Oil Tempered Wire
Oil Tempered - ASTM A 229 Spring Wire Properties
High-carbon spring steels are the most commonly used of all springs materials. Try to use these materials in preference to others because they are least expensive, readily available, easily worked, and most popular. These materials are not satisfactory for high or low temperatures or for shock or impact loading.
Nominal Chemical and Physical Oil Tempered:
C 0.55 - 0.85%
Mn 0.60 - 1.20%
Minimum Tensile Strength psi x 103 Class I 165-293, Class II 191-324
Design Stress % Minimum Tensile 45
E - Modulus of Elasticity psi x 106 30
G - Modulus in Torsion psi x 106 11.5
Maximum Operating Temperature 250°F
Rockwell Hardness C42-55
Heat Treating Oil Tempered:
This material is delivered in pre-tempered condition. Therefore, no further hardening can be obtained through heating. However, depending on the application, springs and wire forms will undergo a stress-relieving process.
Oil Tempered is cold drawn and heat treated before fabrication.
Common Trade Names of Oil Tempered:
UNS K07001, G10650
QQ-W-428 Type I