4140 hot rolled alloy steel bar

 4140 shaft material bright steel round bar  4140 qt steel bar has high hardness and good mechanical properties. We can produce 4140 ht steel rod with difference hardness mechanical properties according to customers different technical requirements. We can supply various 4140 qt steel round bar such as 4140 tg&p steel bar, 4140 peeled & polished steel bar, 4140 cold drawn and QT steel bar etc. 4140 steel specicification: 1. 4140 equivalent steel material: 42CrMo, 42CrMo4, 4140, scm440, 42cd, as 4140 2. 4140 steel chemical composition: C: 0.38-0.48, Si: 0.15-0.35, Mn: 0.75-1.00, S/P: 0.035 max, Cr: 0.90-1.20, Mo: 0.15-0.25 3. 4140 steel grade: astm a193 grade B7, ISO grade 8.8, 10.9, 12.9, astm f1554 grade 105 4. 4140 steel common mechanical properties: Tensile Strength: 860MPa min Yield Strength: 720MPa min Elongation: 16% min Reduction of Area: 52% min Hardness: 35HRC max 5. 4140 steel bar shapes: 4140…