EN 10277-3 Grade 46SPb20: Premium Cold‑Drawn, Quenched & Tempered Steel for High‑Strength Applications

The free cutting case hardening steel 46SPb20 is used for bulk parts of higher strength, especially for lower ductility demands in transversal direction compared to other C-steels (e.g. C45). 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	13 - 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	630 - 800 MPa
Yield strength Rp0.2	20.0 °C	370 - 430 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	100.0 °C	490 J/(kg·K)
	200.0 °C	530 J/(kg·K)
	400.0 °C	600 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	0.42 - 0.5 %
Lead	0.15 - 0.35 %
Manganese	0.7 - 1.1 %
Phosphorus	0.06 %
Silicon	0.4 %
Sulfur	0.15 - 0.25 %

EN 1652 CuZn20 H085: High‑Strength, Unhardenable Copper Alloy for Jewelry, Automotive, and Industrial Use EN 10277-3 Grade 46SPb20 Cold Drawn Steel – High Strength, Low Ductility, Pb‑Enhanced Machinability

Metal