Overview
R30021 is a non-galling high-temperature alloy offering heat and thermal shock resistance. This is a cobalt alloy. The nickel addition is capped at 3% max. This alloy provides great galling resistance, wear, and low melting temperature.
Typical Uses
Aerospace, bearings, housings, medical devices.
MetalTek Grade
MTEK 21
Similar Specifications
Cast UNS: R30021
Cast Grade:
Cast ASTM: A732
Military/AMS: AMS 5385
* AMS specifying investment casting.
Typical Chemical Composition (% by wt.)
Aluminum: n/a
Carbon: 1.8-2.5
Chromium: 23-26
Manganese: 0.5
Iron: 2.0 MAX
Copper: n/a
Nickel: 3.0 MAX
Lead: n/a
Tin: n/a
Silicon: 0.80-1.50
Zinc: n/a
Other: Co BAL; W 11-13
Minimum Mechanical Properties
Heat Treatment: Not Heat Treated