Rutile coated MMA electrode for welding stainless ferritic‐austenitic Cr‐Ni‐Mo steels (Duplex‐steel). Its weld metal contains approximately 25‐35% delta ferrite. The high‐strength and ductile weld metal exhibits good resistance to pitting, crevice corrosion and stress corrosion cracking in chloride‐bearing media. Fine metal droplet transfer, good fusion of joint faces, finely rippled bead surface, easy slag removal, easy arc striking and restriking.
Weld metal analysis in % (typical values):
C
Mn
Si
Cr
Ni
Mo
N
0.025
0.9
0.8
21.5
9
3.2
0.12
Mechanical Properties of all‐weld metal: (single values are typical values)
Tensile Strength ( N/mm 2 )
Yield Strength ( N/mm 2 )
Elongation A5 (%)
Impact energy(j) ISO -V 20°C-
>690
>550
>20
>47
Welding Parameters
Diameter (mm)
Length (mm)
Amperage (A)
2.5
300
55– 85
3.25
300
80– 120
4.0
350
110– 150
5.0
350
140– 210
Materials:
Joint welding of non‐alloy, low‐alloy and duplex stainless steels 1.4462 X2CrNiMoN 22 5 3
