What does G7 on chain mean?

This chain is commonly called G7 or transport chain. It has a very high strength-to-weight ratio and it has about 25% more strength than high test chains. It works with very few windlasses however. It is hallmarked approximately every foot with the manufacturer's symbol and grade marking: 7, 70, 700.

How strong is 70 grade chain?

Grade 70 has a working load limit available between 3,150 to 15,800 lbs. and is most commonly used for: Trucking and trailer tie downs.

What is the best grade of chain?

Grade 120. An ultra-premium high strength chain designed specifically for the rigorous requirements of overhead lifting applications. The links have a unique square shape and it has approximately 50 percent higher strength compared to Grade 80.

What do chain grades mean?

The grade, indicated by a number, represents the strength—or mean stress value—of the chain. As the chain grade number increases: The material of the chain is typically harder and more resistant to abrasion. Strength-to-weight ratio increases. Working Load Limit (WLL) increases.

Can you cut grade 70 chain with bolt cutters?

This chain is common in the US and can be identified by the term "Grade 70" and the typical gold color. The 5/16" size can BARELY be cut by 36" bolt cutters with a 180lb guy bouncing all his weight on the handle for about 20-30 seconds, including 1 or 2 chain repositions.

What does grade 70 mean on a chain?

Grade 70 chain is transport chain manufactured in heat-treated carbon steel. As the name suggests, it's used as tie-downs on over-the-road trailers so it's also known as truckers chain. It's never to be used for overhead lifting.

What chain is hardest to cut?

The Best Chain Has Hexagonal or Square Links

Hexagonal links (or square or trapezoidal) make it impossible for bolt cutters to get a grip. Chain sold by the foot at the local hardware store performs lifting and towing well, but not theft resistance.

What is Grade 70 transport chain?

Grade 70 chain was specifically designed for the transportation industry. Grade 70 Chain typically has a 20% higher working load limit than High Test Chain or Grade 43 Chain. G70 chains are also referred to as Transport Chain, System 7, or Spectrum 7. Grade 70 Chain is NOT approved for overhead lifting.

How do I know my chain grade?

Just look for the “L” and then the number after it. Each number following the “L” corresponds with a grade of chain. On grade 70 this can also show that the chains are DOT approved! The “L” represents Laclede and our commitment to high quality chain products.

Does grade 70 chain rust?

Grade 70 chain has a gold chromate finish to help resist corrosion from continuous exposure to the elements and the rigors of highway use, such as road salts in the winter.

Can grade 70 chain be used for towing?

Often coated in yellow chromate for an instantly recognizable bright gold appearance, chain grade 70 is the strongest carbon steel chain on the market as far as common chain grades go. It is used most commonly in trucking applications like tying down heavy loads or towing.

Can you weld grade 80 chain?

First, all grade 70, 80 and 100 chain is heat treated. If you heat the steel above 900F or so, you're taking quite a bit of the strength out of the steel in the chain link unless you re-quench and re-temper the steel. Since it would be welded to a larger chunk of steel, that's basically impossible to accomplish.

What is the most secure chain?

We carry Pewag Security Chains that are considered to be the toughest security chains out there. By being the toughest chain, we mean the Pewag chain is the hardest chain to cut with bolt cutters. The biggest reason is the hardened steel chain is squared, so it will not allow bolt cutters to cut through it.

What is the strongest steel chain?

Grade 120.

Grade 120 chain exhibits the strongest tensile strength of all steel alloy chains and is used for exceptionally heavy overhead lifting.

Is there a bike chain that Cannot be cut?

Pragmasis Protector Chain

The Protector chains are available in multiple different sizes. For those of you looking for a “cut-proof bike chain”, the 16mm chain is guaranteed to be, in Pragmasis' words, “uncroppable” and “guaranteed impossible to bolt-crop by hand”.

How strong is G70 chain?

Chain Grading

The G70 designation signifies that a tow chain's tensile strength is rated at 70. A tow chain may be marked with a 7, 70, or even 700 to signify the G70 grade.

Is it hard to cut a Grade 100 chain?

What type of chain cannot be cut with bolt cutters? A higher grade chain (grade 80-100) is difficult to cut with a bolt cutter. For such applications, a circular chain saw must be used. Hence these are best for anti-theft applications.

What size chain Cannot be cut with bolt cutters?

VULCAN Security Chain - Premium Case-Hardened - 3/8 Inch x 6 Foot (+/-2 Inches) - Chain Cannot Be Cut with Bolt Cutters or Hand Tools.

Which is harder to cut chain or cable?

unless you find a chain that was used on a battleship anchor, that cable is gonna be the way to go. We use a relatively thin gauge and it takes much more time to cut it than it does to cut a chain. It frays really bad - so at least the potential thief might be detured knowing that cutting the cable will take some time.

What is 12B chain?

12B roller chain is a 3/4" pitch metric size chain that is manufactured to conform to all BS / DIN / ISO dimensional standards. Special orders for 12B roller chain are available for qualified OEM's & resellers.

What pitch is 10B chain?

This 10B British Standard roller chain is also known as 10B Metric Roller Chain, has a 0.625" pitch, and fully meets all British Standard ISO Standards.

What size is a 50 chain?

# 50 chain is an American standard size that is built to ANSI B29. 1 standards. This size is commonly referred to as 5/8" pitch roller chain, which comes from the pin to pin measurement. 50 chain is one of the most widely used chain sizes out of the 14 available ANSI standard chains.

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