ASTM A387 Grade 21 Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered
Equivalent material: ASTM Grade 21
ASTM A387 Grade 21 Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered general
| Property |
Temperature |
Value |
Comment |
| Density |
20.0 °C |
Density of 7.8 - 7.9 g/cm³ |
Typical for Nickel Chromium Molybdenum Steel |
ASTM A387 Grade 21 Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
20.0 °C |
Coefficient of thermal expansion of 1E-5 - 1.3E-5 1/K |
Typical for Nickel Chromium Molybdenum Steel |
| Melting point |
- |
Melting point of 1382 - 1529 °C |
Typical for Nickel Chromium Molybdenum Steel |
| Thermal conductivity |
20.0 °C |
Thermal conductivity of 34 - 54 W/(m·K) |
Typical for Nickel Chromium Molybdenum Steel |
ASTM A387 Grade 21 Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered chemical
| Property |
Value |
| Carbon |
Carbon of 0.05 - 0.15 % |
| Chromium |
Chromium of 2.75 - 3.25 % |
| Manganese |
Manganese of 0.3 - 0.6 % |
| Molybdenum |
Molybdenum of 0.9 - 1.1 % |
| Phosphorus |
Phosphorus of 0.03 % |
| Silicon |
Silicon of 0.5 % |
| Sulfur |
Sulfur of 0.025 % |
ASTM A387 Grade 21 Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
20.0 °C |
Elastic modulus of 200 - 215 GPa |
Typical for Nickel Chromium Molybdenum Steel |
| Elongation A50 |
20.0 °C |
Elongation A50 of 18 % |
- |
| Poisson's ratio |
20.0 °C |
Poisson's ratio of 0.29 [-] |
Typical for Nickel Chromium Molybdenum Steel |
| Reduction of area |
20.0 °C |
Reduction of area of 45 % |
- |
| Tensile strength |
20.0 °C |
Tensile strength of 415 - 585 MPa |
- |
| Yield strength |
20.0 °C |
Yield strength of 205 MPa |
- |
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