Grade 80 Links
G80 Welded Master Link Assembly A347
A high tensile alloy steel welded master link assembly in Grade 80, designed for use in single leg or 3 to 4 leg chain slings. It serves as a secure connection point between the lifting device and the chain system. The assembly features a central master link with welded sub-links, engineered to carry the full working load with a 4:1 design factor. It is proof load tested and finished with red or yellow coating for visibility and corrosion resistance.
- Material
- High tensile Alloy steel. Processing: Forged, Quenched & Tempered. Proof Loading: 2 times Working Load Limit.
- Finish
- Red or Yellow Coated
- 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 Welded Master Link Assembly A347 Gives You
- Welded construction provides a strong, permanent joint with no moving parts to loosen under load
- Grade 80 alloy steel body ensures high tensile strength and resistance to deformation under heavy lifting
- Red or yellow coating improves visibility in the field and offers moderate protection against corrosion
- Designed for use with G80 chain slings in single leg or multi-leg configurations
- Proof load tested to verify structural integrity
- 4:1 design factor standard across all rigging hardware unless otherwise stated
- Welded sub-links allow for direct attachment of multiple sling legs without additional fittings
Application Scenarios
Where G80 Welded Master Link Assembly A347 Is Used
- Lifting heavy steel beams or structural components in construction where a secure, permanent connection is needed
- Connecting multiple chain legs in a 3 or 4 leg sling setup for balanced load distribution
- Industrial rigging in manufacturing plants where chain slings are used to move machinery or large components
- Marine and offshore applications requiring durable, high-strength rigging with minimal maintenance
- Mining and energy projects where chain slings are used in repetitive lifting cycles under harsh conditions
- Port operations involving container handling or heavy cargo transfer using chain-based lifting systems
Who It Is For
Buyers This Product Is Built For
- Rigging contractors sourcing reliable master link assemblies for multi-leg chain sling builds
- Industrial maintenance teams specifying Grade 80 components for heavy lifting in plant environments
- Marine and offshore rigging suppliers needing welded master links for chain sling systems
- Manufacturers of chain slings requiring consistent, high-strength connection hardware
- Logistics and transport firms using chain slings for securing and lifting heavy freight
Problems It Solves
Problems This Product Removes
- Eliminates the need to weld or bolt separate links on-site, reducing assembly time and risk of weak joints
- Prevents loose or misaligned links in multi-leg slings that could cause uneven load distribution
- Provides a permanent, high-strength connection point that resists fatigue and vibration over time
- Reduces the number of components needed in a sling system by combining the master link and sub-links
- Solves the issue of weak or inconsistent welds by using a factory-welded, tested assembly
- Avoids the need for additional shackles or connectors when joining chain legs in multi-leg setups
Technical Features
Technical Features
- Central master link with welded sub-links for multi-leg chain sling integration
- Grade 80 alloy steel body, drop forged, quenched and tempered for high tensile strength
- Proof load tested with documented validation
- Minimum breaking strength 4 times the safe working load as standard
- Red or yellow coating applied for visual identification and surface protection
- WLL and traceability marking stamped on the master link for field use
- Designed to suit G80 chain slings in single leg or 3 to 4 leg configurations
Specifications
G80 Welded Master Link Assembly A347 Specifications
Values published in the Kailipu catalogue for this item. Anything not listed is available on request.
| Material | High tensile alloy steel |
|---|---|
| Processing | Forged, quenched and tempered |
| Proof Load | the published multiple of the working load limit |
| Ultimate Load | 4 times Working Load Limit |
| Surface Finish | Red or yellow coated |
| Grade | G80 |
| Application | For G80 single leg or 3 or 4 leg chain slings |
| WLL Range | 2.36 to 45 ton |
| Chain Size | 7/32 to 1 inch |
| Weight Range | 0.82 to 42.91 kg |
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 tensile alloy steel body, drop forged then quenched and tempered for strength and impact resistance
- Welded sub-links made from the same Grade 80 material to match the master link
- Red or yellow coating applied after welding to improve visibility and resist surface rust
- No additional plating or coating beyond the standard red or yellow finish
Manufacturing Process
How This Product Is Made
1Drop forging of the master link and sub-link blanks
2Quench and temper heat treatment to achieve Grade 80 tensile properties
3Precision machining of weld preparation surfaces
4Factory welding of sub-links to the master link using controlled parameters
5Post-weld inspection for weld integrity and dimensional accuracy
6Application of red or yellow coating for corrosion resistance and visual identification
7Proof load testing on production batches
8Stamping of WLL and traceability markings
9Final inspection and packing
Quality Control
Quality Control On Every Batch
- Proof load test conducted 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 and structural inspection of welds for defects
- Material Test Certificate to EN 10204 3.1 supplied with orders
- WLL and traceability marking verified on every unit
- 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
Customisation
Customisation Options
- Custom tonnage stamping on the master link
- Private label and OEM marking available
- Finish to order in red or yellow coating
- Custom sizes and configurations built to a supplied drawing
- Packing carton and pallet configuration tailored to customer warehouse or shipping 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 |
|---|---|
| Screw pin shackle | The welded master link has no moving parts and cannot loosen under vibration, unlike a screw pin shackle which requires regular inspection and retightening |
| Rigid forged master link | The welded version allows for integrated multi-leg attachment points, while a forged link typically requires separate fittings for additional legs |
| Bolted link assembly | Welded construction eliminates the need for bolts and nuts, reducing the risk of missing or loose components in high-vibration environments |
Use Guide
How To Use And Inspect G80 Welded Master Link Assembly A347
- Verify the stamped working load limit matches the calculated load before use
- Inspect the welds and coating for damage before each lift
- Ensure the chain is properly seated in the master link and sub-links
- Do not exceed the rated WLL for the assembly or the chain it is connected to
- Avoid side loading the master link, which can cause stress on the welds
- Retire the assembly if the weld shows cracking, the coating is severely damaged, or the marking is illegible
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Guides Worth Reading Before You Order
Answers
G80 Welded Master Link Assembly A347 FAQ
What is the design factor for this master link?
A standard 4:1 design factor applies, meaning the minimum breaking strength is four times the stated working load limit. This is consistent across all Kailipu rigging hardware unless otherwise specified.
Is proof load testing performed on these assemblies?
Yes. Each production batch is proof load tested. Breaking strength validation is also performed to confirm the 4:1 design factor.
What finish is applied to the master link?
The standard finish is red or yellow coating. Custom surface finishes including zinc plating or powder coating are available on request.
Can the working load limit be stamped in a different tonnage?
Yes. Custom tonnage stamping is available. The WLL marking can be adjusted to match your specific application or customer requirement.
Are Material Test Certificates provided?
Yes. A Material Test Certificate to EN 10204 3.1 is supplied with every order. It confirms the material composition and mechanical properties of the Grade 80 alloy steel.
What sizes are available?
The range spans from 7/32 inch to 1 inch chain size, with working load limits from 2.36 to 45 ton. The full size table includes dimensions A, B, D, a, b, d, s and weight for each capacity.
How are they packed for export?
Standard packing is in cartons on pallets. We can configure the carton count and pallet pattern to match your warehouse or retail pack. Goods can be held in our Qingdao warehouse free for up to two months to consolidate shipments.
Need A Quote On G80 Welded Master Link Assembly A347
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