JIS G3311 SK4M Introduce
JIS G3311 SK4M is a special grade of steel designed to provide the highest level of thermal properties and strength. It is a product that has been specifically developed to meet the needs of the Japanese steel industry. It is one of the most popular types of steel used in various construction and manufacturing applications. Its high melting and thermal conductivity allow it to be used in applications where heat dissipation is key, and its thermal shock resistance makes it ideal for components that may be exposed to sudden and extreme temperature changes. Furthermore, its superior machinability and excellent welding qualities add to its versatility, making it one of the most preferred materials for a variety of industrial and automotive applications.
Smelting temperature:1527°C - 1413°C
Application:Cold rolled special steel plate
JIS G3311 SK4M Material Chemical Composition
The chemical composition of the JIS G3311 SK4M steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.3500 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | - | 0.2500 |
| Manganese (Mn) | - | 0.5000 |
| Copper (Cu) | - | 0.2500 |
| Chromium (Cr) | - | 0.3000 |
| Carbon (C) | 0.9000 | 1.0000 |
JIS G3311 SK4M Material Mechanical Properties
The mechanical properties of the JIS G3311 SK4M steel are as follows:
| YieldRp0.2 | ≤ 894 (MPa) |
| TeileRm | ≤ 337 (MPa) |
| ImpactKV/Ku | 43(J) |
| ElongationA | 12% |
| Reduction in cross section on fractureZ | 31% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 211 |
JIS G3311 SK4M Material Thermal Properties
The thermal performance parameters of the JIS G3311 SK4M steel are as follows:
| Temperature (°C) | 13 | 314 | 597 |
| Modulus of elasticity (GPa) | - | 959 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 33 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 11.2 |
| Specific thermal capacity (J/kg·°C) | - | 114 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.34 | - | - |
| Deity (kg/dm³) | - | - | 231 |
| Poisson’s coefficient, ν | - | - | 144 |