Cobalt #1
Class: ERCoCr-C
AWS: A5.21
Conforms to Certification: AWS A5.21 | ASME SFA A5.21
Weld Process: GTAW (tig)
| AWS Chemical Composition Requirements | |
| C = 2.0 – 3.0 | Mo = 1.0 max |
| Mn = 1.0 max | Fe = 3.0 max |
| Si = 2.0 max | W = 11.0 – 14.0 |
| Cr = 26 – 33 | Co = Remainder |
| Ni = 3.0 max | Other = 0.50 max |
Available Sizes
Call for more information
Application
Type #1bare wire/rod has the highest hardness of the cobalt alloys and is used to elevate temperature wear applications. Machine with carbide tools or grinding. It bonds well with stainless and other weldable grades of steel.
| Deposited Chemical Composition % (Typical) | |
| C = 2.4 | Mo = 0.10 |
| Mn = 0.06 | Fe = 2.3 |
| Si = 1.2 | W = 12.2 |
| Cr = 31.0 | Co = Balance |
| Ni = 2.2 | |
Deposited All Weld Metal Properties % (AW)
Hardness (2 layer) HRC 53 – 54
Deposited Charpy-V-Notch Impact Properties %
Not Applicable
Recommended Operation of Welding Rods
GTAW (tig)
| Diameter | Amps DCEN | Volts | Shielding Gas |
| 1/8 | 90 – 120 | 20 – 40 | argon |
| 5/32 | 120 – 140 | 20 – 40 | argon |
| 3/16 | 140 – 180 | 20 – 40 | argon |