Welded steel chain is a connected, flexible series of links, made of steel, used especially for holding objects together or restraining or for transmitting mechanical power. Welded steel chain comes in different grades, sizes and materials. The grades of chain are an industry standard set by the National Association of Chain manufactures (NACM).
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What are the most popular grades of Welded Steel Chain?
The most popular grades of Welded Steel Chain are:
Grade 100 Alloy chain for overhead lifting
Grade 80 Alloy chain for overhead lifting
Grade 70 transport chain (not for overhead lifting)
Grade 43 high test chain (not for overhead lifting)
Grade 30 proof coil chain (not for overhead lifting)
What sizes are available for Welded Steel Chain?
The sizes available for Welded Steel Chain are:
Grade 30 sizes are 1/8, 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 5/8, 3/4, 7/8, 1 inch
Grade 43 sizes are 1/4, 5/16, 3/8, 7/16, 1/2, 5/8, 3/4, 7/8 inch
Grade 70 sizes are 1/4, 5/16, 3/8, 7/16, 1/2, 5/8, 3/4 inch
Grade 80 sizes are 7/32, 9/32 5/16, 3/8, 1/2, 5/8, 3/4, 7/8 1, 1-1/4 inch
Grade 100 sizes are 7/32, 9/32 5/16, 3/8, 1/2, 5/8, 3/4, 7/8 inch
How do you identify Welded Steel Chain?
The welded steel chain is identified by an embossed mark on the chain. This mark will include the manufacturer's identification mark or symbol and the grade indictor as shown below for grade 30, 43, and 70.
Grade 30, 43 and 70 chain sizes 5/16 and 3/8 will be embossed at intervals no greater than 1 ft.
All other grade 30,43, and 70 chains will be embossed at intervals no greater than 3 ft.
Grade 30 chain 5/16 or larger is embossed with a 3, 30 or 300.
Grade 43 chain is embossed with a 4, 43 or 430.
Grade 70 chain is embossed with a 7, 70,700.
Grade 80 and 100 chain marking will include the manufacturer's identification mark or symbol, trace ability or date code and the grade indictor as shown below for grade 80 and 100. The embossing will be at intervals no greater than 3 ft.
Grade 80 chains will be embossed with 8, 80 or 800.
Grade 100 chains will be embossed with 10, 100, or 100
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