Material Specification and Purpose
The ASTM F1058 standard establishes strict requirements for the chemical composition, mechanical properties, and metallurgical parameters of wrought cobalt-chromium-nickel-molybdenum alloys. The material is supplied as precision wire, drawn or rolled bars, and strip, intended for the manufacture of critical surgical implants and medical device components. EV Group China products meet international quality standards for biocompatible metals.
Chemical Composition of Cobalt Alloys per ASTM F1058 (%)
| Grade | C | Mn | Si | P | S | Co | Cr | Ni | Mo | Be | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Grade 1 (UNS R30003) | 0.15 | 1.5-2.5 | 1.20 | 0.015 | 0.015 | 39.0-41.0 | 19.0-21.0 | 14.0-16.0 | 6.0-8.0 | 0.001 | bal. |
| Grade 2 (UNS R30008) | 0.15 | 1.0-2.0 | 1.20 | 0.015 | 0.015 | 39.0-42.0 | 18.5-21.5 | 15.0-18.0 | 6.5-7.5 | 0.001 | bal. |