JIS G3101 SS400 Steel
SS400 steel is the most commonly used hot-rolled structural steel (formerly known as SS41) in Japan and is called general structural rolled steel in JIS G3101. SS400 material is cheap and versatile and plays an important role in construction, bridges, civil engineering and mechanical equipment structures. Its appearance includes round steel, flat steel, steel sheets, steel strips and profiles.
SS400 Material Meaning
SS400 Steel meaning: SS is the abbreviation for Steel Structure, 400 means the tensile strength is ≥ 400 MPa.
SS41 Meaning: 41 means the tensile strength is 41kgf/mm2 or higher.
Datasheet and specification
The following table shows the specification and data sheet of SS400 material, including chemical composition, mechanical properties, physical properties and equivalents, etc.
Chemical composition
The following table shows the chemical composition of JIS SS400 steel, please note that the carbon (C) content is not specified in JIS G3101, only the phosphorus (P) and sulfur (S) content.
| Chemical composition, % | ||||||
| Country (Region) | Standard | Steel Grade | W | Mn | P, ≤ | S, ≤ |
| Japan | JIS G3101 | SS400 | – | – | 0.05 | 0.05 |
Note: If necessary, alloying elements not listed in this table can be added.
Physical properties
The following table shows the properties of JIS SS400 material, including density and specific gravity, melting point, specific heat capacity, electrical resistivity, modulus of elasticity, thermal conductivity, coefficient of linear expansion, Young's modulus, magnetic permeability, etc. .
Grades:
- 10 -6 ·K -1 = 10 -6 /K
- 1Ω mm²/m = 1 μΩ m
- 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
- 1 GPa = 1kN/mm2
- 1 MPa = 1 N/mm2
| Density and specific gravity, g/cm3 | 7.85 |
| melting point, ℃ | 1494-1527 |
| Specific heat capacity, J/(Kg·K) | 473 to 20 ℃ |
| Electrical resistivity, μΩ·m | About 0.15 (20℃) |
| Far away. modulus of elasticity, GPa | 206 |
| Tr. modulus of elasticity, GPa | 79 |
| Shear modulus, GPa | 79 |
| Thermal conductivity, (W/m·K) | 57-60 |
| Linear expansion coefficient, (10 -6 /K) | 11.3-11.6 (20℃) |
| Young's modulus, GPa | 206 |
| Poisson's ratio | 0.3 |
| Magnetic permeability, mm2/s | 13.9 |
Mechanical properties
The following table shows the mechanical properties of SS400 material, such as yield point or yield strength (yield stress), tensile strength and elongation.
| Standard | Steel | Yield limit (≥, MPa); Steel thickness | |||
