Cobalt-Chrome (CoCr) Alloys: Properties, ASTM Grades & Industrial Applications

Core Properties of Cobalt-Chrome Alloys

• High Strength & Durability – Excellent strength-to-weight ratio, capable of bearing long-term high mechanical stress and resisting structural deformation.
• Superior Corrosion Resistance – Chromium element forms a dense passive oxide film on the surface, effectively resisting oxidation, acid-base corrosion and chemical degradation.
• Excellent Biocompatibility – Non-toxic, tissue-friendly and allergy-free, fully compliant with medical implantation standards for long-term human body service.
• Outstanding Wear & Fatigue Resistance – Low friction coefficient and strong anti-fatigue performance, ensuring long service life in high-friction and cyclic working environments.
• Stable Heat Resistance – Maintains stable mechanical strength and structural integrity under continuous high-temperature conditions, ideal for gas turbine and aero-engine components.

Full Series of ZYTC Alloy CoCr Standard Grades

1. (UNS R30075) – Cast Co-Cr-Mo Alloy

• Main Composition: Cobalt (balance), Chromium 27–30%, Molybdenum 5–7%, trace C, Si, Mn
• Production Technology: Precision investment casting
• Core Features: Stable casting performance, good corrosion resistance, mature and reliable medical-grade alloy
• Typical Applications: Orthopedic hip & knee replacement implants, dental prosthetics, aerospace precision cast parts

2. ASTM F799 – Thermomechanically Processed Co-Cr-Mo Alloy

• Composition Feature: Similar chemical composition to F75
• Processing Difference: Optimized by forging and hot isostatic pressing (HIP) thermomechanical treatment
• Core Advantages: Higher mechanical strength, greatly improved fatigue resistance compared with ordinary cast F75
• Typical Applications: High-stress medical implant components, high-precision surgical instruments

3. ASTM F1537 – Wrought Co-Cr-Mo Alloy

• Processing Method: Hot working & wrought forming process
• Core Features: Excellent ductility, superior machinability and forming performance
• Typical Applications: Custom orthopedic implants, personalized dental frameworks, precision medical structural parts

4. ASTM F90 (UNS 605PH) – Co-Cr-W-Ni Medical Alloy

• Main Composition: Cobalt (balance), Chromium 19–21%, Tungsten 14–16%, Nickel 9–11%
• Core Features: Ultra-high tensile strength, excellent high-temperature and corrosion resistance
• Typical Applications: Cardiovascular stents, minimally invasive medical devices, aerospace high-strength fasteners

5. ASTM F562 (MP35N) – Co-Ni-Cr-Mo-Ti Super Alloy

• Main Composition: Cobalt 35%, Nickel 35%, Chromium 20%, Molybdenum 10%, Titanium trace elements
• Core Features: Industry-leading fatigue resistance, ultra-high biocompatibility and stability
• Typical Applications: Pacemaker leads, precision bone fixation devices, long-term implanted medical components

CoCr Alloy Grade Comparison Table

Industrial Application Fields of CoCr Alloys

1. Medical & Dental Industry

• Orthopedic implants: hip joints, knee replacement components
• Dental products: dental crowns, bridges, denture frameworks
• Surgical & intervention devices: surgical tools, cardiovascular stents, pacemaker accessories

2. Aerospace Industry

• Aero-engine turbine blades and heat-resistant components
• High-temperature fasteners and structural parts
• Supercharger and hot-section wear-resistant parts

3. Industrial Manufacturing

• High-wear mechanical parts
• Chemical corrosion-resistant equipment components
• High-temperature tooling and fixture parts

Why Choose ZYTC Alloy as Your CoCr Alloy Supplier

• Full ASTM Grade Coverage – Complete stock of F75, F799, F1537, F90, F562 MP35N cobalt-chrome alloys
• Medical & Aerospace Grade Quality – Strict raw material inspection and full-process quality control, compliant with international industry standards
• Custom Processing Service – Support casting, forging, rolling, cutting and personalized alloy solution customization
• Stable Batch Consistency – Eliminate performance deviation between batches, suitable for mass industrial production
• Global Supply Capacity – Fast delivery, competitive factory price and professional after-sales technical support
• Complete Certification – Provide full MTR test certificates to support customer project certification

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