ISO 683-4 Grade 11SMnPb37 – Untreated, High‑Machinability Free‑Cutting Steel

Free-cutting steel 11SMnPb37 is not intended for heat-treatment and is one of the maximum demand free cutting steels due to its excellent machinability properties. Reduced ductility properties and increased cracking risk due to the higher S-content have to be considered. 11SMnPb37 shows compared to 11SMn37 higher parameter. Application for bulk parts in car industry, apparatus and equipment engineering.

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

Hardness, Brinell	20.0 °C	107 - 169 [-]
Poisson's ratio	23.0 °C	0.29 [-]	Typical for Low Carbon Steel
Shear modulus	20.0 °C	81 GPa
Tensile strength	20.0 °C	360 - 570 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		1480 - 1526 °C	Typical for Low Carbon Steel
Specific heat capacity	20.0 °C	460 J/(kg·K)
	100.0 °C	480 J/(kg·K)
	200.0 °C	520 J/(kg·K)
	400.0 °C	610 J/(kg·K)

Thermal conductivity	20.0 °C	54.4 W/(m·K)

Electrical

Property	Temperature	Value
Electrical resistivity	20.0 °C	1.1E-7 Ω·m

Magnetic

Property	Value	Comment
Curie temperature	770 °C	Typical for Low Carbon Steel

Chemical properties

Property	Value
Carbon	0.14 %
Lead	0.2 - 0.35 %
Manganese	1 - 1.5 %
Phosphorus	0.11 %
Silicon	0.05 %
Sulfur	0.34 - 0.4 %

ISO 683-4 Grade 11SMnPb30: Untreated, High-Machinability Free-Cutting Steel 15SMn13 Untreated Steel – ISO 683-4 Grade for Precision Turned Parts

Metal