EN 10277-3 Grade 46SPb20 Cold Drawn Steel – High Strength, Low Ductility, Pb‑Enhanced Machinability
The free cutting case hardening steel 46SPb20 is used for bulk parts of higher strength, especially for lower ductility demands in transversal direction compared to other C-steels (e.g. C45). Machinability enhancement is achieved by Pb-content. Application in car industry, apparatus, equipment and machine engineering (e.g. screws, nuts, small-size parts). As a bright steel product it is used in the form of bars, bright, straight, in various conditions (see DIN EN 10277 : 1999-10).
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 7.85 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 20.0 °C | 210 GPa | |
200.0 °C | 193 GPa | ||
300.0 °C | 185 GPa | ||
400.0 °C | 175 GPa | ||
Elongation | 20.0 °C | 5 - 8 % | |
Poisson's ratio | 23.0 °C | 0.29 [-] | Typical for Medium Carbon Steel |
Shear modulus | 20.0 °C | 81 GPa | |
Tensile strength | 20.0 °C | 580 - 980 MPa | |
Yield strength Rp0.2 | 20.0 °C | 340 - 570 MPa | |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 100.0 °C | 1.1E-5 1/K | |
200.0 °C | 1.18E-5 1/K | ||
400.0 °C | 1.32E-5 1/K | ||
Max service temperature | 500 °C | Typical for Carbon Steel | |
Melting point | 1380 - 1514 °C | Typical for Medium Carbon Steel | |
Specific heat capacity | 100.0 °C | 490 J/(kg·K) | |
200.0 °C | 530 J/(kg·K) | ||
400.0 °C | 600 J/(kg·K) | ||
Thermal conductivity | 20.0 °C | 49 W/(m·K) | |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 20.0 °C | 1.2E-7 Ω·m |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.42 - 0.5 % |
Lead | 0.15 - 0.35 % |
Manganese | 0.7 - 1.1 % |
Phosphorus | 0.06 % |
Silicon | 0.4 % |
Sulfur | 0.15 - 0.25 % |
Metal
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