

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