General Information

The properties of duplex stainless steels are achieved with overall lower alloy content than similar-performing super-austenitic grades, making their use cost-effective for many applications. Duplex grades are characterized into groups based on their alloy content and corrosion resistance.

Alloy BÖHLER brand WstNo. UNS ISO AMS ASTM Others
Super Duplex A913 1.4410 S32750 X2CrNiMoN25-7-4 F53
Duplex A903 1.4462 S31803, S32205 X2CrNiMoN22-5-3  – F51, STN: 17 381
Super Duplex A911 1.4501 S32760 X2CrNiMoCuWN25-7-4 F55
Ferralium 255 A923 1.4507 S32550 X2CrNiMoCuN25-6-3 F61, F255
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