EN 10263-4 Grade 34CrMo4 quenched and tempered (+QT)
EN 10263-4 Grade 34CrMo4 quenched and tempered (+QT) introduction
The cold-upsettable steel 34 CrMo 4 can be cold-formed with a medium to high rate of forming according to the usual forming methods on single-stage and multi-stage presses. It is used for hexagon screws and hexagon socket head cap screw of strength class 8.8 in the thick dimension range, of strength class 10.9 in the medium and of strength class 12.9 in the thin dimension range
it is used for high-strength parts manufactured according to drawings.
Equivalent material: NBN 34CrMo4, GB ML35CrMo, CSN 15131, AFNOR 38CD4, BS 708M32, GOST 35ChM, ISO C31, UNI 34CrMo4KB, JIS SCM435, PN 35HM, SS 2234, UNE F.1254-35CrMo4DF, ASTM 4137, DIN 1.7220, AFNOR 35CD4, BS 708A37, UNI 35CrMo4, UNE 34CrMo4, AISI 4137, AISI 4135, AISI 4135H, AISI 4137H, SAE 4137, SAE 4135, SAE 4135H, SAE 4137H, JIS SCCRM3, JIS STH22, JIS SCM3H, JIS SCCrM3, JIS SCM435H, JIS SCM435TK, JIS SCM435M, JIS SCM432, JIS SCM430M, EN 34CrMo4, EN 1.7220, GOST 34ChM, GB ML30CrMo, ASTM 4135H, ASTM 4135, ASTM Grade L72, ASTM Grade L7B, UNS G41350, UNS G41370, UNS H41350, UNS H41370
EN 10263-4 Grade 34CrMo4 quenched and tempered (+QT) general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.81 g/cm³ |
EN 10263-4 Grade 34CrMo4 quenched and tempered (+QT) thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
-100.0 °C |
Coefficient of thermal expansion of 1.05E-5 1/K |
- |
| - |
20.0 °C |
Coefficient of thermal expansion of 1.15E-5 1/K |
- |
| - |
100.0 °C |
Coefficient of thermal expansion of 1.21E-5 1/K |
- |
| - |
200.0 °C |
Coefficient of thermal expansion of 1.27E-5 1/K |
- |
| - |
300.0 °C |
Coefficient of thermal expansion of 1.32E-5 1/K |
- |
| - |
400.0 °C |
Coefficient of thermal expansion of 1.36E-5 1/K |
- |
| - |
500.0 °C |
Coefficient of thermal expansion of 1.4E-5 1/K |
- |
| - |
600.0 °C |
Coefficient of thermal expansion of 1.44E-5 1/K |
- |
| Melting point |
- |
Melting point of 1382 - 1529 °C |
Typical for Chromium Molybdenum Steel |
| Specific heat capacity |
-100.0 °C |
Specific heat capacity of 423 J/(kg·K) |
- |
| - |
20.0 °C |
Specific heat capacity of 461 J/(kg·K) |
- |
| - |
100.0 °C |
Specific heat capacity of 479 J/(kg·K) |
- |
| - |
200.0 °C |
Specific heat capacity of 499 J/(kg·K) |
- |
| - |
300.0 °C |
Specific heat capacity of 517 J/(kg·K) |
- |
| - |
400.0 °C |
Specific heat capacity of 536 J/(kg·K) |
- |
| - |
500.0 °C |
Specific heat capacity of 558 J/(kg·K) |
- |
| - |
600.0 °C |
Specific heat capacity of 587 J/(kg·K) |
- |
| Thermal conductivity |
20.0 °C |
Thermal conductivity of 39.6 W/(m·K) |
- |
| - |
100.0 °C |
Thermal conductivity of 41.6 W/(m·K) |
- |
| - |
200.0 °C |
Thermal conductivity of 41.8 W/(m·K) |
- |
| - |
300.0 °C |
Thermal conductivity of 40.3 W/(m·K) |
- |
| - |
400.0 °C |
