JIS SB 480 JIS G3103
Boiler and Pressure Vessel Steel Product Introduction
JIS SB 480 JIS G3103 is a Japanese industrial standard developed by the Japanese Industrial Standards Committee (JISC). It is a grade of carbon steel used in the manufacture of boilers, pressure vessels, and heat exchangers. The steel is composed of iron, carbon, and small amounts of manganese, phosphorus, sulfur, and silicon. JIS SB 480 JIS G3103 steel is available in different grades depending on the application. It is commonly used in the production of hot rolled carbon steel plate, pressure vessel plates, and boiler plates. It is heat treated to increase its toughness and strength, and is suitable for high-temperature and pressure applications.
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Application: Carbon steel and molybdenum alloy steel sheets for boilers and pressure vessels.
Heat treated: 1212°C - 1154°C.
Boiler and Pressure Vessel Steel Product Details
JIS SB 480 JIS G3103 Mechanical properties
The yield refers to the transition of JIS SB 480 JIS G3103 from non-uniform elastic state to elastic-plastic state after reaching a certain deformation stress. It marks the beginning of macro-plastic deformation.
Tensile strength(Rm) refers to the maximum stress that JIS SB 480 JIS G3103 bears before breaking. When the steel yields to a certain extent, its resistance to deformation increases again due to the rearrangement of internal grains. At this time, although the deformation develops rapidly, it can only increase with the increase of stress until the maximum stress is reached. Thereafter, the JIS SB 480 JIS G3103 is ability to resist deformation is obviously reduced, and a large plastic deformation occurs at the weakest point, where the section of the specimen shrinks rapidly, leading to necking until fracture. The maximum stress value of JIS SB 480 JIS G3103 before tensile fracture is called strength limit or tensile strength.
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 281 (≥) | 454 (≥) | 22 | 23 | 14 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 442 |
JIS SB 480 JIS G3103 Physical properties
Physical performance parameters of JIS SB 480 JIS G3103 are mainly indicated by density, poisson's ratio, thermal conductivity, specific thermal capacity, coefficient of thermal expansion, modulus of elasticity, electrical resistance value, etc.
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson's coefficient, ν |
|---|---|---|---|---|---|---|---|
| 11 | - | - | 0.32 | - | |||
| 954 | 292 | - | 21.3 | 312 | - | ||
| 667 | - | 14 | 32.2 | 423 | 123 |
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