5140 ML40Cr SCr440 GR8.8 alloy steel round bar1.5140 40cR Scr440 Gr8.8 steel bar Main standard GBJISDINASTM/AISI/SAE40CrSCr4041Cr451402.5140 40cR Scr440 Gr8.8 steel bar chemical compitionCSIMNSPCrNi/Cu0.38-0.430.15-0.350.70-0.900.025 (max)0.025 (max)0.70-0.900.25 (max)3.40Cr 5140 41Cr4 SCr440 steel......
GB | JIS | DIN | ASTM/AISI/SAE |
40Cr | SCr40 | 41Cr4 | 5140 |
C | SI | MN | S | P | Cr | Ni/Cu |
0.38-0.43 | 0.15-0.35 | 0.70-0.90 | 0.025 (max) | 0.025 (max) | 0.70-0.90 | 0.25 (max) |
Hot rolled round bars | 16mm to 350mm |
Cold drawn bars | 6mm to 50mm |
Forged round bars | 200mm-800mm |
Oxygen | Nitrogen | Hydrogen |
20ppm(max) | 90ppm(max) | 2ppm(max) |
A | B | C | D | |
MAX | MAX | MAX | MAX | |
Thin | 2.5 | 2.0 | 0.5 | 0.5 |
Thick | 1.5 | 1.0 | 1.0 | 1.0 |