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CHEMICAL COMPOSITION
C: ≤0.22
Si: ≤0.55
Mn: ≤1.60
P: ≤0.025
S: ≤0.025
Cu: ≤0.55
MECHANICAL PROPERTIES
Yield Strength: ≥355MPa
Tensile Strength: 450MPa-680MPa
Impact Toughness: ≥27 joules(at a test temperature of -20°C)
Elongation: ≥ 22%
PHYSICAL PROPERTIES
Density: 7.85 g/cm³ (which is equivalent to 0.284 lb/in³)
Melting Point: 1450-1530°C (2640-2800°F)
HEAT TREATMENT
Hot rolling: Hot rolling is a rolling process carried out above the recrystallization temperature of the material, which helps to obtain the desired shape and size while improving the mechanical properties of the material.
Normalizing: Normalizing is a heat treatment method in which steel is heated to a certain temperature and then cooled in air, which can refine the grains, improve the organizational structure, and increase hardness, strength and wear resistance.
Normalizing plus tempering: This combined heat treatment can further improve the toughness and comprehensive mechanical properties of the material.
Controlled rolling: By controlling process parameters such as heating temperature, rolling temperature and deformation system, the purpose of refining the organization, improving strength and toughness can be achieved.
Annealing: Annealing is a heat treatment process that is usually used to reduce hardness, eliminate internal stress, and improve plasticity. It is suitable for improving the processing performance of certain steels.
FORGING
During the forging process, S355J2 can optimize its microstructure and properties by controlling parameters such as heating temperature, deformation rate and cooling rate. For example, through appropriate heat treatment, such as normalizing or annealing, the plasticity of the steel can be improved, and the deformation resistance during the forging process can be reduced, thereby improving the forging performance of the material.
It is worth noting that the forging performance of S355J2 is also affected by its thickness and size. In some cases, it may be necessary to preheat the material or use specific forging techniques to ensure uniform deformation and avoid cracks or other defects.
CHEMICAL COMPOSITION
C: ≤0.22
Si: ≤0.55
Mn: ≤1.60
P: ≤0.025
S: ≤0.025
Cu: ≤0.55
MECHANICAL PROPERTIES
Yield Strength: ≥355MPa
Tensile Strength: 450MPa-680MPa
Impact Toughness: ≥27 joules(at a test temperature of -20°C)
Elongation: ≥ 22%
PHYSICAL PROPERTIES
Density: 7.85 g/cm³ (which is equivalent to 0.284 lb/in³)
Melting Point: 1450-1530°C (2640-2800°F)
HEAT TREATMENT
Hot rolling: Hot rolling is a rolling process carried out above the recrystallization temperature of the material, which helps to obtain the desired shape and size while improving the mechanical properties of the material.
Normalizing: Normalizing is a heat treatment method in which steel is heated to a certain temperature and then cooled in air, which can refine the grains, improve the organizational structure, and increase hardness, strength and wear resistance.
Normalizing plus tempering: This combined heat treatment can further improve the toughness and comprehensive mechanical properties of the material.
Controlled rolling: By controlling process parameters such as heating temperature, rolling temperature and deformation system, the purpose of refining the organization, improving strength and toughness can be achieved.
Annealing: Annealing is a heat treatment process that is usually used to reduce hardness, eliminate internal stress, and improve plasticity. It is suitable for improving the processing performance of certain steels.
FORGING
During the forging process, S355J2 can optimize its microstructure and properties by controlling parameters such as heating temperature, deformation rate and cooling rate. For example, through appropriate heat treatment, such as normalizing or annealing, the plasticity of the steel can be improved, and the deformation resistance during the forging process can be reduced, thereby improving the forging performance of the material.
It is worth noting that the forging performance of S355J2 is also affected by its thickness and size. In some cases, it may be necessary to preheat the material or use specific forging techniques to ensure uniform deformation and avoid cracks or other defects.
