DIN 17212 Grade 38Cr4 quenched and tempered (+QT)
DIN 17212 Grade 38Cr4 quenched and tempered (+QT) introduction
The in the quenched and tempered condition flame and induction hardenable alloyed special steel has a, compared to the common quenched and tempered steel, constricted range of the C content and a lower maximum value of the P content.
The steel is suitable for flash welding, if prooved conditions will be kept.
For better machining the steel can be soft annealed. In this soft annealed and also in the normalised condition the material is unrestrained cold shearable.
A maximum value for nonmetallic inclusions by arrangement.
Delivery forms:
- semi-finished product, rolled or forged
- steel bars, hot-rolled or hot forged
- wire, hot-rolled
- sheet, strip and wide flats, hot-rolled
- tubes, coils, seamless
- open die and drop forgings
Application:
car industry, engine construction, mechanical engineering
Equivalent material: ISO 7, DIN 1.7043, EN 38Cr4, EN 1.7043
DIN 17212 Grade 38Cr4 quenched and tempered (+QT) general
| Property |
Temperature |
Value |
Comment |
| Density |
23.0 °C |
Density of 7.8 - 7.9 g/cm³ |
Typical for Chromium Steel |
DIN 17212 Grade 38Cr4 quenched and tempered (+QT) thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
23.0 °C |
Coefficient of thermal expansion of 9.4E-6 - 1.5E-5 1/K |
Typical for Chromium Steel |
| Melting point |
- |
Melting point of 1382 - 1529 °C |
Typical for Chromium Steel |
| Specific heat capacity |
23.0 °C |
Specific heat capacity of 440 - 494 J/(kg·K) |
Typical for Chromium Steel |
| Thermal conductivity |
23.0 °C |
Thermal conductivity of 23 - 50 W/(m·K) |
Typical for Chromium Steel |
DIN 17212 Grade 38Cr4 quenched and tempered (+QT) chemical
| Property |
Value |
| Carbon |
Carbon of 0.34 - 0.4 % |
| Chromium |
Chromium of 0.9 - 1.2 % |
| Manganese |
Manganese of 0.6 - 0.9 % |
| Phosphorus |
Phosphorus of 0.03 % |
| Silicon |
Silicon of 0.15 - 0.4 % |
| Sulfur |
Sulfur of 0.035 % |
DIN 17212 Grade 38Cr4 quenched and tempered (+QT) mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
23.0 °C |
Elastic modulus of 200 - 215 GPa |
Typical for Chromium Steel |
| Elongation |
20.0 °C |
Elongation of 11 - 14 % |
- |
| Hardness, Rockwell F |
20.0 °C |
Hardness, Rockwell F of 53 [-] |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.29 [-] |
Typical for Chromium Steel |
| Reduction of area |
20.0 °C |
Reduction of area of 40 - 50 % |
- |
| Tensile strength |
20.0 °C |
Tensile strength of 740 - 1130 MPa |
- |
| Yield strength |
20.0 °C |
Yield strength of 510 - 740 MPa |
- |
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