AISI 1045 steel is high-quality medium-carbon steel with high strength. It also can be called JIS S45C and DIN C45 steel. It is usually used in normalized condition because of its bad hardenability. It needs to be quenching and tempering treatment to get higher mechanical performance. It is used to manufacture machine parts with high strength requirements. Such as gears, shafts, piston pins, and etc. 1045 Steel round bar sheet plate properties and heat treat as below.
| Country | USA | Germany/UK/France | JAPAN | ISO |
|---|---|---|---|---|
| Standard | ASTM A29/A29M-05 | EN 10083/2-2006 | JIS G4051-2009 | ISO 683/18-1996 |
| Grades | 1045 | C45(1.0503) | S45C | C45E4 |
| STAND | C(%) | Mn(%) | P(%) | S(%) | Si(%) | Cr(%) | Mo(%) | Ni(%) |
|---|---|---|---|---|---|---|---|---|
| ASTM A29/A29M-05 | 0.43-0.50 | 0.60-0.90 | Max 0.040 | Max 0.050 | Max 0.10 | - | - | - |
| EN 10083/2-2006 | 0.42-0.50 | 0.50-0.80 | Max 0.045 | Max 0.045 | Max 0.40 | Max 0.40 | Max 0.10 | Max 0.40 |
| JIS G4051-2009 | 0.42-0.48 | 0.60-0.90 | Max 0.030 | Max 0.035 | 0.15-0.35 | - | - | ≤0.20 |
| ISO 683/18-1996 | 0.42-0.50 | 0.50-0.80 | ≤0.035 | ≤0.035 | 0.10-0.40 | - | - | - |
| Physical Properties | Metric | Imperial |
|---|---|---|
| Density | 7.87 g/cc | 0.284 lb/in³ |
| Hardness, Brinell | 163 | 163 |
| Hardness, Knoop (Converted from Brinell hardness) | 184 |
