DIN 763 Long-Link Round Steel Chain | Tested Non-Calibrated General-Purpose Chain

DIN 763 Long-Link Round Steel Chain | Tested Non-Calibrated General-Purpose Chain

Product Overview

DIN 763 long-link round steel chain is a welded, tested, non-calibrated chain for general technical use where a larger clear link opening and lower link count per metre are useful. The long pitch provides practical connector clearance and flexible routing, while the non-calibrated geometry means it should not be selected for pocket wheels, calibrated chain drives, or hoisting systems that require matched pitch and certified lifting-chain grades.

For marine supply, the chain can be considered for general securing, safety barriers, equipment retention, and other non-lifting duties, subject to material, corrosion protection, test basis, and project acceptance. It should not be described as a class-approved anchor chain, primary mooring chain, buoy-mooring chain, or lifting chain unless the applicable product standard, design load, testing, and approval scope are separately confirmed.

Quick Specifications

• Standard basis: DIN 763:1990-12 → official designation for tested, non-calibrated, long-link round steel chains.
• Configuration: Open, studless, welded round-link chain → long internal pitch provides connector clearance and reduces the number of links per metre.
• Published DIN nominal range: 4–16 mm in the 1990 edition → supplied sizes outside this range should be treated as DIN 763 pattern / custom sizes until compliance is confirmed.
• Main selection dimensions: Nominal diameter d, inside pitch t, outside width b2, and mass per metre → check against connector size, clearance, and required chain length.
• Manufacturing method: Flash-butt welded link construction → weld consistency, link geometry, and proof testing are key quality-control points.
• Material options: Carbon-manganese steel or stainless steel subject to order → Q195, Q235, CM490, 20Mn2, SUS 304, and SUS 316 are listed in the supplied data; exact grade equivalence requires confirmation.
• Surface treatment: Self-colour, painted, electro-galvanized, or hot-dip galvanized → select according to corrosion exposure and dimensional requirements.
• Load terminology: Working load, test load, and breaking load are separate supplied values → they must not be converted into a lifting WLL or anchor-chain grade without an approved basis.

Main Technical Parameters

Selection & Inquiry Guide

Step 1: Confirm the actual duty and whether DIN 763 general-purpose chain is acceptable. State clearly if the chain is for marine securing, barrier, restraint, static hanging, or another non-lifting function.

Step 2: Confirm nominal diameter d, inside pitch t, outside width b2, total length or length per shot, end-link arrangement, connector size, and required dimensional tolerance.

Step 3: Confirm material grade, required mechanical properties, heat-treatment condition, and whether each ordered size must comply with DIN 763 or may be supplied as a DIN 763 pattern / custom size.

Step 4: Confirm surface condition and exposure: self-colour, anti-corrosive paint, electro-galvanized, hot-dip galvanized, or stainless steel, including any coating-thickness requirement.

Step 5: Confirm the inspection and documentation scope before quotation: material certificate, maker’s test certificate, proof-load test, breaking-load test, third-party witness, or class-related approval subject to agreement.

Step 6: Provide quantity, packing form, delivery destination, required delivery time, application drawing, chain-end details, and reference photos if available.

Structure

Round steel link | Long internal pitch | Open studless link | Flash-butt welded joint | Non-calibrated geometry | Specified surface finish | Cut length or customized shot length

Welding, Testing & Quality Advantages

• Long-link geometry provides a larger clear opening for shackles, hooks, connectors, and routing than a comparable short-link chain, subject to connector-fit verification.
• Flash-butt welding forms a continuous welded link; production control should focus on weld upset, heat-affected zone condition, link shape, and removal of harmful sharp edges.
• Dimensional inspection of d, t, and b2 supports connector compatibility and consistent mass per metre, while acknowledging that DIN 763 is a non-calibrated chain standard.
• Proof-load and breaking-load testing can be arranged according to the agreed test plan; test frequency, sample basis, acceptance criteria, and witness scope should be stated in the purchase order.
• Material selection and heat treatment should be matched to the required mechanical properties. Mild-steel, higher-strength C-Mn steel, and stainless-steel variants should not share one unverified load table.
• Galvanizing or coating improves corrosion resistance, but coating method and thickness should be selected with dimensional clearance, surface condition, and service environment in mind.
• Batch identification, material traceability, and test records can be included according to the agreed documentation scope rather than assumed as standard delivery.

Custom Attributes

• Standard: DIN 763:1990-12 → tested, non-calibrated, long-link round steel chain for general technical use.
• Standard Status: 1990 edition listed as current by DIN Media → DIN 763:2026-03 is a draft and should not be quoted as the final published standard.
• Type: Open, studless, long-link chain → no stud is fitted inside the link.
• Nominal Diameter: 4–16 mm within the published 1990 standard range → 2–32 mm supplier range requires size-by-size confirmation.
• Material: Q195 / Q235 / CM490 / 20Mn2 / SUS 304 / SUS 316 listed in supplied data → exact equivalent specification and mechanical properties to be confirmed.
• Heat Treatment: According to material and target properties → heat-treatment cycle and acceptance values must be stated for higher-strength grades.
• Surface Treatment: Painted / electro-galvanized / hot-dip galvanized / stainless finish → select according to exposure and coating specification.
• Testing: Material test / proof-load test / breaking-load test according to agreed scope → test basis and sampling frequency to be confirmed.
• Use Restriction: General-purpose non-lifting chain → not to be promoted as lifting chain, certified anchor chain, or class-approved mooring chain without separate approval.

How It Works

Retaining or connecting force enters through the end fitting → Rounded links articulate and transmit tensile force through the welded chain → Long pitch provides connector and routing clearance → Agreed testing verifies the supplied batch → Surface protection is selected for the operating environment

Applications

General marine securing | Deck safety chains and barriers | Equipment restraint | Industrial and agricultural general-purpose chain | Non-lifting static chain assemblies | Customized chain lengths for approved project duties

Certifications & Advantages

Inspection and documentation can be arranged according to the project requirement, material traceability, agreed test plan, and approval procedure. No class or third-party certificate should be assumed unless it is included in the quotation and purchase order.

Certification / inspection options, subject to prior confirmation: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS, TÜV, third-party inspection, and Maker’s Test Certificate.

Drawing & Photos

FAQ

Q1: Is DIN 763 long-link chain suitable for lifting?

A1: It should not be selected as an overhead-lifting chain merely because working, test, and breaking loads are shown. Lifting use requires the applicable lifting-chain standard, grade, design factor, marking, testing, and certification.

Q2: Can every size from 2 mm to 32 mm be described as DIN 763?

A2: The published DIN 763:1990-12 scope is commonly identified with nominal diameters from 4 mm to 16 mm. Sizes outside that range should be described as DIN 763 pattern or custom long-link chain until dimensional and mechanical compliance is confirmed by the applicable drawing and test documentation.

Q3: What information is required for a reliable quotation?

A3: Confirm application, nominal diameter, link dimensions, total length or shot length, end-link arrangement, material, heat treatment, surface finish, required working / test / breaking load basis, inspection scope, quantity, packing, destination, and delivery time.