AISI 4140
AISI 4140
STANDARDS
AISI 4140 alloy steel is a chromium-, molybdenum-, and manganese-containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength. The following datasheet gives an overview of AISI 4140 alloy steel.
Chemical Properties
| Element | Content |
|---|---|
| Chromium, Cr | 0.80 – 1.10 |
| Manganese, Mn | 0.75 – 1.0 |
| Carbon, C | 0.380 – 0.430 |
Physical Properties
The physical properties of AISI 4140 alloy steel are highlighted in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm3 | 0.284 lb/in³ |
| Manganese, Mn | 1416°C | 2580°F |
Heat Treatment
AISI 4140 alloy steel has good machinability in the annealed condition.