AISI 4340 Hot Rolled Steel: Key Properties & Specs
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 7.8 g/cm³ |
Dimension
| Property | Value | Comment |
|---|---|---|
Diameter | 20 - 800 mm | |
Length | 2000 - 5800 mm | |
Thickness | 800 mm | max. |
Width | 205 - 800 mm |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 200 - 210 GPa | Typical for Steels |
Elongation | 23.0 °C | 12 % | |
Hardness, Brinell | 23.0 °C | 269 [-] | |
Poisson's ratio | 23.0 °C | 0.29 [-] | Typical for Steels |
Tensile strength | 23.0 °C | 980 MPa | |
Yield strength | 23.0 °C | 835 MPa |
Thermal
| Property | Temperature | Value |
|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.2E-5 1/K |
Specific heat capacity | 23.0 °C | 450 J/(kg·K) |
Thermal conductivity | 23.0 °C | 44.5 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 23.0 °C | 2.48E-7 Ω·m |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.38 - 0.43 % |
Chromium | 0.7 - 0.9 % |
Iron | Balance |
Manganese | 0.6 - 0.8 % |
Molybdenum | 0.2 - 0.3 % |
Nickel | 1.65 - 2 % |
Phosphorus | 0.04 % |
Silicon | 0.15 - 0.35 % |
Sulfur | 0.04 % |
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