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Classification:
AWS A5.4
~E 2209-17
EN ISO 3581-A E 22 9 3 N L R 12
Description:
Cromarod Duplex is a rutile flux coated electrode which deposits a 24%Cr / 10%Ni / 3%Mo / 0.15%N
austenitic-ferritic duplex stainless steel weld metal having a ferrite content of about FN 35. The
electrode is easy to use and produces a smooth weld bead finish and good slag detachability.
Cromarod Duplex is designed for welding similar composition duplex stainless steels which 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
phase balance. Applications include offshore platform pipework, pipelines transporting chloride
bearing products or sour gas and process vessels for chloride environments. Where higher fracture
toughness at -46 °C is required, use Cromarod Duplex B.
Coating type:
Rutile
Welding positions:
Welding current:
DC+, AC OCV > 39V
Redrying temperature:
350 °C, 2h
Chemical composition, wt.%
Mechanical properties
Typical
Yield strength, Rp0.2%: 670 MPa
Tensile Strength, Rm: 840 MPa
Elongation, A5 25%
Impact energy, CV:
-46 °C
•
34 J
Ferrite content:
FN 35 (WRC-92)
Corrosion resistance
Very good resistance to pitting corrosion and
stress corrosion cracking in chloride and H2S
environments. Good resistance to intergranular
corrosion. Pitting resistance equivalent, PRE = 36
Critical pitting temp. CPT = 30 °C (ASTM G48).
Scaling temperature:
Approx. 850 °C in air.
Approvals:
LR
GL
TÜV
DNV
BV
CE
Product data
2,5 300 74522500
60-90 24 0,62 92 1,1
3,2 350 74523200
80-120 25 0,64 45 1,4
4,0 350 74524000
130-170 26 0,64 30 2,0
5,0 450 74525000
160-220 30 0,64 14 2,7