EN 10263-4 Grade 19MnB4 annealed to achieve spheroidized carbides and turned
EN 10263-4 Grade 19MnB4 annealed to achieve spheroidized carbides and turned introduction
The cold-upsettable steel 19 MnB 4 can be cold-formed in rolling-hard condition with a low to medium forming rate and in the heat-treated conditions GKZ and K+GKZ+K with a high forming degree. It is used in the un-annealed condition for hexagon screws and hexagon socket head cap screws of the strength class 8.8 in the small and medium dimension range. In the annealed condition it can be used for difficult molded parts.
Equivalent material: ISO E2, UNE F.1292-20MnB4DF, DIN (20MnB4), DIN 1.5523, AFNOR 19MnB4, BS 170H20, UNI 19MnB4, AISI 15B21H, SAE 15B21H, JIS SWRCHB420, JIS SWCHB420, EN 19MnB4, EN 1.5523, GOST 20G2R, GB ML20MnB, ASTM Grade 15B21RH, ASTM 15B21RH, UNS H15211
EN 10263-4 Grade 19MnB4 annealed to achieve spheroidized carbides and turned general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.82 g/cm³ |
EN 10263-4 Grade 19MnB4 annealed to achieve spheroidized carbides and turned thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
-100.0 °C |
Coefficient of thermal expansion of 1.08E-5 1/K |
- |
| - |
20.0 °C |
Coefficient of thermal expansion of 1.19E-5 1/K |
- |
| - |
100.0 °C |
Coefficient of thermal expansion of 1.25E-5 1/K |
- |
| - |
200.0 °C |
Coefficient of thermal expansion of 1.3E-5 1/K |
- |
| - |
300.0 °C |
Coefficient of thermal expansion of 1.36E-5 1/K |
- |
| - |
400.0 °C |
Coefficient of thermal expansion of 1.41E-5 1/K |
- |
| - |
500.0 °C |
Coefficient of thermal expansion of 1.45E-5 1/K |
- |
| - |
600.0 °C |
Coefficient of thermal expansion of 1.49E-5 1/K |
- |
| Max service temperature |
- |
Max service temperature of 500 °C |
Typical for Carbon Steel |
| Melting point |
- |
Melting point of 1480 - 1526 °C |
Typical for Low Carbon 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 W/(m·K) |
- |
| - |
200.0 °C |
Thermal conductivity of 41 W/(m·K) |
- |
| - |
300.0 °C |
Thermal conductivity of 39.9 W/(m·K) |
- |
| - |
400.0 °C |
Thermal conductivity of 38.1 W/(m·K) |
- |
| - |
500.0 °C |
Thermal conductivity of 35.9 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 10.6 mm²/s |
- |
| - |
200.0 °C |
Thermal diffusivity of 9.9 mm²/s |
- |
| - |
300.0 °C |
Thermal diffusivity of 9 mm²/s |
- |
| - |
400.0 °C |
Thermal diffusivity of 8.1 mm²/s |
- |
| - |
500.0 °C |
Thermal diffusivity of 6.9 mm²/s |
- |
| - |
600.0 °C |
Thermal diffusivity of 5.7 mm²/s |
- |
EN 10263-4 Grade 19MnB4 annealed to achieve spheroidized carbides and turned chemical
| Property |
Value |
| Boron |
Boron of 1E-3 - 5E-3 % |
| Carbon |
Carbon of 0.17 - 0.24 % |
| Manganese |
Manganese of 0.8 - 1.15 % |
| Phosphorus |
Phosphorus of 0.04 % |
| Silicon |
Silicon of 0.4 % |
| Sulfur |
Sulfur of 0.035 % |
EN 10263-4 Grade 19MnB4 annealed to achieve spheroidized carbides and turned magnetic
| Property |
Value |
Comment |
| Curie temperature |
Curie temperature of 770 °C |
Typical for Low Carbon Steel |
EN 10263-4 Grade 19MnB4 annealed to achieve spheroidized carbides and turned electrical
| Property |
Temperature |
Value |
| Electrical resistivity |
20.0 °C |
Electrical resistivity of 2.63E-7 Ω·m |
| - |
100.0 °C |
Electrical resistivity of 3.12E-7 Ω·m |
| - |
200.0 °C |
Electrical resistivity of 3.85E-7 Ω·m |
| - |
300.0 °C |
Electrical resistivity of 4.7E-7 Ω·m |
| - |
400.0 °C |
Electrical resistivity of 5.71E-7 Ω·m |
| - |
500.0 °C |
Electrical resistivity of 6.88E-7 Ω·m |
| - |
600.0 °C |
Electrical resistivity of 8.25E-7 Ω·m |
EN 10263-4 Grade 19MnB4 annealed to achieve spheroidized carbides and turned mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
-100.0 °C |
Elastic modulus of 217 GPa |
- |
| - |
20.0 °C |
Elastic modulus of 212 GPa |
- |
| - |
100.0 °C |
Elastic modulus of 207 GPa |
- |
| - |
200.0 °C |
Elastic modulus of 199 GPa |
- |
| - |
300.0 °C |
Elastic modulus of 192 GPa |
- |
| - |
400.0 °C |
Elastic modulus of 184 GPa |
- |
| - |
500.0 °C |
Elastic modulus of 175 GPa |
- |
| - |
600.0 °C |
Elastic modulus of 164 GPa |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.29 [-] |
Typical for Low Carbon Steel |
| Reduction of area |
20.0 °C |
Reduction of area of 62 % |
- |
| Shear modulus |
23.0 °C |
Shear modulus of 82 GPa |
Typical for Low Carbon Steel |
| Tensile strength |
20.0 °C |
Tensile strength of 520 MPa |
- |
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