How does the 'Oil Tempered' state of SAE 1070 wire affect the performance of a heavy-duty spiral ring?

Oil tempering (quenching and tempering) SAE 1070 carbon steel results in a fine-grained martensitic structure that offers an excellent balance of toughness and ductility. For heavy-duty spiral rings, this process ensures that the material can withstand the high strain of installation without cracking. Compared to 'Hard Drawn' wire, oil-tempered wire has more uniform mechanical properties and lower residual stress, which leads to better dimensional stability of the ring over time. This is particularly important for large-diameter rings used in heavy equipment where the axial loads and potential impact forces are high.