5 16 Chain Breaking Strength

This number is what we see today g30 g43 g70 g80 g100 and the common chain grades.

5 16 chain breaking strength. Grade 70 tow chain is a high strength carbon steel chain that is ideal for securing cargo recovering vehicles and removing tree stumps. See chart for astm specification number. A newer product in the market grade 120 chain is up to 50 stronger than grade 80 chain and 20 stronger than grade 100 chain. It is safe for overhead lifting.

Then divide that number by 224805 to determine ultimate breaking strength in newtons. All our grade 70 chains are embossed with the proper markings. Heavy duty grade 70 transport chain is made using high strength low alloy carbon steel and coated with a yellow zinc chromate finish for corrosion protection and quick identification as grade 70 tie down chains. Chain is graded based on the ultimate breaking strength of the chain measured in n mm 2 the american society of testing materials astm has published safety standards and regulations for these chain grades.

A newton is approximately 0 224805 lbs. It is unclear why the wll definition is different for grade 40 chain. Grade 70 yellow zinc plated steel tow chain with grab hooks this 5 16 in. Boasting heavy duty welded construction the high quality chain s yellow zinc finish offers lasting weather resistance.

Grade 100 chains are embossed with a 10 or 100. So to determine a chain grade manufacturers must find the ultimate breaking strength. Grade 70 tow chain this 5 16 in. Breaking strength exceeds that of high test g4 chain 30 stronger than standard grade a shackles depending on sizes forged hot dip galvanized coating on both the shackle and pin working load limit size and logo stamped on every shackle bold black colored pin proof tested load rated bow anchor and d chain types.

Where mm is the area of the two cross sections of a single chain link and n is newtons. More strength with lower weight makes g43 high test chain popular for boats with electric windlasses. Boasting heavy duty welded construction the high quality chain s yellow zinc finish offers lasting weather resistance. Chain grades what does g30 g43 g70 g80 g100 and g120 mean.

It includes clevis grab hooks at each end. Lower chain grades g30 and g43. An excellent choice for ground tackle grade 43 chain is about 35 stronger than conventional bbb chain which allows you to save weight without sacrificing anchoring security. One of the safety measures implemented was to place chain in grades based on the ultimate breaking strength of that chain.

The high quality standard link 5 16 size chain is heat treated and strength tested for superior quality. The number after each letter is n mm 2.