ISO 683-4 Grade 38SMnPb28 Untreated: High-Machinability Quenchable Steel for Precision Turned Parts
The free-cutting steel 38SMnPb28, suitable for quenching and tempering, shows enhanced machinability compared to 38SMn28. Application for turned parts of higher strength requirements.
Properties
General
| Property | Temperature | Value | Comment |
|---|---|---|---|
Density | 23.0 °C | 7.8 - 7.9 g/cm³ | Typical for Medium Carbon Steel |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 200 - 215 GPa | Typical for Medium Carbon Steel |
Hardness, Brinell | 20.0 °C | 163 - 228 [-] | |
Poisson's ratio | 23.0 °C | 0.29 [-] | Typical for Medium Carbon Steel |
Shear modulus | 23.0 °C | 75 - 80 GPa | Typical for Carbon Steel |
Tensile strength | 20.0 °C | 530 - 780 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.32E-5 1/K | Typical for Medium Carbon Steel |
Max service temperature | 500 °C | Typical for Carbon Steel | |
Melting point | 1380 - 1514 °C | Typical for Medium Carbon Steel | |
Specific heat capacity | 23.0 °C | 470 - 520 J/(kg·K) | Typical for Medium Carbon Steel |
Thermal conductivity | 23.0 °C | 21 - 52 W/(m·K) | Typical for Medium Carbon Steel |
Electrical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Electrical resistivity | 23.0 °C | 1.43E-7 - 1.74E-7 Ω·m | Typical for Carbon Steel |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.35 - 0.4 % |
Lead | 0.15 - 0.35 % |
Manganese | 1.2 - 1.5 % |
Phosphorus | 0.06 % |
Silicon | 0.4 % |
Sulfur | 0.24 - 0.33 % |
Metal
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- ISO 683-4 Grade 35S20 Untreated Steel – High-Performance Cutting and Quenching Properties
- ISO 683-4 Grade 10SPb20 Untreated: High-Performance Free-Cutting Steel
- ISO 683-4 Grade 11SMnPb30: Untreated, High-Machinability Free-Cutting Steel
- ISO 683-4 Grade 11SMnPb37 – Untreated, High‑Machinability Free‑Cutting Steel
- 15SMn13 Untreated Steel – ISO 683-4 Grade for Precision Turned Parts
- ISO 683-4 Grade 10S20 Untreated Steel – Superior Machinability & Ductility
- ISO 683-4 Grade 11SMn30 – Untreated Free-Cutting Steel
- ISO 683-4 Grade 11SMn37 Untreated – Free‑Cutting Steel Properties & Applications