Classification:
AWS A5.4
EN ISO 3581-A
E2594-17
E 25 9 4 N L R 12
Description:
Cromarod 2507R is a rutile flux coated electrode which deposits a 25%Cr/
9.0%Ni / 4.0%Mo / 0.25%N super dupex type stainless steel weld metal with a ferrite content of
approximately FN 57. The electrode is designed for welding similar composition steels e.g. SAF 2507,
Uranus 52N, Zeron 100, which offer even higher strength and corrosion resistance levels than the
ordinary duplex grades. A heat input range of 0.4-1.5 KJ/mm is recommended to maintain a
favourable phase balance in the weld metal and avoid unfavourable precipitation effects in the plate.
Applications include offshore platform pipework for seawater cooling systems and firefighting water,
as well as pumps, valves and risers. Where good fracture toughness at temperatures down to -40 °C
is required, use Cromarod 2507B.
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
700 MPa
900 MPa
22%
20 °C • 35 J
Ferrite content:
FN 50-55 (WRC-92)
Chemical composition, wt.%
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 = 42.
Critical pitting temperature CPT = 40°C (ASTM
G48).
Scaling temperature:
Approx. 850°C in air.
Approvals:
CE
DNV
Product data
2,50
300
74532500
60-90
22
0,50
110
1,1
3,25
350
74533200
80-120
23
0,55
53
1,5
4,00
350
74534000
130-170
24
0,55
35
2,3
81