ASTM F75-23 UNS R30075 Co28Cr6Mo Cobalt Chromium Molybdenum Bar (φ65×200mm)

Overview

ASTM F75-23 (UNS R30075) is the globally recognized standard for cast Co-28Cr-6Mo cobalt chromium molybdenum alloy, specially developed for surgical implant casting and high-precision industrial casting applications. As a premium medical-grade master alloy, F75 exhibits outstanding biocompatibility, excellent wear resistance, high fatigue strength, and superior corrosion stability in human body fluid and harsh industrial environments.

Our φ65×200mm CAG-Co28Cr6Mo cast round bar is manufactured strictly according to the latest ASTM F75-23 standard, serving as high-purity remelting raw material for medical prosthetic castings and high-temperature precision components.

Chemical Composition (ASTM F75-23 Standard)

Alloy composition is precisely controlled within standard ranges to guarantee consistent casting performance and biological safety:

- Cobalt (Co): Balance

- Chromium (Cr): 27.0–30.0%

- Molybdenum (Mo): 5.0–7.0%

- Carbon (C): ≤0.35%

- Nickel (Ni): ≤0.5%

Strict control of trace elements and gas content ensures low inclusion, high purity, and stable casting fluidity.

Core Mechanical & Physical Properties

- Tensile Strength: ≥655 MPa

- Yield Strength: ≥450 MPa

- Elongation: ≥8%

- Hardness: HRC 25–35 (cast state)

- Density: 8.3 g/cm³

- Melting Point: Approximately 1400 °C

The alloy maintains stable mechanical properties under long-term dynamic load, friction environment, and corrosive conditions.

Key Advantages of ASTM F75 (UNS R30075)

1. Medical Grade Biocompatibility

Fully compliant with surgical implant material standards, non-toxic, non-allergenic, and stable in long-term human body service.

2. Excellent Wear & Fatigue Resistance

High hardness and structural stability effectively resist friction loss and cyclic fatigue failure, ideal for load-bearing prosthetic components.

3. Superior Corrosion Resistance

Chromium and molybdenum dual alloying provides strong resistance to oxidation, acid corrosion, and body fluid corrosion.

4. Perfect Casting Performance

Good fluidity and filling ability, suitable for complex thin-wall precision investment casting.

5. High Purity & Stable Batch Consistency

Produced by vacuum melting process, low gas content, low inclusions, stable composition, fully traceable batch records.

Main Applications

- Medical implant casting: hip joints, knee joints, dental frameworks, bone prosthetic parts

- High-precision industrial investment castings

- High-temperature and wear-resistant mechanical components

- Corrosion-resistant equipment parts

Product Specification

- Material: CAG-Co28Cr6Mo (Cast Cobalt Chromium Molybdenum)

- Standard: ASTM F75-23

- UNS Code: R30075

- Size: φ65mm × 200mm

- Condition: Cast state / Master alloy bar for remelting

- Service: Custom dimensions, full documents support, global export