English
Chinese
Description
Vacuum induction melted (VIM) and VIM+VAR remelted Cobalt-Chromium-Molybdenum (Co-Cr-Mo / CoCrMo) alloy products including investment casting ingots, forged round bars and HIP-treated blanks (ASTM F75 (cast), ASTM F799 / F1537 (wrought) . With over 10 years experience in specialty alloy export and vacuum furnace consumables (including our large split water-cooled copper crucibles), we supply medical grade and high performance engineering CoCrMo alloys to orthopedic implant manufacturers, dental labs, aerospace component makers and wear resistant part producers worldwide.
Technical Principle & Overview of Cobalt Chromium Molybdenum Alloy
In demanding biomechanical or extreme industrial environments, conventional stainless steels or titanium alloys may not have enough wear resistance or corrosion fatigue. CoCrMo alloy (typical composition: 58-65% Cobalt, 27-30% Chromium, 5-7% Molybdenum, controlled Carbon: 0.02-0.35%) forms a dense, self-passivating Cr2O3 oxide layer with excellent pitting corrosion resistance in chloride-rich and body fluid environments. Its unique strain-induced gamma(fcc) --> epsilon(hcp) phase transformation during cold work/sliding contact leads to a significant surface work-hardening, resulting in the alloy having an outstanding abrasive wear performance that is unmatched by 316L stainless steel.
PETROL STEEL’s medical grade CoCrMo is manufactured by vacuum induction melting and vacuum arc remelting (VIM+VAR) or electroslag remelting (ESR) in order to decrease the level of interstitial elements (O, N, S ≤ 30ppm) and non-metallic inclusions, which ensures both the homogeneity and traceability according to ISO 5832-4/ ASTM F75.
Material Grades & Applicable Standards of ASTM F75 / F799 Cobalt Chromium Molybdenum Alloy
Technical Principle & Overview of Cobalt Chromium Molybdenum Alloy
In demanding biomechanical or extreme industrial environments, conventional stainless steels or titanium alloys may not have enough wear resistance or corrosion fatigue. CoCrMo alloy (typical composition: 58-65% Cobalt, 27-30% Chromium, 5-7% Molybdenum, controlled Carbon: 0.02-0.35%) forms a dense, self-passivating Cr2O3 oxide layer with excellent pitting corrosion resistance in chloride-rich and body fluid environments. Its unique strain-induced gamma(fcc) --> epsilon(hcp) phase transformation during cold work/sliding contact leads to a significant surface work-hardening, resulting in the alloy having an outstanding abrasive wear performance that is unmatched by 316L stainless steel.
PETROL STEEL’s medical grade CoCrMo is manufactured by vacuum induction melting and vacuum arc remelting (VIM+VAR) or electroslag remelting (ESR) in order to decrease the level of interstitial elements (O, N, S ≤ 30ppm) and non-metallic inclusions, which ensures both the homogeneity and traceability according to ISO 5832-4/ ASTM F75.
Material Grades & Applicable Standards of ASTM F75 / F799 Cobalt Chromium Molybdenum Alloy
Typical Chemical Composition & Mechanical & Physical Properties (Typical Values) of Cobalt Chromium Molybdenum Alloys
All items are supplied with the full Mill Test Certificate (MTC) per EN 10204 3.1 / 3.2.
The technical attributes & the verified industrial values of ASTM F799 / F1537 CoCrMo Alloy
Principal Applications of CoCrMo
Orthopedic Implants Femoral heads, acetabular cups, tibial trays, spinal fixation rods (ASTM F75 / F1537)
Dental Restorations: Porcelain-fused-to-metal (PFM) copings and frameworks because of compatible CTE with dental ceramics
Industrial wear parts: Valve trim, pump sleeves, nozzles, extrusion dies exposed to abrasive slurries + corrosive media
Aerospace / High-Temp Components: Selected high-W variants (CoCrW / ASTM F90) used in gas turbine combustion zones.
Advanced Material ResearchBenchmark biomaterial for comparison to novel high-entropy/medium-entropy alloys
Production and Quality Control of Cobalt Chromium Molybdenum Alloy
CoCrMo alloy in the following processed forms is offered by PETROL STEEL CO., LTD:
Vacuum Melted Remelt Ingots, Φ80-Φ300 mm, weight 5-150 kg, cropped and surface conditioned
Forged / Swaged Round Bars: Φ20 – Φ200 mm, length on request, solution annealed + pickled
Custom Granules / Chips: For vacuum or centrifugal investment casting machines
Each lot is tested for:
Spectrochemical analysis (OES / XRF)
Ultrasonic Testing (UT) to ASTM E2375 or customer agreed spec
Surface dye penetrant inspection (PT) for wrought bars on request
Micro-etch grain flow inspection on forged products
Complete traceability documentation (heat number, melt route, chemical & mechanical test report)
Why choose PETROL STEEL CO., LTD for CoCrMo alloy?
Vacuum Melting Expertise: Supported by our internal expertise in vacuum induction furnaces and large copper crucible systems, providing ultra-clean heat practice.
Medical & Industrial Dual Compliance: Materials supplied to meet ISO 5832-4(implant) and general engineering specs.
Flexible Customization: Low carbon ELI versions, modified Mo/W ratios, non-standard bar sizes, rough machined blanks available.
Global Export Experience: Exported to Europe, North America, Japan, Korea and Southeast Asia with proper export packing and third party inspection support (SGS / TÜV / BV upon request).
Request a Quote / Technical Assistance of Cobalt Chromium Molybdenum ASTM F75 / F799
If you are looking for ASTM F75 CoCrMo casting ingots, ASTM F1537 forged round bars or need help choosing the right carbon level (high-carbon wear vs. low-carbon ELI biocompatibility) then please contact our technical sales team. Give us your dimensions, quantity and what standard you require – we generally reply within 24 working hours.
https://www.petrolsteel.com/Contact-us.html
Tel/Fax: +86 10 8599 9168
Cell/WhatsApp/ Wechat: 0086 159 0035 7871
Email: sales@petrolsteel.com, jackywinn@foxmail.com
