Grade 80 Links
G80 Oblong Link US Type Welded Master Link A344
A forged super alloy steel oblong link with a welded construction, designed as a master link for Grade 80 chain slings. It features a large inside width and length to accommodate single or multiple leg configurations. Marked with 'G80' or '8' for quick identification, it is suitable for overhead lifting, picking, placing, and towing. Available in sizes from 7/16" to 1 1/4", with powder plastified finish and proof load tested.
- Size
- From 7/16" to 1 1/4" Ultimate load is 4 times at working load limit BF(CHAIN)= 4XWLL, BF(ROPE)=5XWLL
- Material
- Forged Super Alloy Steel -Quenched and Tempered Surface: Powder plastifed
- Packing
- Cartons then pack on pallets
- 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 US Type Master Link Welded A344 Gives You
- Large inside width and length allow for easy attachment of multiple sling legs or chain connections
- Forged super alloy steel body with quenched and tempered treatment ensures high strength and impact resistance
- Powder plastified surface finish resists corrosion and wear in harsh industrial environments
- Stamped with 'G80' or '8' for immediate identification of grade and material
- Welded construction provides a solid, continuous joint without separate pin or bolt
- Designed for use with Grade 80 connect links and chain slings in overhead lifting and towing
- Proof load tested, with a safety factor of 5:1 for rope slings or 4:1 for chain slings
Application Scenarios
Where G80 US Type Master Link Welded A344 Is Used
- Overhead lifting operations where multiple chain legs are connected to a single master link
- Towing and rigging setups requiring a strong, permanent link between chain sections
- Industrial material handling where chain slings are assembled on-site with minimal components
- Marine and offshore applications involving chain slings under dynamic load and salt exposure
- Construction and infrastructure projects using Grade 80 chain systems for lifting heavy structural components
- Maintenance and repair environments where chain slings are reconfigured frequently
Who It Is For
Buyers This Product Is Built For
- Rigging contractors sourcing master links for chain sling assemblies
- Industrial maintenance teams specifying Grade 80 links for overhead lifting
- Marine and offshore service providers building chain slings for mooring and lifting
- Manufacturers of chain slings needing a reliable master link component
- Logistics and transport operators using chain slings for heavy cargo securing
Problems It Solves
Problems This Product Removes
- The need for a robust, permanent link that can handle multiple leg connections without additional hardware
- Difficulty in identifying chain grade on-site when links lack clear marking
- Corrosion and wear on links exposed to outdoor or wet environments
- Inconsistent strength or joint integrity in non-welded or poorly constructed master links
- Lack of traceability and proof testing in low-cost imported rigging components
- The challenge of sourcing a single master link that fits both chain and rope sling systems
Technical Features
Technical Features
- Forged super alloy steel body with quenched and tempered heat treatment
- Welded construction with a continuous joint for high load transfer
- Large inside width and length to fit multiple chain legs or connections
- Stamped with 'G80' or '8' for immediate grade identification
- Powder plastified surface finish for corrosion resistance
- Proof load tested
- Safety factor of 5:1 for rope slings or 4:1 for chain slings as standard
- Available in sizes from 7/16″ to 1 1/4″ with dimensions matching standard chain sizes
Specifications
G80 US Type Master Link Welded A344 Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Capacity Range | 1.12 to 31.5 T working load limit |
|---|---|
| Material | Forged super alloy steel quenched and tempered |
| Surface Finish | Powder plastified |
| Design Factor | 5:1 for rope sling, 4:1 for chain sling |
| Proof Load Test | the published multiple of the working load limit |
| Size Range | 7/16″ to 1 1/4″ |
| Chain Size Compatibility | Matches 1/4″ to 1 1/4″ Grade 80 chain |
| Dimensions | A, B, D, S dimensions per size table in the source text |
| Weight Range | 0.27 kg to 17.3 kg per unit |
| Certificates | Material Test Certificate to EN 10204 3.1 supplied with orders |
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 body with quenched and tempered treatment for high tensile strength
- Powder plastified coating applied over the forged surface for corrosion resistance
- Welded joint using high-strength welding process to maintain structural integrity
- No additional fasteners or pins—construction is fully welded and continuous
Manufacturing Process
How This Product Is Made
1Forging of the oblong link blank from super alloy steel
2Quench and temper heat treatment to achieve required hardness and strength
3Machining of the inside dimensions and weld preparation
4Welding of the link ends with controlled parameters to prevent distortion
5Surface finishing via powder plastification for corrosion protection
6Proof load testing
7Stamping of 'G80' or '8' for grade identification
8Final inspection and packing in cartons on pallets
Quality Control
Quality Control On Every Batch
- Proof load test on production batches at the published multiple of the working load limit
- Dimensional tolerance check against published size table
- Breaking strength validation to confirm 5:1 or 4:1 design factor
- Visual inspection of weld integrity and surface finish
- Material Test Certificate to EN 10204 3.1 issued with each order
- 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 grade stamped on the body for traceability
Customisation
Customisation Options
- Custom tonnage stamping on the link body
- Private label and OEM marking available
- Surface finish to order including powder plastified, zinc plated, or electrophoretic black
- Custom sizes and dimensions built to a supplied drawing
- Packing configuration tailored to carton count and pallet pattern for warehouse or retail use
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 |
|---|---|
| Screw pin shackle | The welded master link has no moving parts, so it does not loosen under vibration, but it cannot be opened for reconfiguration like a shackle |
| Standard forged link | The welded construction offers a continuous joint with no pin, but it is not reusable if damaged unlike a shackle |
| Screw pin master link | The welded version is more secure under dynamic load and does not require a pin or cotter, but it cannot be opened once welded |
| Chain link with bolt | The welded link is stronger and more compact, but it cannot be disassembled for maintenance or reconfiguration |
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