| Quantity: | |
|---|---|
CHEMICAL COMPOSITION
C: ≤0.22
Si: ≤0.55
Mn: ≤1.6
P: ≤0.035
S: ≤0.035
Nb: -
V: -
MECHANICAL PROPERTIES
Yield strength (σs):
Thickness ≤ 16mm, ≥355 MPa;
Thickness 16-40mm, ≥345 MPa;
Thickness 40-63mm, ≥335 MPa;
Thickness 250-400mm, ≥265 MPa.
Tensile strength (σb):
Thickness 3mm-100mm, 470-630 MPa;
Thickness 100mm-250mm and 250mm-400mm, 450-600 MPa.
Elongation (δ): 250mm-400mm, ≥17%.
Impact energy: ≥27J (V-notch) at -20°C.
Hardness: 152-179HB
HEAT TREATMENT
S355J2G3N is a low alloy high strength structural steel, and its heat treatment usually includes the following steps:
Normalizing: This is a common heat treatment process, usually performed after forging or rolling, with the purpose of improving the microstructure of the steel and increasing its hardness and toughness. Normalizing is usually performed above the critical temperature of the steel, and then cooled at an appropriate rate to obtain a uniform grain structure.
Annealing: If further hardness reduction or plasticity improvement is required, S355J2G3N may also undergo annealing. Annealing is usually performed at a lower temperature and with a slower cooling rate.
Quenching and Tempering: Although S355J2G3N is mainly improved by normalizing, in some applications, quenching and tempering may also be performed to obtain the desired balance of hardness and toughness.
Controlled Cooling: In some manufacturing processes, controlled cooling rates may be used to obtain specific microstructures and properties.
Heat Treatment of the Heat Affected Zone (HAZ): During welding, the weld HAZ may experience undue thermal cycling, which may require subsequent heat treatment to restore its properties.
FORGING
S355J2G3N steel has good forging characteristics and can be formed by hot forging. After forging, the material is usually normalized to improve its mechanical properties and processing properties.
CHEMICAL COMPOSITION
C: ≤0.22
Si: ≤0.55
Mn: ≤1.6
P: ≤0.035
S: ≤0.035
Nb: -
V: -
MECHANICAL PROPERTIES
Yield strength (σs):
Thickness ≤ 16mm, ≥355 MPa;
Thickness 16-40mm, ≥345 MPa;
Thickness 40-63mm, ≥335 MPa;
Thickness 250-400mm, ≥265 MPa.
Tensile strength (σb):
Thickness 3mm-100mm, 470-630 MPa;
Thickness 100mm-250mm and 250mm-400mm, 450-600 MPa.
Elongation (δ): 250mm-400mm, ≥17%.
Impact energy: ≥27J (V-notch) at -20°C.
Hardness: 152-179HB
HEAT TREATMENT
S355J2G3N is a low alloy high strength structural steel, and its heat treatment usually includes the following steps:
Normalizing: This is a common heat treatment process, usually performed after forging or rolling, with the purpose of improving the microstructure of the steel and increasing its hardness and toughness. Normalizing is usually performed above the critical temperature of the steel, and then cooled at an appropriate rate to obtain a uniform grain structure.
Annealing: If further hardness reduction or plasticity improvement is required, S355J2G3N may also undergo annealing. Annealing is usually performed at a lower temperature and with a slower cooling rate.
Quenching and Tempering: Although S355J2G3N is mainly improved by normalizing, in some applications, quenching and tempering may also be performed to obtain the desired balance of hardness and toughness.
Controlled Cooling: In some manufacturing processes, controlled cooling rates may be used to obtain specific microstructures and properties.
Heat Treatment of the Heat Affected Zone (HAZ): During welding, the weld HAZ may experience undue thermal cycling, which may require subsequent heat treatment to restore its properties.
FORGING
S355J2G3N steel has good forging characteristics and can be formed by hot forging. After forging, the material is usually normalized to improve its mechanical properties and processing properties.
