ASTM A228 Steel (UNS K08500)

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ASTM A228 Steel (UNS K08500)
Categories:	Metal; Ferrous Metal; ASTM Steel; Carbon Steel; High Carbon Steel
Material Notes:	Cold drawn. High tensile strength and uniform mechanical properties. Music wire springs are not recommended for service temperatures above 121°C (250°F). Applications: High quality springs and wire forms subject to high stresses or requiring good fatigue properties.
Key Words:	spring steel, music wire, AMS 5112, UNS K08500
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Physical Properties	Original Value	Comments

Density	7.80 g/cc	Typical of ASTM Steel

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	41 - 60
Tensile Strength, Yield	1590 - 1760 MPa @Diameter 6.35 mm
	1640 - 1820 MPa @Diameter 5.26 mm
	1690 - 1860 MPa @Diameter 4.50 mm
	1740 - 1920 MPa @Diameter 3.81 mm
	1770 - 1950 MPa @Diameter 3.56 mm
	1800 - 1990 MPa @Diameter 3.18 mm
	1870 - 2070 MPa @Diameter 2.54 mm
	1940 - 2150 MPa @Diameter 2.00 mm
	2020 - 2230 MPa @Diameter 1.60 mm
	2090 - 2310 MPa @Diameter 1.30 mm
	2170 - 2410 MPa @Diameter 1.00 mm
	2250 - 2490 MPa @Diameter 0.810 mm
	2350 - 2600 MPa @Diameter 0.610 mm
	2500 - 2760 MPa @Diameter 0.400 mm
	2600 - 2880 MPa @Diameter 0.300 mm
	2750 - 3040 MPa @Diameter 0.200 mm
	3030 - 3340 MPa @Diameter 0.100 mm
Modulus of Elasticity	210 GPa
Poissons Ratio	0.313	Calculated
Shear Modulus	80.0 GPa

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	120 °C

Component Elements Properties	Original Value	Comments
Carbon, C	0.70 - 1.0 %
Iron, Fe	97.8 - 99 %
Manganese, Mn	0.20 - 0.60 %
Phosphorus, P	<= 0.025 %
Silicon, Si	0.10 - 0.30 %
Sulfur, S	<= 0.030 %

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MSASTMA228 / 14072

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