There are five main grades of chain: 30, 43, 70, 80, and 100. Grade 120 is a newer product available for extremely heavy-duty applications, but it is less common. Each number is the maximum stress that the chain can take per millimeter squared.
What is a grade 43 chain?
Grade 43 chain is a steel chain that possess greater tensile strength than Proof Coil Chain. Grade 43 Chain typically has a 50% higher working load limit than Proof Coil or Grade 30 Chain. G43 chains are also referred to as High Test Chain, Grade 40, Spectrum 4 or System 4.
What is a Grade 8 lifting chain?
Grade 8 chains and fittings are made of alloy steel of the highest quality, exceeding the minimum characteristics prescribed by the standards.
What does G70 chain mean?
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.
What is Grade 70 transport 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.
44 related questions foundWhat is stronger Grade 43 or Grade 70 chain?
Grade 70. Grade 70 chain is about 20 percent stronger than Grade 43. It is made from a heat-treated carbon steel that is incredibly sturdy and durable. Grade 70 industrial chains typically come in a gold chromate finish for easy identification – as well as protection from abrasion and scratches.
Can you use grade 80 chain for transport?
While grade 80 chain is generally approved for overhead lifting, transport assemblies are not rated for overhead lifting due to the hook style. Chain and hooks are embossed with grade 80 markings for easy identification.
How do you determine 80 grade chain?
Grade 80 chain will typically have either an 8 or 80 embossed into one of the links, Grade 70 a 7 or 70, and so on. Always check the chain grade and size and use the appropriate chain for the job. And remember, only grade 80 alloy or higher chain is 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.
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 breaking load of chain?
A chain's WLL is the maximum tension that can be placed on an undamaged or brand new chain. The WLL's rated capacity is shown in pounds. The WLL is computed by dividing the chain's minimum breaking strength by its assigned safety factor rating. The chain's WLL is determined by its diameter and grade.
How much weight can 7mm hold?
Quick Overview: Up to 1.90-tonne capacity.
What is grade 30 chain used for?
General purpose economical chain. Used in a variety of industries and jobs including light construction, agricultural applications, and the marine industry.
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.
What is L4 chain?
Chain Specifications. Designed for use in applications requiring higher strength to weight ratios than Grade 30 chain, Grade 43 High Test chain is used extensively in the trucking industry for binder chains, logging and tow chains. Identified with "L4" or similar grade marking. Self-colored (plain) finish.
What is G7 chain?
Made from high carbon steel, it has twice the working load of BBB chain which allows a smaller chain size to be used. It is marked approximately every foot with the manufacturer's symbol and grade marking: G4, G40, G43 or G400. G70 - Transport. This chain is commonly called G7 or transport chain.
What are the types of chain?
Depending upon the length of the chain, these are divide into following types,
- Metric chains.
- Steel band or Band chain.
- Gunter's chain or surveyor's chain.
- Engineer's chain.
- Revenue chain.
What is the difference between grade 80 and grade 100 chain?
In comparison to Grade 80, Grade 100 chain has a significantly higher strength-to-weight ratio—about 25% higher, depending on the manufacturer. Grade 100 chain also has a slightly harder surface material, which gives it some advantage when it comes to abrasion resistance.
What is the difference between grade 70 and grade 80 chain?
Grade 80, a heat-treated steel chain, differs from Grade 70 in that it's known for its excellent strength to weight ratio; therefore, it can be safely used for overhead lifting. Additionally, it can be used as a towing, safety, and recovery chain.
What is grade 80 chain used for?
With its high strength-to-weight ratio and heat-treated steel, grade 80 chain is safe for overhead lifting and rigging slings. It can also be used for recovery, safety, and towing chains. In recent years, grade 80 chains have become more popular in the flatbed trucking industry.
What is the breaking strength of a grade 70 chain?
Example: Grade 70 chain is rated at 700 Newton per millimeter squared (101,526 Pound-force per square inch) while Grade 80 is rated at 800 Newton per millimeter squared )116,030 Pound-force per square inch). Grade 70 chains, also known as transport chain or trucker's chain, are designed as load securement.
What is the hardest chain to cut?
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.
