... Steel, Round bars, UT passed.DIN 1.7225/AISI 4140 Steel1)dia 8-650mm,length 1.6-6m 2)Tech:Hot rolled or ... forged 3)Surface:Black or machined 1.Chemical Composition C:0 ... .42, Si:0.30, Mn:0.60, Cr:1.00, Mo:0.20, P≤0.025, S≤0.025 ... .100% UT test and MTC is workable for you ! DIN 1.7225/AISI 4140 die Steel