EN ISO 3581-A
E 25 9 4 N L B 12
Cromarod 2507B is a basic flux coated electrode which deposits a
25%Cr / 9.0%Ni / 4.0%Mo / 0.25%N super dupex type stainless steel weld with a ferrite content of
approximately FN 40. It is designed to give very good fracture toughness at temperatures down to -40
°C. The electrode is intended 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.
Yield strength, Rp0.2%:
Tensile Strength, Rm:
Impact energy, CV:
350 °C, 2h
-40 °C • 55 J
FN 50-55 (WRC -92)
Chemical composition, wt.%
Very good resistance to pitting corrosion and
stress corrosion cracking in chloride and H2S
environments. Good resistance to intergranular
corrosion. Pitting resistance equivalent, PRE = 41.
Critical pitting temperature CPT = 40°C (ASTM
Approx. 850°C in air.