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ASTM A757 Grade A1Q – Quenched & Tempered Medium Carbon Steel

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
Charpy impact energy	23.0 °C	17 J
Elastic modulus	23.0 °C	200 - 215 GPa	Typical for Medium Carbon Steel
Elongation A50	23.0 °C	24 %
Poisson's ratio	23.0 °C	0.29 [-]	Typical for Medium Carbon Steel
Reduction of area	23.0 °C	35 %
Shear modulus	23.0 °C	75 - 80 GPa	Typical for Carbon Steel
Tensile strength	23.0 °C	450 MPa
Yield strength Rp0.2	23.0 °C	240 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	0.3 %
Manganese	1 %
Phosphorus	0.03 %
Silicon	0.6 %
Sulfur	0.025 %

JIS G3321 Grade SGLH490 Steel: Key Properties & Performance DIN 17103 Grade TStE 460 Steel – Cold-Worked, Welded, and Normalized Properties

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