What Is Grade 80 Alloy Chain?

Grade 80 alloy chain is a high-strength alloy steel chain designed for overhead lifting and rigging applications. It is commonly used to make chain slings and other lifting assemblies where a rated Working Load Limit (WLL) is required.

The “Grade 80” designation refers to the chain’s strength classification. Unlike standard carbon steel chains used for transport or tie-down, Grade 80 possesses the precise tensile strength and elongation properties required to safely absorb dynamic loading while suspending heavy overhead loads. NOTE:  Only Grade 80 ALLOY CHAINS are rated for lifting.  

Grade 80 vs. Grade 70 vs. Grade 100: Understanding the Differences

Mixing up chain grades on a job site can create catastrophic failure risks or compliance violations. Here is how Grade 80 compares:

1. Grade 80 vs. Grade 70 (Transport Chain)

• Overhead Lifting: Grade 80 is OSHA/ASME certified for overhead lifting. Grade 70 (Transport/Gold Chrome) is STRICTLY PROHIBITED for overhead lifting and is designed solely for tie-downs and cargo securement.

• Safety Factor: G80 uses a 4:1 design factor; G70 uses a 3.5:1 or 3:1 safety factor.

• Ductility: G80 features specialized heat treatment designed to stretch under severe overload before snapping, whereas G70 lacks the ductility testing required for overhead suspension.

2. Grade 80 vs. Grade 100 (Premium Alloy Chain)

• Strength-to-Weight Ratio: Grade 100 chain offers roughly 25% higher Working Load Limit for the same physical chain size compared to Grade 80.

• Weight Efficiency: Rigger teams choose G100 when reducing chain sling weight is critical. However, G80 remains the economical, industry-standard choice for structural manufacturing, foundry work, and heavy rigging applications.

What Does WLL Mean?

WLL stands for Working Load Limit. It is the maximum load a chain or lifting assembly is rated to safely handle under specified conditions.

The WLL depends on factors such as:

• Chain diameter

• Hitch configuration

• Sling angle

• Number of legs

• Hardware used

• Manufacturer specifications

Always use the rated WLL for the complete lifting assembly—not simply the chain's breaking strength.

Grade 80 Working Load Limits (WLL) Quick Reference

Working Load Limits for Grade 80 chain in single-leg straight tension configurations:

Note: Always verify rating tags on assembled slings, as hardware fittings can alter system WLL.

Is Grade 80 Chain Good for Lifting?

Yes. Grade 80 alloy chain is widely used for overhead lifting and chain sling applications when the chain, fittings, and complete assembly are properly rated and used according to the manufacturer's requirements and applicable regulations. 

Popular end fitting are clevis cradle grab hooks, sling hooks, and locking hooks.  For heavy hauling equipment tie-downs foundry hooks are widely used.

The Bottom Line

Grade 80 alloy chain is a high-strength, heat-treated alloy steel chain used for lifting and rigging. It is commonly used to build chain slings and lifting assemblies because of its strength, durability, and rated WLL.

For lifting applications, always verify the chain grade, diameter, WLL, markings, condition, and complete assembly rating before use.

Frequently Asked Questions

Can Grade 80 chain be used for lifting?

Yes. Grade 80 alloy chain is commonly manufactured and rated for overhead lifting applications when used according to applicable requirements.

Is Grade 80 stronger than Grade 70?

Grade 80 lifting chain has a higher strength classification than Grade 70 transport chain. However, the two grades are designed for different applications and should not be treated as interchangeable.

Can Grade 80 chain be used for tie-downs?

Yes - It can physically be used in some applications