Alleima® F1537 is a cobalt-chromium-molybdenum (CoCrMo) alloy, available with low and high carbon (C) content. Both alloys are characterized by high strength, wear resistance and corrosion resistance.
Standards
- ASTM: F1537, F799
- UNS: R31537, R31538
- ISO: 5832-12
Chemical composition
| Grade | C | Cr | Mo | Ni | Fe | Si | Mn | N | Co |
|---|---|---|---|---|---|---|---|---|---|
| Alleima® F1537 (Alloy 1, UNS R31537) | ≤ 0.14 | 26–30 | 5–7 | ≤1 | ≤0.75 | ≤1 | ≤1 | ≤0.25 | Bal |
| Alleima® F1537 (Alloy 2, UNS R31538) | 0.15–0.35 | 26–30 | 5–7 | ≤1 | ≤0.75 | ≤1 | ≤1 | ≤0.25 | Bal |
Applications
CoCrMo alloys are used by customers for joint replacement (hip, knee, shoulder) and fixation devices.
Forms of supply
Finishes and dimensions
Alleima® F1537 bar is offered in a comprehensive range of standard sizes from 10-80 mm diameter. The bar is supplied in the annealed, hot worked and warm worked conditions with a peeled or ground surface finish.
Lengths
Bar is delivered in 3.0-3.5 m straight lengths. Shorter lengths are available on request.
| Diameter, mm | Standard tolerance, mm |
|---|---|
| 10 | +/- 0.05 |
| >10–50.8 | +/- 0.065 |
| >50.8–80 | +/- 0.125 |
Alternative tolerances are available on request.
Mechanical properties
| Product form | Condition | Tensile strength Rm | Proof strength Rp0,2 | Elongation A,% | Hardness HRC | ||
|---|---|---|---|---|---|---|---|
| MPa min | ksi min | MPa min | ksi min | typical | typical | ||
| Bar | Annealed | 897 | 130 | 517 | 75 | 20 | 25 |
| Bar | Hot worked | 1000 | 145 | 700 | 101 | 12 | 28 |
| Bar | Warm worked | 1172 | 170 | 827 | 120 | 12 | 35 |
Physical properties
| Property | ||
|---|---|---|
| Density (20 °C) | 8.25 g/cm3 | 0.29 lb/in3 |
| Modulus of elasticity, x103 (20°C) | 240 MPa | 35 ksi |
| Specific heat capacity (20°C) | 452 J/(kg °C) | 0.11 Btu/(lb°F) |
| Thermal conductivity (20°C) | 13W/(m°C) | 7.5 Btu/(ft h °F) |
Disclaimer: Alleima is not providing any products or services that are intended or may be construed to be recommending or otherwise advising on, in any manner, the design, suitability, appropriateness or effectiveness, from a medical/biological/safety perspective, of any medical material, instrument and/or medical device.