本SAE推荐实践涵盖了汽车和相关行业中使用的油回火碳钢弹簧丝的机械、化学和尺寸要求。它特别用于制造不经受大量高应力循环的机械弹簧和金属丝模。I类钢丝适用于中等应力，II类钢丝适用于较高应力水平的应用。本文件还涵盖了用这种金属丝制造的弹簧的加工要求。

This SAE Recommended Practice covers the mechanical, chemical, and dimensional requirements of oil-tempered carbon-steel spring wire used in the automotive and related industries. It is especially intended for the manufacture of mechanical springs and wire forms which are not subjected to a large number of high stress cycles. Class I wire is intended for moderate stress and Class II for higher stress level applications. This document also covers the processing requirements for springs fabricated from this wire.