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 PropertiesMetricEnglishComments
Density 7.80 g/cc0.282 lb/in³Typical of ASTM Steel
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell C 41 - 6041 - 60
Poissons Ratio 0.3130.313Calculated
Shear Modulus 80.0 GPa11600 ksi
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 120 °C248 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.70 - 1.0 %0.70 - 1.0 %
Iron, Fe 97.8 - 99 %97.8 - 99 %
Manganese, Mn 0.20 - 0.60 %0.20 - 0.60 %
Phosphorus, P <= 0.025 %<= 0.025 %
Silicon, Si 0.10 - 0.30 %0.10 - 0.30 %
Sulfur, S <= 0.030 %<= 0.030 %

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