Classification:
AWS A5.4
EN ISO 3581-A
~E 385-17
E 20 25 5 Cu N L R 12
Description:
Cromarod 385 is a rutile flux coated electrode designed for welding the fully austenitic stainless steels
of the 20%Cr / 25%Ni / 4.5%Mo / Cu type, used for their very high resistance to corrosion in severe,
non-oxidising environments e.g. sulphuric acid. The low carbon, high alloy content of Cromarod 385
weld metal gives excellent resistance to intergranular corrosion and stress corrosion cracking,
combined with superior resistance to crevice and pitting corrosion. Use no preheat, avoid high
heat-input and maintain an interpass temperature of maximum 150 °C.
For very severe corrosion environments a special variant of this electrode, with a Mo content of 6%, is
available to order.
Coating type:
Rutile
Mechanical properties
Welding positions:
Yield strength, Rp0.2%:
Tensile Strength, Rm:
Elongation, A5
Impact energy, CV:
Typical
Welding current:
DC+, AC OCV > 39V
Redrying temperature:
350 °C, 2h
380 MPa
580 MPa
35%
20 °C • 55 J
Ferrite content:
FN 0 (WRC-92)
Chemical composition, wt.%
Corrosion resistance
Very good resistance to general and intergranular
corrosion in non-oxidising acid environments e.g.
sulphuric (up to 90%), phosphoric and organic
acids. Good resistance to stress corrosion in
chloride bearing environments.
Scaling temperature:
Approx. 1000 °C in air.
Approvals:
CE
Product data
2,5
300
74502500
40-80
24
0,53
101
1,1
3,2
350
74503200
80-120
25
0,58
50
1,5
4,0
350
74504000
130-170
26
0,58
33
2,3
84