DIN 1651 Grade 35SPb20 cold drawn and quenched and tempered (+C+QT)

DIN 1651 Grade 35SPb20 cold drawn and quenched and tempered (+C+QT) introduction

The fully killed machining steel 35 SPb 20 is used for mass parts of mean strength, especially for lower toughness demands cross-sectional. Its better machinable because of the Pb addition.
Application in the automotive engineering, toolbuilding, apparatus engineering (screws, nuts, smal parts).

Equivalent material: DIN 1.0756, AFNOR 35SPb20, BS 35SPb20, EN 35SPb20, EN 1.0756, ISO 35SPb20

DIN 1651 Grade 35SPb20 cold drawn and quenched and tempered (+C+QT) general

Property Temperature Value
Density 20.0 °C Density of 7.85 g/cm³

DIN 1651 Grade 35SPb20 cold drawn and quenched and tempered (+C+QT) thermal

Property Temperature Value Comment
Coefficient of thermal expansion 100.0 °C Coefficient of thermal expansion of 1.1E-5 1/K -
- 200.0 °C Coefficient of thermal expansion of 1.18E-5 1/K -
- 400.0 °C Coefficient of thermal expansion of 1.32E-5 1/K -
Max service temperature - Max service temperature of 500 °C Typical for Carbon Steel
Melting point - Melting point of 1380 - 1514 °C Typical for Medium Carbon Steel
Specific heat capacity 20.0 °C Specific heat capacity of 420 J/(kg·K) -
- 100.0 °C Specific heat capacity of 490 J/(kg·K) -
- 200.0 °C Specific heat capacity of 530 J/(kg·K) -
- 400.0 °C Specific heat capacity of 610 J/(kg·K) -
Thermal conductivity 20.0 °C Thermal conductivity of 49 W/(m·K) -

DIN 1651 Grade 35SPb20 cold drawn and quenched and tempered (+C+QT) chemical

Property Value
Carbon Carbon of 0.32 - 0.39 %
Lead Lead of 0.15 - 0.35 %
Manganese Manganese of 0.7 - 1.1 %
Phosphorus Phosphorus of 0.06 %
Silicon Silicon of 0.1 - 0.3 %
Sulfur Sulfur of 0.18 - 0.25 %

DIN 1651 Grade 35SPb20 cold drawn and quenched and tempered (+C+QT) electrical

Property Temperature Value
Electrical resistivity 20.0 °C Electrical resistivity of 1.2E-7 Ω·m

DIN 1651 Grade 35SPb20 cold drawn and quenched and tempered (+C+QT) mechanical

Property Temperature Value Comment
Elastic modulus 20.0 °C Elastic modulus of 210 GPa -
- 200.0 °C Elastic modulus of 193 GPa -
- 300.0 °C Elastic modulus of 185 GPa -
- 400.0 °C Elastic modulus of 175 GPa -
Elongation 20.0 °C Elongation of 13 - 17 % -
Poisson's ratio 23.0 °C Poisson's ratio of 0.29 [-] Typical for Medium Carbon Steel
Shear modulus 20.0 °C Shear modulus of 81 GPa -
Tensile strength 20.0 °C Tensile strength of 540 - 760 MPa -
Yield strength 20.0 °C Yield strength of 325 - 420 MPa -

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