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SAE 1050 UNS G10550 GB/T 55# JIS S55C EN C50 W.Nr 1.0535 C55E4 Carbon Steel
Chemical Composition
The chemical composition of AISI 1055 carbon steel is outlined in the following table.
Element | Content (%) |
Iron, Fe | 98.41-98.9 |
Manganese, Mn | 0.60-0.90 |
Carbon, C | 0.50-0.60 |
Sulfur, S | ≤ 0.050 |
Phosphorous, P | ≤ 0.040 |
Physical Properties
The physical properties of AISI 1055 carbon steel are tabulated below.
Properties | Metric | Imperial |
Density | 7.85 g/cm3 | 0.284 lb/in3 |
Mechanical Properties
The following table shows mechanical properties of the cold drawn AISI 1055 carbon steel.
Properties | Metric | Imperial |
Tensile strength, ultimate | 660 MPa | 95700 psi |
Tensile strength, yield | 560 MPa | 81200 psi |
Modulus of elasticity | 190-210 GPa | 29700-30458 ksi |
Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
Poissons ratio | 0.27-0.30 | 0.27-0.30 |
Elongation at break (in 50 mm) | 10% | 10% |
Reduction of area | 40% | 40% |
Hardness, Brinell | 197 | 197 |
Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 13 | 13 |
Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
Machinability (based on AISI 1212 steel. as 100 machinability) | 55 | 55 |
Thermal Properties
The thermal properties of AISI 1055 carbon steel are given in the following table.
Properties | Metric | Imperial |
Thermal expansion co-efficient | 11 µm/m°C | 6.11 µin/in°F |
Thermal conductivity | 49.8 W/mK | 346 BTU in/hr.ft2.°F |
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