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Classification:
AWS A5.4
E 2209-15
EN ISO 3581-A E 22 9 3 NL B 42
Description:
Cromarod Duplex B is a basic flux coated electrode intended for welding similar composition duplex
stainless steels e.g. 1.4462, UNS 31803. The basic coating design produces a very low micro-oxide
level in the deposit, giving excellent fracture toughness at temperatures down to -46 °C.
Duplex stainless steels offer an excellent combination of high strength and very good resistance to
chloride induced pitting and stress corrosion cracking.
A heat input range of 0,5-2,5 kJ/mm is recommended to maintain a favourable ferrite/austenite phase
balance in the weld metal.
Applications:
Offshore, platform, pipework, pipelines transporting chloride bearing products, or sour gas and
process vessels for chloride environments.
'
Coating type:
Basic
Metal recovery:
110%
Welding positions:
Welding current:
DC+
Redrying temperature:
350 °C, 2h
Chemical composition, wt.%
Mechanical properties
Typical
Yield strength, Rp0.2%: 630 MPa
Tensile Strength, Rm: 790 MPa
Elongation, A5 27%
Impact energy, CV:
-40 °C
•
65 J
-50 °C
•
60 J
Ferrite content:
FN 35 (WRC-92)
Corrosion resistance
Typical value: PRE 36
CPT 30°C (ASTM G48)
Approvals:
CE
Product data
2,5 300 74622500
50-80 24 0,65 87 0,8
3,2 350 74623200
75-120 25 0,68 43 1,4
4,0 350 74624000
120-175 27 0,68 28 1,9