1050 carbon steel contain carbon as the main alloying element. They are designated by AISI four-digit numbers, and contain 0.4% of silicon and 1.2% of manganese. Molybdenum, chromium, nickel, copper, and aluminium are present in small quantities. Impurities such as sulfur and phosphorous are also found in these steels.
1050 Steel is a Standard grade Carbon Steel. It is composed of (in weight percentage) 0.48-0.55% Carbon (C), 0.60-0.90% Manganese (Mn), 0.04%(max) Phosphorus (P), 0.05%(max) Sulfur (S), and the base metal Iron (Fe). Other designations of AISI 1050 carbon steel include UNS G10500 and AISI 1050.
1050 carbon steel mechanical properties
| Properties | Metric | Imperial |
| Tensile strength | 690 MPa | 100000 psi |
| Yield strength | 580 MPa | 84100 psi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 10% | 10% |
| Reduction of area | 30% | 30% |
| Hardness, Rockwell C | 13 | - |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
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