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ISO 683-4 Grade 38SMn28 Untreated Steel – Ideal for High‑Strength Turned Parts

The free-cutting steel 38SMn28, suitable for quenching and tempering, is applicated for production of turned parts of high 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 %
Manganese	1.2 - 1.5 %
Phosphorus	0.06 %
Silicon	0.4 %
Sulfur	0.24 - 0.33 %

EN 12164 Grade CuZn40Pb2 R550 – Unhardenable Wrought Alloy with Enhanced Machinability ISO 683-4 Grade 38SMnPb28 Untreated: High-Machinability Quenchable Steel for Precision Turned Parts

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