Lifting Chains
GRADE 100 ALLOY CHAIN ASTM973
Grade 100 alloy chain manufactured to ASTM A973 specifications, designed for overhead lifting with a 4:1 design factor. Made from high-quality alloy steel, quenched and tempered, with a blue or black electrophoretic finish. Available in nominal sizes from 7/32 inch to 7/8 inch, with working load limits up to 42,700 lbs. Suitable for lifting applications requiring higher strength and reduced chain weight compared to Grade 80.
- Material
- The highest quality alloy steel Processing: Welded
- Finish
- Electrophoresis Ultimate load is 4 times at working load limit
- Packing
- Drum + Steel pallets
- Catalogue Family
- Lifting Chains
- Certificates
- EN 10204 3.1 material test certificate on request
CAD files are supplied on request via WhatsApp or email rather than published for open download.
Key Benefits
What Grade 100 Alloy Chain ASTM973 Gives You
- Meets ASTM A973 standard with a 4:1 design factor for safe overhead lifting
- stronger than Grade 80 chain, allowing lighter chain for the same load
- Quenched and tempered alloy steel provides high tensile strength and impact resistance
- Electrophoretic finish resists corrosion in industrial and outdoor environments
- Proof load tested and validated to meet minimum breaking force requirements
- Welded construction ensures consistent joint strength across the chain link
- Available in both blue and black electrophoretic finishes for identification and protection
Application Scenarios
Where Grade 100 Alloy Chain ASTM973 Is Used
- Overhead crane operations in steel mills and manufacturing plants where high strength and reliability are critical
- Heavy lifting in shipyards and offshore platforms using chain for rigging and hoisting
- Industrial maintenance lifts in power stations and refineries where chain must withstand repeated loading
- Material handling in ports and logistics hubs where chain is used in overhead trolleys and hoists
- Construction site lifting where space and weight savings are needed without sacrificing safety
- Lifting operations in mining and quarrying where chain is exposed to abrasive and harsh conditions
- Temporary rigging setups requiring a durable, reusable lifting component with traceable WLL
Who It Is For
Buyers This Product Is Built For
- Industrial crane operators specifying chain for overhead lifting systems
- Rigging contractors sourcing chain with certified proof load and material test data
- Manufacturers of lifting equipment needing compliant chain for assembly and integration
- Marine and offshore service providers requiring chain that meets ASTM A973 standards
- Logistics and warehouse managers selecting chain for overhead trolley systems
- Engineering firms specifying chain for structural lifting and load testing projects
- Rigging distributors offering Grade 100 chain as a premium alternative to Grade 80
Problems It Solves
Problems This Product Removes
- Reduced chain weight for equivalent load capacity compared to Grade 80, saving on material and handling
- Eliminates the need for oversized chain in applications where Grade 80 would be over-engineered
- Provides a certified, traceable chain with proof load testing and material test certificates
- Prevents premature failure due to inadequate heat treatment or material quality
- Offers a durable finish that resists corrosion in humid or chemical-exposed environments
- Solves the problem of inconsistent joint strength in poorly welded or untested chain
- Removes the need to source chain from multiple suppliers by offering a single, compliant product
Technical Features
Technical Features
- Manufactured to ASTM A973 specification for Grade 100 alloy chain
- Made from high-quality alloy steel, quenched and tempered for strength and toughness
- Welded link construction with consistent joint integrity
- Proof load tested to confirm minimum breaking force at four times the working load limit
- Blue or black electrophoretic finish applied for corrosion resistance and visual identification
- Working load limit stamped on each chain segment for traceability and field use
- Designed with a 4:1 standard design factor as required by ASTM A973
- Inside length and width dimensions meet published tolerances for fit and function
- Available in nominal sizes from 7/32 inch to 7/8 inch with corresponding WLL and proof load values
Specifications
Grade 100 Alloy Chain ASTM973 Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Nominal Chain Size | 7/32 inch to 7/8 inch |
|---|---|
| Material | High-quality alloy steel |
| Processing | Welded, quenched and tempered |
| Surface Finish | Blue electrophoresis or black electrophoresis |
| Design Factor | 4:1 as required by ASTM A973 |
| Working Load Limit | 2,700 lbs to 42,700 lbs |
| Proof Test Load | 5,400 lbs to 85,400 lbs |
| Minimum Breaking Force | 10,800 lbs to 170,800 lbs |
| Inside Length (Max) | 0.7 in to 2.8 in |
| Inside Width Range | 0.281–0.325 in to 1.080–1.300 in |
| Certificates | Material Test Certificate to EN 10204 3.1 on request |
Full size table on request. The catalogue publishes a full dimension and capacity table for this item. Ask on WhatsApp or by email and we will send it as a PDF.
