UNS R30006 HIGH-INTENT INTERNATIONAL SEARCH TERMINOLOGY SURROUNDING THIS MATERIAL INCLUDES: UNS R30006 ROUND BAR UNS R30006 BAR UNS R30006 ROD R30006 COBALT ALLOY R30006 ROUND BAR MANUFACTURER R30006 ROUND BAR SUPPLIER STELLITE 6 ROUND BAR STELLITE 6 ROD STELLITE 6 BAR STELLITE 6 ALLOY ROUND BAR STELLITE 6 MANUFACTURER STELLITE 6 SUPPLIER STELLITE 6 STOCKIST STELLITE 6 FORGING STELLITE 6 CASTING STELLITE 6 HARDFACING ROD STELLITE 6 WELDING ROD STELLITE 6 COBALT ALLOY COBALT 6 ROUND BAR COBALT ALLOY ROUND BAR COBALT CHROMIUM TUNGSTEN ALLOY COBALT WEAR RESISTANT ALLOY COBALT BASED ALLOY BAR COBALT ALLOY ROD COCRW ROUND BAR COCRW ALLOY COCRW6 ALLOY AMS 5788 ROD AMS 5387 STELLITE 6 AMS 5373 STELLITE 6 ERCOCR-A ROD AWS A5.21 ERCOCR-A STELLITE 6 VIM ESR UNS R30006 VIM ESR STELLITE 6 VACUUM MELTED BAR STELLITE 6 ESR BAR VIM ESR COBALT ALLOY PREMIUM COBALT ALLOY ROUND BAR WEAR RESISTANT COBALT ALLOY HIGH TEMPERATURE COBALT ALLOY CORROSION RESISTANT COBALT ALLOY CAVITATION RESISTANT ALLOY GALLING RESISTANT COBALT ALLOY THESE TERMS CAPTURE THE PRINCIPAL COMMERCIAL, ENGINEERING, MATERIAL-IDENTIFICATION AND PROCUREMENT SEARCH INTENTS USED AROUND R30006 AND STELLITE 6. GLOBAL NAMES AND TRADE TERMINOLOGY DEPENDING ON COUNTRY AND INDUSTRY, BUYERS MAY SEARCH FOR THE MATERIAL USING DIFFERENT TERMINOLOGY. IN THE UNITED STATES AND AEROSPACE/INDUSTRIAL SUPPLY CHAINS, UNS R30006, AMS 5788, AMS 5387, AMS 5373, ERCOCR-A AND STELLITE 6 ARE IMPORTANT IDENTIFIERS. IN EUROPEAN-ORIENTED PURCHASING, SEARCHES MAY INCLUDE DIN/EN 2.4771, COCRW, COBALT CHROMIUM TUNGSTEN, AND STELLITE 6. IN CHINESE-LANGUAGE SUPPLY CHAINS, SEARCHES MAY INCLUDE COCRW6, 钴铬钨合金, 司太立6, AND STELLITE 6 BAR/ROD. IN GENERAL GLOBAL PROCUREMENT, THE STRONGEST COMMERCIAL TERMS INCLUDE STELLITE 6 ROUND BAR, UNS R30006 ROUND BAR, COBALT 6 ROUND BAR, STELLITE 6 ROD, AND COBALT ALLOY ROUND BAR. THE INTERNATIONAL CROSS-REFERENCE MUST ALWAYS BE VALIDATED AGAINST THE CHEMISTRY AND PRODUCT FORM BEFORE SUBSTITUTING ONE STANDARD FOR ANOTHER. WHY CHOOSE UNS R30006 VIM+ESR ROUND BAR? A HIGH-INTEGRITY UNS R30006 VIM+ESR ROUND BAR IS APPROPRIATE WHERE THE CUSTOMER NEEDS MORE THAN A GENERIC COBALT ALLOY. THE COMBINATION OF: COBALT-BASE METALLURGY + CHROMIUM + TUNGSTEN + CARBON + VACUUM INDUCTION MELTING + ELECTROSLAG REMELTING + CONTROLLED HOT WORKING + PRECISION FINISHING CAN PRODUCE A PREMIUM MATERIAL PLATFORM FOR SEVERE-SERVICE COMPONENTS REQUIRING HIGH RESISTANCE TO WEAR, EROSION, CAVITATION, GALLING AND ELEVATED-TEMPERATURE DEGRADATION. THE CRITICAL QUALIFICATION IS THAT THE FINAL MATERIAL MUST BE CERTIFIED TO THE ACTUAL CONTRACTUAL SPECIFICATION, NOT MERELY IDENTIFIED BY A TRADE NAME. CONCLUSION UNS R30006 VIM+ESR ROUND BAR MANUFACTURING REPRESENTS A SPECIALIZED ROUTE FOR PRODUCING HIGH-INTEGRITY STELLITE 6 / COBALT 6 MATERIAL FOR SEVERE INDUSTRIAL ENVIRONMENTS. THE MOST IMPORTANT MATERIAL IDENTIFIERS ARE UNS R30006, STELLITE 6, COBALT 6, COCRW AND COCRW6, WITH PRODUCT-SPECIFIC REFERENCES INCLUDING AMS 5387 AND AMS 5373 FOR CERTAIN CASTING PRODUCTS, AMS 5788 FOR ROD/WIRE, AWS A5.21 ERCOCR-A FOR ROD/WIRE WELDING CONSUMABLES, AND AWS A5.13 ECOCR-A FOR COATED ELECTRODES. FOR PRECISION PROCUREMENT, BUYERS SHOULD DISTINGUISH BETWEEN R30006 CASTING SPECIFICATIONS, WELDING-CONSUMABLE SPECIFICATIONS AND CUSTOM VIM+ESR ROUND-BAR REQUIREMENTS. THIS AVOIDS THE COMMON MISTAKE OF ASSIGNING AN UNRELATED COBALT-ALLOY OR MEDICAL-IMPLANT STANDARD TO AN INDUSTRIAL STELLITE 6 PRODUCT. WHEN MANUFACTURED WITH CONTROLLED VIM + ESR MELTING, CHEMISTRY VERIFICATION, CONTROLLED REMELTING, SUITABLE HOT WORKING, HEAT TREATMENT, PRECISION GRINDING AND COMPREHENSIVE INSPECTION, UNS R30006 ROUND BAR CAN SERVE DEMANDING APPLICATIONS ACROSS OIL AND GAS, POWER GENERATION, CHEMICAL PROCESSING, INDUSTRIAL MACHINERY, VALVES, PUMPS, WEAR SYSTEMS AND HIGH-TEMPERATURE ENGINEERING. FOR GLOBAL SEARCHES AND PROCUREMENT, THE HIGHEST-VALUE TERMINOLOGY CENTERS ON UNS R30006 ROUND BAR, STELLITE 6 ROUND BAR, STELLITE 6 ROD, COBALT 6 ROUND BAR, COBALT ALLOY BAR, COBALT-CHROMIUM-TUNGSTEN ALLOY, AMS 5788, AMS 5387, AMS 5373, ERCOCR-A AND VIM+ESR COBALT ALLOY.