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Oil Tempered Spring Wire is a specially treated spring wire that has been hardened and oil quenched to improve its strength, elasticity, and corrosion resistance. It is heated at high temperatures and then quenched by a process of rapid cooling through immersion in oil to improve its strength and elasticity. Oil-hardened spring wire is widely used in spring applications in automotive manufacturing, machinery and equipment, electronics, furniture, and other fields. Oil Tempered Spring Wire is usually manufactured following international and industry standards such as ASTM A229 and EN 10270-2 to ensure product quality and consistency.