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CHEMICAL COMPOSITION
C: 0.18-0.23%
Mn: 0.30-0.60%
S: ≤0.05%
P: ≤0.04%
MECHANICAL PROPERTIES
Tensile strength (ultimate): 390 - 460 MPa.
Tensile strength (yield): 240 - 380 MPa.
Young's modulus (E): 200 GPa.
Bulk modulus (K): 140 GPa.
Shear modulus (G): 80 GPa.
Elongation after fracture: 15 - 30%.
Poisson's ratio (ν): 0.29.
Brinell hardness: 110 - 130.
PHYSICAL PROPERTIES
Density: 7870 kg/m³ (or 7.87 g/cm³).
Melting point: 1515°C (2760°F).
Thermal properties:
Thermal conductivity: 52 W/m·K.
Specific heat: 486 J/kg·K.
Coefficient of thermal expansion: 1.17×10^-5^ 1/°C.
Electrical properties:
Electrical conductivity: 6.38×10^6^ S/m.
Resistivity: 1.59×10^-7^ Ω·m
HEAT TREATMENT
Annealing: SAE1020 can be annealed to increase its hardness and strength.
Normalizing: Normalizing is the process of heating the steel to a certain temperature, usually around 910°C, and then air cooling. This helps to improve the plasticity and toughness of the material.
Quenching: SAE1020 can be quenched to increase its hardness and wear resistance.
Tempering: Tempering is a heat treatment process performed after quenching, which can improve the toughness and impact properties of the material. By controlling the tempering temperature, the hardness and toughness of the material can be adjusted.
Heat treatment hardness: The factory heat treatment hardness of SAE1020 usually does not exceed 1155HBW.
Heat treatment temperature: When heat treating, the heating temperature of SAE1020 may range from 760-790°C (quenching) to 855-900°C (annealing).
FORGING
Forging performance: Due to the low carbon content of SAE1020, it exhibits good ductility and plasticity during forging and is easy to process into various shapes.
Forging temperature: The forging temperature of SAE1020 is usually between 1100°C and 900°C. This temperature range helps to maintain the plasticity of the material and reduce the risk of deformation and cracks during processing.
Heat treatment after forging: SAE1020 may need heat treatment such as normalizing or annealing after forging to improve its mechanical properties and microstructure. These heat treatment processes help reduce forging stress and improve the uniformity and toughness of the material.
Forging precautions: During the forging process, it is necessary to pay attention to controlling the forging speed and temperature to prevent the material from overheating or cooling too quickly, which may cause material performance degradation or defects.
CHEMICAL COMPOSITION
C: 0.18-0.23%
Mn: 0.30-0.60%
S: ≤0.05%
P: ≤0.04%
MECHANICAL PROPERTIES
Tensile strength (ultimate): 390 - 460 MPa.
Tensile strength (yield): 240 - 380 MPa.
Young's modulus (E): 200 GPa.
Bulk modulus (K): 140 GPa.
Shear modulus (G): 80 GPa.
Elongation after fracture: 15 - 30%.
Poisson's ratio (ν): 0.29.
Brinell hardness: 110 - 130.
PHYSICAL PROPERTIES
Density: 7870 kg/m³ (or 7.87 g/cm³).
Melting point: 1515°C (2760°F).
Thermal properties:
Thermal conductivity: 52 W/m·K.
Specific heat: 486 J/kg·K.
Coefficient of thermal expansion: 1.17×10^-5^ 1/°C.
Electrical properties:
Electrical conductivity: 6.38×10^6^ S/m.
Resistivity: 1.59×10^-7^ Ω·m
HEAT TREATMENT
Annealing: SAE1020 can be annealed to increase its hardness and strength.
Normalizing: Normalizing is the process of heating the steel to a certain temperature, usually around 910°C, and then air cooling. This helps to improve the plasticity and toughness of the material.
Quenching: SAE1020 can be quenched to increase its hardness and wear resistance.
Tempering: Tempering is a heat treatment process performed after quenching, which can improve the toughness and impact properties of the material. By controlling the tempering temperature, the hardness and toughness of the material can be adjusted.
Heat treatment hardness: The factory heat treatment hardness of SAE1020 usually does not exceed 1155HBW.
Heat treatment temperature: When heat treating, the heating temperature of SAE1020 may range from 760-790°C (quenching) to 855-900°C (annealing).
FORGING
Forging performance: Due to the low carbon content of SAE1020, it exhibits good ductility and plasticity during forging and is easy to process into various shapes.
Forging temperature: The forging temperature of SAE1020 is usually between 1100°C and 900°C. This temperature range helps to maintain the plasticity of the material and reduce the risk of deformation and cracks during processing.
Heat treatment after forging: SAE1020 may need heat treatment such as normalizing or annealing after forging to improve its mechanical properties and microstructure. These heat treatment processes help reduce forging stress and improve the uniformity and toughness of the material.
Forging precautions: During the forging process, it is necessary to pay attention to controlling the forging speed and temperature to prevent the material from overheating or cooling too quickly, which may cause material performance degradation or defects.
