Historical
ASTM A227/A227M-99
Standard Specification for Steel Wire, Cold-Drawn for Mechanical Springs
This specification covers two classes of round cold-drawn steel spring wire having properties and quality for the manufacture of mechanical springs that are not subject to high stress or requiring high fatigue properties and wire forms. 1.2 The values stated in either SI (metric) units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other.
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ASTM International [astm]
