Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes

SAE 1020 Steel Properties

SAE 1020
Chemical composition: C=0.20%, Mn=0.45%, P=0.04% max, S=0.05% max
Property Value in metric unit Value in US unit
Density 7.872 *10³ kg/m³ 491.4 lb/ft³
Modulus of elasticity 200 GPa 29000 ksi
Thermal expansion (20 ºC) 11.9*10-6 ºCˉ¹ 6.61*10-6 in/(in* ºF)
Specific heat capacity 486 J/(kg*K) 0.116 BTU/(lb*ºF)
Thermal conductivity 51.9 W/(m*K) 360 BTU*in/(hr*ft²*ºF)
Electric resistivity 1.59*10-7 Ohm*m 1.59*10-5 Ohm*cm
Tensile strength (hot rolled) 380 MPa 55100 psi
Yield strength (hot rolled) 165 MPa 29700 psi
Elongation (hot rolled) 25 % 25 %
Hardness (hot rolled) 66 RB 66 RB
Tensile strength (cold drawn) 420 MPa 60900 psi
Yield strength (cold drawn) 205 MPa 50800 psi
Elongation (cold drawn) 15 % 15 %
Hardness (cold drawn) 73 RB 73 RB

Material Notes:
1020 steel responds well to cold work and heat treating. Weldability is fair.
Applications: Shafts, lightly stressed gears, hard wearing surfaces, pins, chains and case hardened parts where core strength is not critical.
1020 is suitable for case hardened parts where core strength is not critical.
Physical Properties Metric English Comments
Density 7.87 g/cc 0.284 lb/in³ 
Mechanical Properties
Hardness, Brinell 121 121 
Hardness, Knoop 140 140  Converted from Brinell hardness.
Hardness, Rockwell B 68 68  Converted from Brinell hardness.
Hardness, Vickers 126 126  Converted from Brinell hardness.
Tensile Strength, Ultimate 420 MPa 60900 psi 
Tensile Strength, Yield 350 MPa 50800 psi 
Elongation at Break 15 % 15 %  In 50 mm
Reduction of Area 40 % 40 % 
Modulus of Elasticity 205 GPa 29700 ksi  Typical for steel
Bulk Modulus 140 GPa 20300 ksi  Typical for steel
Poisson’s Ratio 0.29 0.29 
Machinability 65 % 65 %  Based on AISI 1212 steel. as 100% machinability
Shear Modulus 80 GPa 11600 ksi  Typical for steel
Electrical Properties
Electrical Resistivity 1.59e-005 ohm-cm 1.59e-005 ohm-cm  condition unknown; 0°C (32°F)
Electrical Resistivity at Elevated Temperature 2.19e-005 ohm-cm 2.19e-005 ohm-cm  condition unknown; 100°C (212°F)
Electrical Resistivity at Elevated Temperature 2.92e-005 ohm-cm 2.92e-005 ohm-cm  condition unknown; 200°C (390°F)
Thermal Properties
CTE, linear 20°C 11.7 µm/m-°C 6.5 µin/in-°F  0-100ºC
CTE, linear 250°C 12.8 µm/m-°C 7.11 µin/in-°F  0-300°C (68-570°F)
CTE, linear 500°C 13.9 µm/m-°C 7.72 µin/in-°F  0-500°C (68-930°F)
Specific Heat Capacity 0.486 J/g-°C 0.116 BTU/lb-°F  condition unknown; 50-100°C (122-212°F)
Specific Heat Capacity at Elevated Temperature 0.519 J/g-°C 0.124 BTU/lb-°F  condition unknown; 150-200°C (302-390°F)
Specific Heat Capacity at Elevated Temperature 0.599 J/g-°C 0.143 BTU/lb-°F  condition unknown; 350-400°C (662-752°F)
Thermal Conductivity 51.9 W/m-K 360 BTU-in/hr-ft²-°F  Typical steel

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