EN 10277-3 Grade 35SPb20 – Quenched, Tempered & Cold Drawn Steel for Automotive and Machinery Applications
The free cutting case hardening steel 35SPb20 is used for bulk parts of mean strength, especially lower ductility demands in transversal direction compared to other C-steels (e.g. C35). 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 | 9 - 14 % | |
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 | 550 - 900 MPa | |
Yield strength Rp0.2 | 20.0 °C | 385 - 600 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 | 20.0 °C | 420 J/(kg·K) | |
100.0 °C | 490 J/(kg·K) | ||
200.0 °C | 530 J/(kg·K) | ||
400.0 °C | 610 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 | 0.32 - 0.39 % |
Lead | 0.15 - 0.35 % |
Manganese | 0.7 - 1.1 % |
Phosphorus | 0.06 % |
Silicon | 0.4 % |
Sulfur | 0.15 - 0.25 % |
Metal
- EN 10277-3 Grade 46SPb20: Premium Cold‑Drawn, Quenched & Tempered Steel for High‑Strength Applications
- EN 10277-3 Grade 46SPb20 – Quenched, Tempered & Cold Drawn (QT+C) – Premium Free‑Cutting High‑Strength Steel
- EN 10277‑5 Grade 42CrMoS4 Quenched & Tempered Cold Drawn Steel – High‑Performance, Wear‑Resistant for Automotive & Machinery
- EN 10277‑3 Grade 35SPb20 – Cold‑Drawn, Quenched & Tempered Steel for High‑Strength Applications
- EN 10277‑3 Grade 38SMn28: Quenched, Tempered & Cold‑Drawn Steel for High‑Strength Parts
- EN 10277-3 38SMnPb28 Steel – Quenched, Tempered & Cold Drawn for High-Strength Applications
- EN 10277-5 Grade 34CrS4 – Quenched, Tempered & Cold Drawn Steel for Automotive & Machine Applications
- Grade 41CrS4 Steel – EN 10277-5 Quenched, Tempered, and Cold Drawn for Vehicle and Machine Components
- EN 10277-3 Grade 35S20 – High-Strength, Ductile Quenched & Tempered Steel for Automotive & Machinery
- EN 10277-3 Grade 46S20: Quenched, Tempered, Cold Drawn Steel for High-Strength Applications