Grade 80 chain is approved for overhead lifting.
Grade 80 chain strength.
You could reverse this formula to determine ultimate breaking strength if all you know if the chain grade.
Peerless grade 80 chain meets the latest guidelines of the national association of chain manufacturers nacm and astm a391 a391m.
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Grade 80 chain is a heat treated alloy steel designed for high strength for overhead lifting and tie down applications.
Any lower grade chain should not be used.
A newer product in the market grade 120 chain is up to 50 stronger than grade.
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Determining chain working load limits.
Grade 80 chain is a premium quality high strength alloy steel.
Quenched and tempered before proof testing grade 80 chain specs have tensile strength twice of ordinary steel chain.
To ensure that alloy chain consistently meets this requirement astm requires the use of certain alloying elements in the manufacturing of the steel for alloy steel chain.
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That number is the chain grade.
Grade 80 chain is embossed using an 8 80 or 800.
It is quenched and tempered before proof testing and the ultimate tensile strength is over twice that of ordinary steel chain.
Currently alloy chain of grade 80 or grade 100 should be used for overhead lifting.
It is the most economical of the three chain grade types that are suitable for overhead lifting grade 80 grade 100 grade 120.
This means you can use a smaller and lighter chain to get the job done without sacrificing working load limits.
Newer and stronger still is grade 120 chain.
Considered premium quality chain it offers about a 25 higher work load limit over grade 80 chain.
Grade 120 tie downs offer the highest strength available in the industry with 20 more strength than comparable grade 100 chain and up to 50 more strength than grade 80 chain.
B a products g8 1420tl grab hook with twist lock each end 1 4 grade 80 chain x 20 4 height 6 75 width 17 length.
It is safe for overhead lifting.
Chain grades for overhead lifting g80 g100 or g120.
G80 alloy chain is rugged versatile high strength low weight chain.
So grade 80 is really 800 and grade 120 is 1 200.
The astm states that alloy chain shall be able to elongate a minimum of 20 before fracture.
Grade 80 chains are also referred to as grade 8 system 8 spectrum 8.
Alloy chain grade 80 or grade 100 should be used for overhead lifting.
Chain grades advertised by manufacturers are one tenth of the actual mathematical grades.
Grade 80 chain was specifically designed to for the rigorous requirements of overhead lifting applications.
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Grade 100 chains are embossed with a 10 or 100.
