JIS G3311 SCM440M Introduce
JIS G3311 SCM440M is one of the most popular steels used in the machining industry due to its superior quality and machinability. It is very heat resistant, and is known for its hardness and tensile strength. It can be machined in a variety of ways, including lathe machining, grinding, cold forming, and EDM. It displays excellent wear resistance and weldability, making it ideal for applications where corrosion might occur. It is an important material for the manufacturing industry, and it is used for a wide range of products.
Smelting temperature:1298°C - 1377°C
Application:Cold rolled special steel plate
JIS G3311 SCM440M Material Chemical Composition
The chemical composition of the JIS G3311 SCM440M steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.3500 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | - | 0.2500 |
| Molybdenum (Mo) | 0.1500 | 0.3000 |
| Manganese (Mn) | 0.6000 | 0.9000 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | 0.9000 | 1.2000 |
| Carbon (C) | 0.3800 | 0.4300 |
JIS G3311 SCM440M Material Mechanical Properties
The mechanical properties of the JIS G3311 SCM440M steel are as follows:
| YieldRp0.2 | ≤ 493 (MPa) |
| TeileRm | ≤ 744 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 23% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 413 |
JIS G3311 SCM440M Material Thermal Properties
The thermal performance parameters of the JIS G3311 SCM440M steel are as follows:
| Temperature (°C) | 13 | 854 | 837 |
| Modulus of elasticity (GPa) | - | 257 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 33 |
| Thermal conductivity (W/m·°C) | - | 32.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 232 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 244 |
| Poisson’s coefficient, ν | - | - | 231 |