| Cobalt Base |
| Cast Alloy Designation | ILLIUM 21 | | UNS Number | R30021 |
| | Comparable Wrought Alloy | Stellite 21 | | Applicable ASTM Spec | AMS 5385 |
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| Chemical Composition |
| C | 0.20 - 0.30 | | Mn | 1 | | Si | 1 | | P | 0.04 | | S | 0.04 | | Cr | 25.0 - 29.0 |
| | Ni | 1.75 - 3.75 | | Mo | 5.0 - 6.0 | | Fe | 3.0 | | Cu | --- | | Other | B 0.007Fe 3.0 |
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| Mechanical Properties |
| Tensile (ksi) | --- | | Yield (ksi) | --- | | Elongation (%) | --- |
| | Reduction of area (%) | --- | | Hardness (Brinell) | 275 |
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| Notes |
| All single values are maximums unless noted otherwise.
Brinell hardness values and ranges represent typicals for the grade. |
| More Info |
| Weldable | Yes |
| Castability | Good |
| Processability | Good |
