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A common question our sales team hears from customers about our chain products is 'What are the differences between grade 70, 80, 100, and 120 chain?' We explain the differences between these categories and which chains you should use according to your needs.
Note: to view a complete chain grade comparison chart and WLL chart, see our recent chain grade overview post.
Grade 70 chain is manufactured in heat-treated carbon steel. Also known as "trucker's chain," people use grade 70 as tie-downs on over-the-road trailers. Never use this chain for overhead lifting.
This type generally features a gold chromate finish so it's easy to recognize. It also meets California Highway Patrol and DOT requirements. The uses for this chain, apart from transportation, include towing, logging, oil rigs, and safety applications.
This chain includes designs embossed with 7, 70, or 700.
Grade 80 chain is a heat-treated steel chain with a high strength to weight ratio. Its strength makes it safe for overhead lifting and lifting slings. It's also excellent for uses such as recovery, safety, and towing chains.
This chain is also becoming more common in the flatbed trucking industry to secure heavy-duty industrial loads. Because these types of chains are generally equipped with a specific type of clevis grab hook, chain assemblies are not approved for overhead lifting.
This chain includes designs embossed with 8, 80, or 800.
Grade 100 chain is a newer product and is becoming increasingly popular as a replacement for grade 80 chain. Considered premium quality by manufacturers, it provides about 25% higher working load limits than grade 80 and works for overhead lifting applications.
More people use grade 100 over grade 80 to seure flated loads. This chain contains an added strength and smaller size that does not go against the working load limit.
However, because these chains are generally equipped with a specific type of clevis grab hook, chain assemblies are not approved for overhead lifting.
This chain includes designs embossed with 10, 100, or .
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Grade 120 chain is also a newer category of high performance chain, offering the highest strength in the industry. The square link style creates more contact between the bearing surfaces on the links, which reduces pressure on the chain.
This translates to working load limits that are 50% higher than grade 80, and 20% higher than grade 100. Chain grade 120 works for overhead lifting. It's important to note that as with Grade 80 tie down chain assemblies and Grade 100 tie down chain assemblies, chain assemblies are also not safe for overhead lifting due to the type of hooks used.
This type of chain has a bright blue finish to make them easily recognizable.
Regardless of the type of chain, all must adhere to standards set by the National Association of Chain Manufacturers (NACM), which include:
At Hunter Lift, you can bet on one thing: we know all there is to know about lifting. It's right there in our name. Our lifting devices serve countless needs and industries and use a variety of systems and materials.
Of course chains are a large part of lifting, and we're often asked what the differences are between different grades of chains. Here, we'll look at four chain grades and explore how they differ.
Grade 70, a transport chain, is often known as truckers' chain'for obvious reasons. It is gold-colored but made of heat-treated carbon steel, and as a transport chain, is manufactured to meet DOT requirements. That said, it should never be utilized for overhead lifting; it can, however, be used for logging, towing, oil rigs, and as a safety 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.
Like Grade 80, Grade 100 is known for its excellent strength and its suitability for overhead lifting. Grade 100, however, is even stronger'about 25% more so'and is therefore becoming even more popular than its predecessor (Grade 80), and is quickly replacing it. Of course, as a premium chain grade, it is more expensive.
As one of the newest of the performance chain grades, Grade 120 is the strongest of these four, due to its unique design. As a result, it is 50% stronger than Grade 80 and 25% stronger than Grade 100 and is very well suited for overhead lifting.
Of course there is no rule that says one chain grade is better than another for any situation; the right choice depends on your specific needs and application. If you have any questions about the above chains, or would like to discuss what's best for you, please feel free to contact us anytime.
If you want to learn more, please visit our website Lifting Chain Supply.