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45Mn SAE 1046 UNS G10460 Carbon steel
Introduction
Steels containing carbon as the major alloying element are referred as carbon steels. They may also consist of up to 1.2% of manganese and 0.4% of silicon, as well as other alloying elements such as chromium, aluminium, molybdenum, and copper in small quantities.
The following datasheet gives an overview of the AISI 1046 carbon steel.
The chemical composition of the AISI 1046 carbon steel is tabulated below.
| Element | Content (%) |
|---|---|
| Iron, Fe | 98.41 - 98.88 |
| Manganese, Mn | 0.70 - 1.0 |
| Carbon, C | 0.420 - 0.50 |
| Sulfur, S | ≤ 0.050 |
| Phosphorous, P | ≤ 0.040 |
The following table outlines the physical properties of the AISI 1046 carbon steel.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cc | 0.284 lb/in³ |
The mechanical properties of the cold drawn AISI 1046 carbon steel are given in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 650 MPa | 94300 psi |
| Yield strength | 545 MPa | 79000 psi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80.0 GPa | 11600 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) | 12% | 12% |
| Reduction of area | 35% | 35% |
| Hardness, Brinell | 187 | 187 |
| Hardness, Knoop (converted from Brinell hardness) | 209 | 209 |
| Hardness, Rockwell B (converted from Brinell hardness) | 90 | 90 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 10 | 10 |
| Hardness, Vickers (converted from Brinell hardness) | 196 | 196 |
| Machinability (based on AISI 1212 steel. as 100 machinability.) | 55 | 55 |
The following table shows thermal properties of the AISI 1046 carbon steel.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@ 0-100°C/32-212°F) | 11.5 µm/m°C | 6.39 µin/in°F |
| Thermal conductivity | 49.8 W/mK | 346 BTU in/hr.ft².°F |
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