... Steel AISI 4340/DIN1.6511/40CrNiMo/439 1.Diameter:10-40mm, Length:1200mm-5800mm; ... surface Black Alloy Tool Steel AISI 4340/DIN 1.6511/40CrNiMo/SNCM439It is used for vane, ... shaft,bolt of large dia steamer. 1)Chemical composition: C:0.40, Si0.30, ... , S≤0.025, Cr:0.80, Ni:1.35, Mo:0.202)Annealed Hardness:269, Hardness ... UT test is workable4)Any size as per your requirement. Alloy Steel AISI 4340/DIN ...