EN 10277-3 Grade 38SMn28 Steel: Cold‑Drawn, Quenched & Tempered for High‑Strength Precision Parts

The free cutting case hardening steel 38SMn28 is used for production of turned parts of higher strength demands. 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	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
Elongation	20.0 °C	15 - 16 %
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	630 - 850 MPa
Yield strength Rp0.2	20.0 °C	380 - 420 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 10277-3 Grade 35SPb20 – Quenched, Tempered & Cold Drawn Steel for Automotive and Machinery Applications EN 10277-3 Grade 38SMn28 Cold Drawn Steel – High Strength, Precision Manufacturing

Metal