JIS SB49M JIS G3103
Boiler and Pressure Vessel Steel Product Introduction
JIS SB49M JIS G3103 steel is a 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 SB49M JIS G3103 steel is available in different grades depending on the application.
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Application: Carbon steel and molybdenum alloy steel sheets for boilers and pressure vessels.
Heat treated: 1844°C - 1852°C.
Boiler and Pressure Vessel Steel Product Details
JIS SB49M JIS G3103 Mechanical properties
Introduction of mechanical properties JIS SB49M JIS G3103:
Yield point(σs)When the stress of JIS SB49M JIS G3103 or specimen exceeds the elastic limit in tension, even if the stress does not increase, the JIS SB49M JIS G3103 or specimen will continue to undergo obvious plastic deformation. This phenomenon is called yielding, and the minimum stress value when yielding occurs is called yield point.
Tensile Strength(σb) : The maximum stress of JIS SB49M JIS G3103 during tension from the beginning to the time of fracture. It indicates the ability of JIS SB49M JIS G3103 to resist fracture.
Elongation(δs) : The percentage of the plastic elongation length to the original sample length is called elongation.
Yield-strength ratio(σs/σb) : The ratio of yield point (yield strength) to tensile strength of JIS SB49M JIS G3103 is called its yield strength ratio. The greater the yield-strength ratio, the higher the reliability of structural parts.
Hardness: Hardness is the ability of JIS SB49M JIS G3103 to resist hard objects pressing into its surface. The higher the hardness, the better the wear resistance.
| 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) |
|---|---|---|---|---|---|---|
| 844 (≥) | 652 (≥) | 32 | 44 | 31 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 111 |
JIS SB49M JIS G3103 Physical properties
Physical properties of JIS SB49M JIS G3103 mainly cover modulus of elasticity, coefficient of thermal expansion, thermal conductivity, specific thermal capacity, electrical resistance value, density, poisson's ratio, 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 |
|---|---|---|---|---|---|---|---|
| 14 | - | - | 0.32 | - | |||
| 576 | 128 | - | 11.3 | 131 | - | ||
| 296 | - | 41 | 43.2 | 233 | 431 |
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