Cobalt #21
Class: ERCoCr-E
AWS: A5.21
Conforms to Certification: AWS A5.21 | ASME SFA A5.21
| AWS Chemical Composition Requirements | |
| C = 0.15 – 0.45 | Mo = 4.5 – 7.0 |
| Mn = 1.5 max | Fe = 3.0 max |
| Si = 1.5 max | W = 0.50 max |
| Cr = 25 – 30 | Co = Remainder |
| Ni = 1.5 – 4.0 | Other = 0.50 max |
Available Sizes
Call for size and availability
Description
Cobalt #21 bare rod provide a low austenitic type deposit with excellent work hardenable, high temperature, strength, and impact resistance. It is a good choice for valve trim and steam and fluid control valve bodies and seals. It bonds well to all weldable steels, including stainless steel.
| Deposited Chemical Composition % (Typical) | |
| C = 0.24 | Mo = 5.4 |
| Mn = 0.8 | Fe = 1.7 |
| Si = 0.8 | W = 0.17 |
| Cr = 27.4 | Co = Balance |
| Ni = 2.73 | |