In the world of lifting and rigging, chain quality and strength are paramount. Grade 80 and Grade 100 chains are among the most widely used, but it’s important to understand their differences to choose the right chain for a specific application.
Manufacturing and Material
Grade 80 chains are typically made from heat-treated alloy steel. They are known for their high strength and good wear resistance, making them suitable for a variety of lifting applications.
Grade 100 chains, on the other hand, are also made from alloy steel but are further refined and treated to achieve higher strength. This allows for lifting heavier loads with a similar chain size compared to Grade 80.
Strength and Load Capacity
The primary difference between Grade 80 and Grade 100 chains lies in their strength. Grade 100 chains are approximately 25% stronger than Grade 80 chains. This increased strength means that a Grade 100 chain can lift heavier loads than a Grade 80 chain of the same size.
Working Load Limit (WLL)
Working Load Limit (WLL) is the maximum load that should be applied to the chain. Grade 100 chains have a higher WLL compared to Grade 80 chains, which means they can safely handle heavier loads.
Flexibility and Fatigue Resistance
Both Grade 80 and Grade 100 chains offer good flexibility, but Grade 100 chains generally have better fatigue resistance due to their enhanced strength. This makes them more suitable for continuous or high-cycle lifting applications.
Grade 80 chains are often used in general lifting, towing, and tie-down applications. Grade 100 chains, with their higher strength, are preferred for heavy-duty lifting, particularly in industries like construction and mining.
Grade 100 chains are typically more expensive than Grade 80 chains due to their higher strength and manufacturing process. However, the investment may be justified for applications that require lifting heavier loads.
|Grade 80 Chain
|Grade 100 Chain
|Heat-treated alloy steel
|Refined alloy steel
|Higher (25% more)
|Working Load Limit
|General lifting, towing
Choosing between Grade 80 and Grade 100 chains depends on the specific requirements of the lifting task. Understanding their differences in terms of strength, load capacity, and application suitability is crucial for safe and efficient lifting operations.