STANDARDS INDUSTEEL TRADEMARKS UNS ASTM EURONORMS EN SUS S32550/S32520F F255 1.4507 X2CrNiMoCuN25-6-3 - CHEMICAL ANALYSIS (%WEIGHT) C Cr Ni Mo N Others < 0,030 25 7 3,5 0,23 Cu = 1.5 Specifications Specifications Form Standard Metal Type UNS S32550 Bar ASTM A479 Wire Sheet ASTM A240 Plate ASTM A240 Fitting   Forging   Weld Wire   Weld Electrode E2553 Din 1.4507 Chemistry FERRALIUM 255 is high critical pitting temperature and high critical crevice temperature provide more resistance to pitting and crevice corrosion than lesser alloyed materials. The alloy's very high yield strength combined with good ductility allows lower wall thicknesses in process equipment. Chemical Requirements Ni Cr Mo Mn C Si Fe Max 6.5 27.0 3.9 1.50 0.04 1.00 Bal Min 4.5 24.0 2.9 Mechanical Property Requirements Ultimate Tensile Yield Strength (0.2% OS) Elong. R/A Hardness Brinell Min 110 KSi 80 KSi 15% Max 297 Min 760 MPa 550 MPa Max