ASTM A878/A878M: Standard Specification for Steel Wire, Modified Chromium Vanadium Valve Spring Quality
SDO: ASTM: ASTM International
DOD Adopted ANSI Approved Approved
This specification covers the highest quality of round modified chromium vanadium alloy steel valve spring wire, uniform in quality and temper, intended for the manufacture of valve springs and other springs requiring high-fatigue properties when used at moderately elevated temperatures. This wire shall be either in the annealed and cold-drawn or oil-tempered condition as specified by purchaser.
The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other.
*A Summary of Changes section appears at the end of this standard.
- valve spring
- modified chromium vanadium
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