Grade 80 Links
G80 Master Link Assembly A345 US Type
A forged G80 master link assembly with a welded sub-link, designed for use in 3 or 4 leg chain slings. It meets or exceeds ASME B30.26 requirements for identification, ductility, design factor, proof load, and temperature performance. The oblong shape and US-type configuration suit high-duty lifting applications in industrial and marine environments. Available in sizes from 1/4 inch to 1 inch chain diameter with working load limits up to 72.6 tons.
- Material
- Forged Super Alloy Steel Suitable for EN818-2 CHAIN Individually proof test at 2.5 times Working Load Limited.
- Catalogue Family
- Grade 80 Links
- 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 G80 Master Link Assembly A345 US Type Gives You
- Forged super alloy steel body provides high strength and impact resistance for heavy lifting operations
- Welded sub-link ensures a secure connection point for chain sling assemblies
- Individually proof load tested to verify integrity
- Marked with size, WLL, and CE symbol for traceability and compliance
- Ultimate load capacity is four times the working load limit as standard
- Powder plastified red or yellow finish resists corrosion and improves visibility
- Designed for use in 3 and 4 leg chain sling configurations with consistent load distribution
Application Scenarios
Where G80 Master Link Assembly A345 US Type Is Used
- Lifting and rigging operations in offshore platforms where chain slings must handle dynamic loads and environmental exposure
- Heavy industrial lifting in steel mills and manufacturing plants using multi-leg chain slings
- Marine cargo handling at ports where chain slings are exposed to saltwater and repeated stress
- Construction site lifting of large structural components with 3 or 4 leg chain sling setups
- Oil and gas field operations requiring reliable, traceable master links in high-stress environments
- Transport and logistics applications involving heavy machinery and equipment with chain-based rigging
Who It Is For
Buyers This Product Is Built For
- Rigging contractors sourcing complete chain sling assemblies with certified master links
- Marine and offshore project engineers specifying ASME B30.26 compliant lifting hardware
- Industrial plant maintenance teams replacing worn master links in existing chain slings
- Logistics and freight operators using chain slings for heavy cargo transport
- Manufacturers of lifting equipment requiring certified master links for integration into their products
Problems It Solves
Problems This Product Removes
- Replacing unreliable or non-compliant master links that fail under proof load testing
- Avoiding chain sling failure due to weak or improperly welded sub-links
- Eliminating the risk of missing or illegible WLL markings on lifting gear
- Reducing downtime caused by non-compliant or untraceable rigging components
- Sourcing a single, certified master link that meets ASME B30.26 standards without needing to verify each batch
- Managing multiple suppliers for chain components by consolidating master links and sub-assemblies on one order
Technical Features
Technical Features
- Forged main link in G80 grade super alloy steel for high tensile strength
- Welded sub-link with consistent joint integrity for secure chain connection
- Individually proof load tested
- Ultimate breaking load is four times the safe working load as per standard design factor
- Marked with size, WLL, and CE symbol for traceability and compliance
- Powder plastified red or yellow finish for corrosion resistance and visual identification
- Designed for use in 3 and 4 leg chain sling configurations with oblong geometry
- Dimensions conform to US-type master link standards with tolerance ranges specified
Specifications
G80 Master Link Assembly A345 US Type Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Material | Forged super alloy steel |
|---|---|
| Grade | G80 |
| Design Factor | 4:1 minimum breaking load to safe working load |
| Proof Load Test | the published multiple of the working load limit per batch |
| Surface Finish | Powder plastified red or yellow |
| Marking | Size + WLL + CE symbol stamped on body |
| Chain Size Range | 1/4 inch to 1 inch |
| WLL Range | 3.15 to 72.6 tons |
| Ultimate Load | 4 times the working load limit |
| Dimensions | A, B, D, a, b, d as per table in source text |
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
- Forged super alloy steel for the main link body with high tensile strength and ductility
- Welded sub-link made from matching G80 grade material for consistent strength
- Powder plastified coating in red or yellow for surface protection and visibility
- working load limit marking applied via stamping for compliance and traceability
Manufacturing Process
How This Product Is Made
1Forging of the main link blank from high-grade alloy steel
2Heat treatment to achieve G80 mechanical properties
3Machining of the link bore and attachment points
4Welding of the sub-link with controlled parameters to ensure joint integrity
5Surface finishing via powder plastification in red or yellow
6Stamping of size, WLL, and CE symbol on the main link
7Individual proof load testing
8Final inspection and packing for export
Quality Control
Quality Control On Every Batch
- Proof load test on each production batch at the published multiple of the working load limit
- Dimensional tolerance check against published size table
- Breaking strength validation to confirm 4:1 design factor
- Visual inspection of weld quality and surface finish
- Marking legibility and compliance check for size, WLL, and CE symbol
- Material Test Certificate to EN 10204 3.1 supplied with orders
- 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
- Working load limit and traceability marking stamped on the body
- Complies with ASME B30.26 requirements for identification, ductility, design factor, proof load, and temperature
Customisation
Customisation Options
- Custom tonnage stamping on the main link body
- Private label and OEM marking available
- Surface finish to order in powder plastified red, yellow, or other colours
- Custom dimensions and assembly configurations built to a supplied drawing
- Packing carton and pallet configuration tailored to warehouse or retail 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 |
|---|---|
| Standard forged master link without welded sub-link | The welded sub-link provides a more secure connection point for chain sling assemblies, reducing the risk of link separation under dynamic load |
| Lower grade master link (e.g. Grade 43 or 70) | G80 grade offers higher tensile strength and better performance under repeated loading and high-temperature conditions |
| Cast master link | Forged construction provides superior impact resistance and ductility compared to cast links, which are more prone to brittle failure |
| Master link with screw pin | The welded sub-link eliminates the risk of pin loosening under vibration, unlike screw pin designs that require regular inspection |
Use Guide
How To Use And Inspect G80 Master Link Assembly A345 US Type
- Verify the stamped WLL matches the calculated load before use
- Inspect the weld joint and surface finish for damage or corrosion before each lift
- Ensure the chain is properly seated in the link bore and the sub-link is fully engaged
- Do not exceed the working load limit or use the link in side-loading conditions
- Retire the link if the marking is illegible, the body shows deformation, or the weld is cracked
- Store in a dry, clean area to prevent corrosion and maintain surface integrity
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Guides Worth Reading Before You Order
Answers
G80 Master Link Assembly A345 US Type FAQ
What is the proof load test multiple for these master links?
Each master link is individually proof load tested to verify structural integrity before release.
Is the design factor 4:1 for these master links?
Yes. The minimum breaking load is four times the safe working load, as standard for rigging hardware unless otherwise stated.
What certificates are provided with the order?
A Material Test Certificate to EN 10204 3.1 is supplied with every order. Proof load and breaking strength data are recorded and available on request.
Can you custom stamp our brand and tonnage?
Yes. Custom tonnage stamping, private label marking, and OEM packaging are standard options. The finish can be powder plastified in red, yellow, or other colours.
What is the surface finish and how does it resist corrosion?
The finish is powder plastified in red or yellow. This coating provides a durable barrier against moisture, salt, and abrasion in industrial and marine environments.
Are these master links suitable for 3 or 4 leg chain slings?
Yes. The oblong US-type design is specifically intended for use in 3 and 4 leg chain sling assemblies with consistent load distribution.
What is the lead time for standard sizes?
For common sizes held in semi-finished stock, lead time is about 15 to 20 days. New production takes about 25 days plus 7 days packing, totaling about 35 days before shipment.
Need A Quote On G80 Master Link Assembly A345 US Type
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