EN ISO 3581-A
E 25 9 4 N L R 12
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.
Yield strength, Rp0.2%:
Tensile Strength, Rm:
Impact energy, CV:
DC+, AC OCV > 39V
350 °C, 2h
20 °C • 35 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 = 42.
Critical pitting temperature CPT = 40°C (ASTM
Approx. 850°C in air.