RR-C-271 Chains And Attachments, Carbon And Alloy SteelThis specification covers carbon and alloy steel chain of commercial quality together with the attachments most commonly used with this chain.

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RR-C-271F

3.2.1.2 Type II, chain, weldless. Unless otherwise specified (see 6.2), the chain shall be zinc coated or self-colored.

3.2.1.3 Attachments. Unless otherwise specified (see 6.2), attachments shall be self-colored, painted or zinc coated.

3.2.1.4 Zinc coating. When zinc coating is specified, the coating may be applied by the hot-dip (galvanizing) process, by the electrodeposition process, or by the mechanically deposited coating process at the contractor's option. If the hot-dip process is used, the coating shall be applied in accordance with ASTM A153/A153M, class B3; if the electrodeposition process is used, it shall be in accordance with ASTM B633, type II, class Fe/Zn 12; and if the mechanically deposited coating process is used, it shall be in accordance with ASTM B695, type II, class 12. When the electrodeposition process is used, the coating shall be done on screw parts after threading and tapping is completed. When the hot-dip process is used, internal threads may be tapped or retapped after galvanizing. Zinc coating shall be adherent, smooth, and free from injurious defects.

3.2.1.4.1 Embrittlement. When zinc coating of alloy steel is specified, the safeguarding against embrittlement and the procedure for detecting embrittlement shall be in accordance with

ASTM A143/A143M.

3.3 Detail requirements - chain.

3.3.1 Type I, chain, welded steel.

3.3.1.1 Type I, class 1, welded steel alloy chain. The steel alloy chain shall be similar to figure

1 and shall be in accordance with ASTM A391/A391M or ASTM A973/A973M. The figures herein are descriptive, not restrictive, and are not intended to preclude the purchase of chain and attachments otherwise in accordance with this specification.

FIGURE 1. Type I, class 1, 2, 3, and 4 chain.

3.3.1.2 Type I, class 2, welded steel high-test chain. The high test chain shall be similar to figure 1 and shall be in accordance with ASTM A413/A413M, grade 43.

3.3.1.3 Type I, class 3, transport chain. The transport chain shall be similar to figure 1 and shall be in accordance with ASTM A413/A413M, grade 70.

3.3.1.4 Type I, class 4, welded steel proof-coil chain. The proof-coil chain shall be similar to figure 1 and shall be in accordance with ASTM A413/A413M, grade 30.