JIS G3101 SS540 Introduce
JIS G3101 is a Japanese steel standard used for industrial and construction applications. This steel is notable for its combination of high strength, excellent weldability and good formability. Production of the steel is done primarily through hot-rolling, cold-rolling and extrusion processes. The steel has a wide variety of chemical and mechanical properties that make it suitable for a wide range of construction applications.
Smelting temperature:1445°C - 1748°C
Application:General structure rolling steel
JIS G3101 SS540 Material Chemical Composition
The chemical composition of the JIS G3101 SS540 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Sulfur (S) | - | 0.0400 |
| PhOsphorus (P) | - | 0.0400 |
| Manganese (Mn) | - | 1.6000 |
| Carbon (C) | - | 0.3000 |
JIS G3101 SS540 Material Mechanical Properties
JIS G3101 SS540 steel, like all steels, has a certain degree of resistance to weathering and corrosion. The degree of protection provided by the steel depends on the environmental conditions it is exposed to and the type of protective coating if any, that is applied to the steel. In areas with high levels of humidity and other environmental factors, regular maintenance is recommended to ensure the structural integrity of the steel.
The mechanical properties of the JIS G3101 SS540 steel are as follows:
| YieldRp0.2 | ≤ 824 (MPa) |
| TeileRm | ≤ 294 (MPa) |
| ImpactKV/Ku | 34(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 33% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 324 |
JIS G3101 SS540 Material Thermal Properties
The thermal performance parameters of the JIS G3101 SS540 steel are as follows:
| Temperature (°C) | 12 | 942 | 639 |
| Modulus of elasticity (GPa) | - | 378 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 41.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 424 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 223 |
| Poisson’s coefficient, ν | - | - | 434 |
JIS G3101 SS540 Material Machining Technology
The cutting speed of the cutting tools should also be kept relatively low when machining JIS G3101 SS540 steel. This helps to reduce the likelihood of chips or burrs forming on the surface of the part while machining and helps to achieve a better surface finish. For drills and end mills, a cutting speed of 50 to 60 m/min will be suitable. For smaller twist drills and taps, a slower speed of 20 to 40 m/min should be used.