40Cr is a quenched and tempered steel
-High level toughness and hardenability
-Small deformation during quenching, and no obvious temper brittleness after tempering
-Better fatigue limit and high impact resistance after quenching and tempering treatment
-High level toughness and hardenability
-Small deformation during quenching, and no obvious temper brittleness after tempering
-Better fatigue limit and high impact resistance after quenching and tempering treatment
-Suit for all kinds of shaft parts, wheel gear

Key Chemical Composition(%)
| C | Si | Mn | Cr | Ni | P |
| 0.35-0.42 | 0.15-0.35 | 0.60-0.90 | 0.90-1.20 | ≤0.30 | ≤0.035 |

