Short length of galvanized steel chain with oval links isolated on a white background

Marine Chains

STUDLESS ANCHOR CHAIN

A studless link anchor chain made from high-strength alloy steel, designed for marine anchoring and offshore mooring applications. The chain features smooth, flat links without protruding studs, providing even load distribution and reduced stress concentration. Available in grades R3, R4, R5 and materials including CM490, CM690, stainless steel 316 and 316L, with chain diameters from 68mm to 205mm. Finished in hot dip galvanized or black paint for corrosion resistance in saltwater environments.

Grade: R3, R4, R5 Chain
Material: Hot-rolled anchor steel, CM490, CM690, stainless steel 316, 316L
Catalogue Family: Marine Chains
Certificates: EN 10204 3.1 material test certificate on request

Upload Drawing via WhatsApp Download Marine Chains PDF

CAD files are supplied on request via WhatsApp or email rather than published for open download.

Key Benefits

What Studless Anchor Chain Gives You

Smooth flat links eliminate stress concentration points, improving fatigue life under dynamic marine loads
Even load distribution across the chain reduces localized wear and extends service life
Hot dip galvanized or black painted finish resists corrosion from saltwater and harsh marine exposure
High-strength alloy steel construction ensures reliable performance under heavy anchoring and mooring forces

Studless design allows for smoother passage through chain stoppers, windlasses, and fairleads
Flexible yet strong profile maintains integrity during repeated tension and slack cycles at sea
Complies with marine standards including DIN 1480, DIN 1478, EN 1492-1, and EN 1492-2 for offshore use

Application Scenarios

Where Studless Anchor Chain Is Used

Offshore platform mooring where chains are subjected to continuous dynamic loads and saltwater exposure
Deep-sea anchoring for large vessels and offshore supply ships requiring high fatigue resistance
Marine terminal mooring systems with frequent chain movement through windlasses and fairleads

Harbor and port infrastructure where chains are exposed to tidal action and salt spray
Vessel anchoring in rough seas where chain flexibility and strength under shock loads are critical
Subsea equipment deployment and recovery using mooring chains with high reliability under tension

Who It Is For

Buyers This Product Is Built For

Marine equipment suppliers specifying mooring and anchoring chains for offshore vessels
Shipyards and shipbuilders sourcing chains for newbuild vessels and offshore platforms
Port and terminal operators managing mooring systems for large container and bulk carriers

Oil and gas operators deploying offshore installations requiring certified mooring chains
Marine contractors handling anchor handling and mooring operations in coastal and deepwater zones
Rigging and marine hardware distributors carrying a full range of chain types for marine applications

Problems It Solves

Problems This Product Removes

Stress concentration at stud points in stud link chains leading to premature fatigue failure
Rapid corrosion and pitting in saltwater environments due to inadequate surface protection
Chain jamming or binding in windlasses and fairleads caused by protruding studs

Inconsistent load distribution across chain links resulting in uneven wear and reduced lifespan
Need to source multiple chain types from different suppliers for a single vessel or platform project
Lack of traceability and certification for chains used in critical marine safety systems

Technical Features

Studless link design with smooth, flat links for even load distribution and reduced wear
Constructed from hot-rolled anchor steel with grades R3, R4, R5 and materials CM490, CM690, stainless steel 316, 316L
Chain diameter range from 68mm to 205mm, custom lengths available per requirement
Surface finish: hot dip galvanized or black painted for corrosion resistance

Complies with DIN 1480, DIN 1478, EN 1492-1, EN 1492-2, and other marine standards
Marked with working load limit and traceability information on each link
Designed for use in anchoring, mooring, and offshore deployment systems

Specifications

Studless Anchor Chain Specifications

Values published in the Kailipu catalogue for this item. Anything not listed is available on request.

Material	Hot-rolled anchor steel CM490, CM690, stainless steel 316, 316L
Grade	R3, R4, R5
Chain Diameter	68mm to 205mm
Surface Finish	Hot dip galvanized or black painted
Length	Custom per requirement
Working Load Limit	Stamped on each link for traceability

Materials

Materials And Finishes

Hot-rolled anchor steel for high tensile strength and fatigue resistance
CM490 and CM690 alloy steel for high-strength marine applications
Stainless steel 316 and 316L for superior corrosion resistance in aggressive marine environments

Hot dip galvanizing layer for long-term protection against saltwater and atmospheric corrosion
Black paint coating as an alternative finish for non-corrosive or indoor storage use

Manufacturing Process

How This Product Is Made

1Hot rolling of steel billets into anchor chain bars

2Cutting and forming of flat links without studs

3Heat treatment to achieve required tensile strength and hardness

4Welding of links using automated submerged arc welding

5Post-weld stress relief and straightening

6Surface treatment: hot dip galvanizing or black painting

7Proof load testing and dimensional inspection

8Stamping of working load limit and traceability marks

9Packing and preparation for export

Quality Control

Quality Control On Every Batch

Proof load testing on production batches before release
Dimensional tolerance checking against published chain size tables
Breaking strength validation to confirm 4:1 design factor

Visual inspection for weld quality, surface defects, and finish uniformity
Material Test Certificate to EN 10204 3.1 issued with every order
Third-party inspection accepted at the Qingdao warehouse before shipment

Customisation

Customisation Options

Custom chain diameter and length to match specific vessel or platform requirements
Custom material selection including CM490, CM690, stainless steel 316, 316L
Custom grade R3, R4, R5 based on load and environmental conditions
Custom surface finish: hot dip galvanized or black painted

Custom tonnage stamping and traceability marking on links
Private label and OEM marking available
Custom packaging configuration for pallets and cartons

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
Stud link chain	Studless chains reduce stress concentration and wear at link joints, but stud link chains may offer higher strength in certain high-tension applications
Galvanized wire rope	Chain provides higher abrasion resistance and better fatigue life under repeated bending, but wire rope is lighter and more flexible
Plastic-coated chain	Studless chain with galvanization offers superior corrosion resistance in saltwater, but plastic coating can degrade under UV and abrasion
Low carbon steel chain	Studless alloy steel chains have higher tensile strength and fatigue resistance, but low carbon steel is cheaper and easier to weld

Use Guide

How To Use And Inspect Studless Anchor Chain

Verify the stamped working load limit matches the expected load in your application
Inspect the chain for surface damage, weld defects, or signs of corrosion before use
Ensure the chain passes smoothly through windlasses and fairleads without binding
Avoid sharp bends or side loading that can cause localized stress and deformation
Maintain the galvanized or painted finish; repair damaged areas to prevent corrosion
Retire the chain if links show visible deformation, excessive wear, or loss of marking