Oil Tempered Springs
Oil-tempered spring steels are good-quality, high-carbon spring steels, uniform in quality and temper, and used for a large majority of coil springs requiring wire diameters from 1/8 to ½ in. (3.0 to 13mm), although other diameters are also available. Their color is usually a dull, smoky, black, mottled, with gray, lacking all the gloss and shine common to music wire. These materials are used only for cold-coiled springs.
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| Technical Specification | Oil Tempered |
|---|---|
| Nominal Composition |
C: 0.55 - 0.85 Mn: 0.30 – 1.2 Fe: 98.29 |
| Density |
0.284 lb./in3 |
| Modulus of Elasticity (E) |
29 x 103 ksi |
| Modulus of Rigidity (G) |
11.6 x 103 ksi |
| Electrical Resistivity |
170 µΩ.cm |
| Thermal Conductivity |
361 Btu/(hr/ft2/in/°F) |
| Min Size |
0.020 in (0.500 mm) |
| Max Temp |
150oC (300oF) |
| Uses |
It can be used for applications that are exposed to constant loads such as garage door springs |
