Steel grade: alloy steel 4340, 4140etc; Size: according to drawing; Lead time: ... Steel Grades:Oil & Gas: ST52-3, S355j2g3,A105N, 1045, 4140, 4130, 4145H, 5140, 8620,A182 316(L), A182 F6NM, ... O1, D2, D3, D6, 1045, P20, M2, H11, 1.2311, 1.2314…etc. Power: S45C,EN29A, 20CrMo, 1Cr13, 2Cr13, 24CrMoV, ... Steel / Bearing Steel / Alloy Steel and Stainless Steel. 4140 4340 Forged Hollow Bar first class quality