1.1 This specification covers carbon steel chain for such applications as railroad cars, construction, industrial uses, load binding, and general purposes other than overhead lifting.
Note 18212;This specification does not cover carbon steel chain for sprocket applications.
1.2 Three classes of carbon steel chain are covered:
1.2.1 Grade 308212;Proof coil chain.
1.2.2 Grade 438212;High test chain.
1.2.3 Grade 708212;Transport chain.
1.3 The Grade designation is 1/10 of the minimum breaking strength in newtons divided by two times the nominal cross-sectional area of the chain in square millimetres.
1.4 The values stated in either acceptable metric units or in other units shall be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.
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