ASTM A540 Grade B21 Class 1
Equivalent material: Cr-Mo-V
ASTM A540 Grade B21 Class 1 general
| Property | Temperature | Value | Comment |
|---|---|---|---|
| Density | 23.0 °C | Density of 7.8 - 7.9 g/cm³ | Typical for Chromium Molybdenum Steel |
ASTM A540 Grade B21 Class 1 thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
| Coefficient of thermal expansion | 23.0 °C | Coefficient of thermal expansion of 1.1E-5 - 1.4E-5 1/K | Typical for Chromium Molybdenum Steel |
| Melting point | - | Melting point of 1382 - 1529 °C | Typical for Chromium Molybdenum Steel |
| Specific heat capacity | 23.0 °C | Specific heat capacity of 448 - 502 J/(kg·K) | Typical for Chromium Molybdenum Steel |
| Thermal conductivity | 23.0 °C | Thermal conductivity of 36 - 43 W/(m·K) | Typical for Chromium Molybdenum Steel |
ASTM A540 Grade B21 Class 1 chemical
| Property | Value |
|---|---|
| Carbon | Carbon of 0.36 - 0.44 % |
| Chromium | Chromium of 0.8 - 1.15 % |
| Manganese | Manganese of 0.45 - 0.7 % |
| Molybdenum | Molybdenum of 0.5 - 0.65 % |
| Phosphorus | Phosphorus of 0.03 % |
| Silicon | Silicon of 0.15 - 0.35 % |
| Sulfur | Sulfur of 0.025 % |
| Vanadium | Vanadium of 0.25 - 0.35 % |
ASTM A540 Grade B21 Class 1 mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
| Elastic modulus | 23.0 °C | Elastic modulus of 200 - 215 GPa | Typical for Chromium Molybdenum Steel |
| Elongation A50 | 23.0 °C | Elongation A50 of 10 % | - |
| Hardness, Brinell | 23.0 °C | Hardness, Brinell of 321 - 429 [-] | - |
| Poisson's ratio | 23.0 °C | Poisson's ratio of 0.29 [-] | Typical for Chromium Molybdenum Steel |
| Reduction of area | 23.0 °C | Reduction of area of 35 % | - |
| Tensile strength | 23.0 °C | Tensile strength of 1140 MPa | - |
| Yield strength Rp0.2 | 23.0 °C | Yield strength Rp0.2 of 1035 MPa | - |
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