Decho is a professional supplier on 40Cr/SAE5140/SCR440 Material Steel Round Bar
The hardenability of steel is good. This kind of steel is suitable for cyanidation and high frequency quenching in addition to quenching and tempering. The cutting performance is better. When the hardness is 174～229HB, the relative machinability is 60%. The steel is suitable for making medium-sized plastic molds.
This steel is one of the most widely used steels in machinery manufacturing. After quenching and tempering, it has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. The hardenability of steel is good. It can be hardened to Ф28～60mm in water quenching and Ф15～40mm in oil quenching. In addition to quenching and tempering, this steel is also suitable for cyanidation and induction hardening. The cutting performance is better. When the hardness is 174～229HB, the relative machinability is 60%. The steel is suitable for making medium-sized plastic molds.
| Steel Grade | Chemical Composition | ||||||||
| C | Si | Mn | Cr | Ni | P | S | Cu | Mo | |
| 40Cr | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | 0.80-1.10 | ≦0.30 | ≦0.035 | ≦0.035 | ≦0.30 | ≦0.10 |
We can cut the length from 10mm min for clients , by this way, clients can save time and cost when processing to other products.
| Category | Sizes | China Grade | American Standard | DIN STANDARD |
| Carbon structure steel | 16mm-250mm | Q235 10# 20# 35# 45# |
A570 GR.33 SAE1010 SAE1020 SAE1035 SAE1045 |
St37-2 C10 CK10 C22 CK22 C35 CK35 C45 CK45 |
| Low alloy high strength structure steel | 16mm-250mm | Q345 | － | ST52 |
| Alloy structure steel | 16mm-250mm | 40Cr 35CrMov 40CrNiMo 42CrMo 20CrMnTiH 27SiMn 20CrMoA 35CrMoA 42CrMoA 40Mn2 45Mn2 15CrmoG 12Cr1MoVA |
AISI5140 AISI4135 AISI4340 AISI4140/4142 |
41Cr4 34CrMo4 36CrNiMo4 41CrMo4/42CrMo4 |
SAE1045 Steel Round Bar 90MM