Medium-alloyed wire for MAG welding of Cr Mo-alloyed creep resistant boiler and pipe steels subjected to operating temperatures up to 550˚C. This wire shall be welded using mixed shielding gas. Observe direction as to preweld heat treatment of materials.
Analysis of wire electrode% (typical value):
C
Si
Mn
Cr
Mo
0.1
0.4
0.6
1.3
0.5
Shielding gas: DIN EN 439-M2 1 (15-25% CO2, Balance Ar)
Mechanical properties of all-weld metal:
Tensile Strength ( N/mm 2 )
Yield Strength ( N/mm 2 )
Elongation Lo = 4d%
Impact energy (J) ISO - V 25°C
Heat Treatment
600 – 700
> 500
> 21
> 80
T
480 – 560
> 350
> 25
> 80
N+T
T = Heat treatment 30 min at 720C, furnace cooling to 300C. N + T = Norm + Treatment 30 min at 930C, air cooling + 30 min at 720C, furnace cooling to 300°C.
