1.professional 2.High quality 3.Competitive price 4.Prompt reply working steel 3Cr13 Standard: AISI, ASTM, BS, DIN, GB, JIS ... cooling backfire: 600-750°c quick coolingBlack forged bar stainless steel round / hex bar stock with diameter size 90-200mmDia ... 321, 316, 316L, 310S, 430 etcShapeRound , Hex square, angle, flat, SquareSurfaceBlack, Pickling, Polish, peeled etc ., LengthAccording to client's ...