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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
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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)

Diamter 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