Materials
Materials And Finishes
- High-quality alloy steel used for the chain links and welds
- Quenched and tempered heat treatment to achieve required tensile strength
- Electrophoretic coating applied after welding to prevent surface corrosion
- Blue or black finish for visual distinction and environmental protection
- Welded joints made with precision to maintain strength and alignment
Manufacturing Process
How This Product Is Made
1Raw alloy steel material selected and inspected for quality
2Chain links formed and welded using automated welding equipment
3Quench and temper heat treatment applied to achieve required hardness and strength
4Proof load testing performed on production batches
5Electrophoretic finish applied in a controlled coating line
6Working load limit stamped on each chain segment
7Final dimensional and visual inspection before packing
Quality Control
Quality Control On Every Batch
- Proof load test conducted on each production batch before release
- Dimensional tolerance check against published inside length and width
- Breaking strength validation to confirm minimum breaking force at four times WLL
- Material Test Certificate to EN 10204 3.1 issued with the order on request
- Visual inspection for weld integrity, surface defects, and finish uniformity
- Third-party inspection accepted at the Qingdao warehouse before shipment
Documentation
Certification And Documentation Supplied
- Material Test Certificate to EN 10204 3.1 supplied with orders on request
- Proof load testing and breaking strength validation documented per ASTM A973
- Working load limit stamped on the chain for traceability
Customisation
Customisation Options
- Custom tonnage stamping on chain segments
- Private label and OEM marking available
- Finish to order in blue or black electrophoresis
- Custom lengths and configurations built to a drawing
- Packing configured with drum and steel pallets as standard, or adjusted for customer needs
Compare
How It Compares With The Alternatives
An honest read on where this pattern wins and where another one would serve you better.
| Alternative | Honest Trade Off |
|---|---|
| Grade 80 Chain | Grade 100 offers 25 percent higher strength, allowing lighter chain for the same load, reducing weight and cost in overhead lifting |
| Galvanized Chain | Electrophoretic finish provides better corrosion resistance in indoor and controlled environments, while galvanized chain is better for outdoor exposure |
| Wire Rope | Chain offers higher durability and resistance to abrasion and crushing, but wire rope is lighter and more flexible for long spans |
| Stainless Steel Chain | Grade 100 alloy chain is stronger and more cost-effective for general lifting, while stainless steel is better for chemical or marine environments |
Use Guide
How To Use And Inspect Grade 100 Alloy Chain ASTM973
- Always verify the stamped working load limit matches the calculated load before lifting
- Do not exceed the maximum working load limit under any circumstances
- Inspect chain before each use for signs of wear, deformation, or coating damage
- Ensure the chain is properly aligned in the hoist or lifting device to avoid side loading
- Use only with compatible fittings and hardware rated for the same working load
- Replace chain immediately if the weld shows cracking, the link is deformed, or the marking is illegible
- Store chain in a dry, clean area to preserve the electrophoretic finish and prevent contamination
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Answers
Grade 100 Alloy Chain ASTM973 FAQ
What is the design factor for this chain?
A 4:1 design factor is standard, as required by ASTM A973. The minimum breaking force is four times the stated working load limit.
Is this chain proof load tested?
Yes. Each production batch is proof load tested to confirm the minimum breaking force and ensure compliance with ASTM A973.
What finishes are available?
Blue electrophoresis or black electrophoresis finish. Custom surface finishes are available on request.
Can you supply material test certificates?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with the order on request, with full traceability of the batch.
What is the difference between Grade 100 and Grade 80 chain?
Grade 100 is stronger than Grade 80, allowing lighter chain for the same load, reducing weight and cost in overhead lifting applications.
How is the chain packed for export?
Standard packing is in drums on steel pallets. Custom packing configurations are available to suit warehouse or retail requirements.
What sizes are available?
Nominal sizes range from 7/32 inch to 7/8 inch. The full size table includes working load limit, proof load, and dimensions for each size.
Need A Quote On Grade 100 Alloy Chain ASTM973
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