Thermal conductivity of 38.2 W/(m·K) |
- |
| - |
500.0 °C |
Thermal conductivity of 36 W/(m·K) |
- |
| - |
600.0 °C |
Thermal conductivity of 33.6 W/(m·K) |
- |
| Thermal diffusivity |
20.0 °C |
Thermal diffusivity of 11 mm²/s |
- |
| - |
100.0 °C |
Thermal diffusivity of 10.8 mm²/s |
- |
| - |
200.0 °C |
Thermal diffusivity of 10.1 mm²/s |
- |
| - |
300.0 °C |
Thermal diffusivity of 9.2 mm²/s |
- |
| - |
400.0 °C |
Thermal diffusivity of 8.1 mm²/s |
- |
| - |
500.0 °C |
Thermal diffusivity of 7 mm²/s |
- |
| - |
600.0 °C |
Thermal diffusivity of 5.7 mm²/s |
- |
EN 10263-4 Grade 34CrMo4 quenched and tempered (+QT) chemical
| Property |
Value |
| Carbon |
Carbon of 0.3 - 0.37 % |
| Chromium |
Chromium of 0.9 - 1.2 % |
| Manganese |
Manganese of 0.6 - 0.9 % |
| Molybdenum |
Molybdenum of 0.15 - 0.3 % |
| Phosphorus |
Phosphorus of 0.04 % |
| Silicon |
Silicon of 0.4 % |
| Sulfur |
Sulfur of 0.035 % |
EN 10263-4 Grade 34CrMo4 quenched and tempered (+QT) electrical
| Property |
Temperature |
Value |
| Electrical resistivity |
20.0 °C |
Electrical resistivity of 2.63E-7 Ω·m |
| - |
100.0 °C |
Electrical resistivity of 3.08E-7 Ω·m |
| - |
200.0 °C |
Electrical resistivity of 3.78E-7 Ω·m |
| - |
300.0 °C |
Electrical resistivity of 4.66E-7 Ω·m |
| - |
400.0 °C |
Electrical resistivity of 5.69E-7 Ω·m |
| - |
500.0 °C |
Electrical resistivity of 6.87E-7 Ω·m |
| - |
600.0 °C |
Electrical resistivity of 8.26E-7 Ω·m |
EN 10263-4 Grade 34CrMo4 quenched and tempered (+QT) mechanical
| Property |
Temperature |
Value |
| Elastic modulus |
-100.0 °C |
Elastic modulus of 217 GPa |
| - |
20.0 °C |
Elastic modulus of 210.27 - 212 GPa |
| - |
100.0 °C |
Elastic modulus of 205.17 - 207 GPa |
| - |
200.0 °C |
Elastic modulus of 198.68 - 199 GPa |
| - |
300.0 °C |
Elastic modulus of 191.11 - 192 GPa |
| - |
400.0 °C |
Elastic modulus of 182.31 - 184 GPa |
| - |
500.0 °C |
Elastic modulus of 171.64 - 175 GPa |
| - |
600.0 °C |
Elastic modulus of 164 GPa |
| Elongation |
20.0 °C |
Elongation of 11 - 14 % |
| Poisson's ratio |
20.0 °C |
Poisson's ratio of 0.28 [-] |
| - |
100.0 °C |
Poisson's ratio of 0.29 [-] |
| - |
200.0 °C |
Poisson's ratio of 0.3 [-] |
| - |
300.0 °C |
Poisson's ratio of 0.3 [-] |
| - |
400.0 °C |
Poisson's ratio of 0.3 [-] |
| - |
500.0 °C |
Poisson's ratio of 0.31 [-] |
| Reduction of area |
20.0 °C |
Reduction of area of 45 - 500 % |
| Shear modulus |
20.0 °C |
Shear modulus of 81.88 GPa |
| - |
100.0 °C |
Shear modulus of 79.57 GPa |
| - |
200.0 °C |
Shear modulus of 76.63 GPa |
| - |
300.0 °C |
Shear modulus of 73.54 GPa |
| - |
400.0 °C |
Shear modulus of 69.99 GPa |
| - |
500.0 °C |
Shear modulus of 65.66 GPa |
| Tensile strength |
20.0 °C |
Tensile strength of 800 - 1200 MPa |
| Yield strength |
20.0 °C |
Yield strength of 550 - 800 MPa |
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