ISO 1835:2018

Round steel short link chains for lifting purposes - Medium tolerance sling chains - Grade 4, stainless steel

This document specifies the requirements for medium tolerance sling chains of grade 4 from stainless steel for use preferably in chain slings of grade 4 from stainless steel or for other lifting purposes. The range of nominal diameter, dn, covered by this document is from 4 mm to 22 mm. These sling chains are round steel short link chains with a nominal pitch, pn = 3 × dn, electrically welded, solution-annealed and tested. They are for use in the temperature range ?100 °C to +400 °C. They comply with the general conditions of acceptance of ISO 1834. NOTE 1 Because sling chains are solution-annealed in the finished condition, they can be used without restrictions with regard to the corrosion resistance of the steels according to 5.2. Higher grades of stainless steel chains are achieved by cold drawing of the wire prior to the chain manufacturing. Therefore, solution annealing is not possible without reduction of strength. The weld seam, in particular, represents a critical area with regard to the corrosion resistance. NOTE 2 Resistance butt welding and flash welding are listed in ISO 4063.

Chaînes de levage en acier de section ronde à maillons courts — Chaînes d'élingue de tolérance moyenne — Classe de qualité 4, acier inoxydable

General Information

• Status: Published
• Publication Date: 29-Aug-2018
• ICS: 53.020.30 - Accessories for lifting equipment
• Technical Committee: ISO/TC 111/SC 1 - Chains and chain slings
• Drafting Committee: ISO/TC 111/SC 1 - Chains and chain slings
• Current Stage: 9093 - International Standard confirmed
• Start Date: 04-Oct-2023
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 1835:1980 - Short link chain for lifting purposes - Grade M (4), non-calibrated, for chain slings etc.
• Effective Date: 22-Jul-2017

Overview

ISO 1835:2018 specifies requirements for round steel short link sling chains - Grade 4, stainless steel used for lifting purposes. It covers medium-tolerance sling chains with nominal diameters from 4 mm to 22 mm, electrically welded, solution-annealed and tested. Chains conforming to ISO 1835:2018 are intended primarily for chain slings of grade 4 stainless steel or other lifting applications and are suitable for service temperatures from −100 °C to +400 °C. The standard complements the general conditions of acceptance in ISO 1834.

Key Topics

• Scope and sizing
  • Nominal diameter (dn) range: 4–22 mm.
  • Nominal pitch: pn = 3 × dn.
  • Dimensions, masses and designation rules are defined (calculation bases in annexes).
• Material
  • Austenitic, molybdenum-alloyed stainless steels resistant to intergranular corrosion (example: X6CrNiMoTi17-12-2 / S31635).
  • Solution annealing required to secure corrosion resistance after manufacture.
• Heat treatment & surface
  • Solution anneal at defined temperatures (see ISO 16143-2) and rapid cooling.
  • Pickling after heat treatment to ensure a smooth, corrosion-resistant surface.
• Manufacture & welding
  • Electrical welding of links; weld seam is a critical corrosion area.
  • Welding processes such as resistance butt and flash welding are referenced (ISO 4063).
• Mechanical requirements & testing
  • Working Load Limit (WLL), Manufacturing Proof Force (MPF), Breaking Force (BF), bend deflection and elongation requirements.
  • Mandatory tests: dimensional checks, tensile tests (calibrated machines per ISO 7500-1), bend tests, sampling and lot sizes.
• Marking and traceability
  • Grade marking, manufacturer identification, traceability marks and manufacturer’s certificate requirements.
• Environmental aspects
  • Considered within the standard and manufacturing practices.

Applications

• Selection and manufacture of chain slings, lifting assemblies and rigging used in maritime, offshore, chemical and general industrial environments where corrosion resistance and elevated temperature performance are required.
• Used by chain manufacturers, lifting equipment designers, rigging and lifting engineers, safety inspectors, procurement teams and testing laboratories to specify, produce and verify compliant stainless-steel sling chains.
• Useful for ensuring safety, traceability and conformity in lifting operations subject to regulatory and workplace safety requirements.

Related Standards

• ISO 1834 - Short link chain for lifting purposes - General conditions of acceptance
• ISO 16143-2 - Stainless steels for general purposes (heat treatment guidance)
• ISO 4063 - Welding and allied processes (welding process classification)
• ISO 7500-1, ISO 13385-1 - Test machine calibration and measurement equipment
• ISO 15510 - Chemical compositions and material identification

Keywords: ISO 1835:2018, sling chains, stainless steel, grade 4, short link chain, lifting, solution-annealed, working load limit, chain slings.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 1835
Second edition
2018-08
Round steel short link chains for
lifting purposes — Medium tolerance
sling chains — Grade 4, stainless steel
Chaînes de levage en acier de section ronde à maillons courts —
Chaînes de élingue de tolérance moyenne — Classe de qualité 4, acier
inoxydable
Reference number
©
ISO 2018
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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Published in Switzerland
ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions, masses and designation . 2
4.1 Dimensions and masses . 2
4.2 Designation . 4
5 Requirements . 5
5.1 General . 5
5.2 Material . 5
5.3 Heat treatment . 5
5.4 Surface condition . 5
5.5 Dimensions . 5
5.5.1 Diameter . 5
5.5.2 Pitch . 5
5.5.3 Width . 5
5.5.4 Weld dimensions . 5
5.5.5 Length dimensionally affected by welding . 6
5.6 Working load limit (WLL) . 6
5.7 Mechanical properties . 6
5.7.1 General. 6
5.7.2 Manufacturing proof force (MPF) . 7
5.7.3 Breaking force (BF) . 7
5.7.4 Bend deflection, f . 7
5.7.5 Total ultimate elongation, A . 7
6 Tests . 7
6.1 General . 7
6.2 Size of lot . 7
6.3 Sampling . 7
6.4 Dimension test . 7
6.5 Tensile test . 8
6.5.1 Testing machine . 8
6.5.2 Procedure . 8
6.6 Bend test . 8
6.6.1 Testing machine . 8
6.6.2 Procedure . 8
7 Marking . 9
7.1 Grade marking . 9
7.2 Manufacturer’s marking . 9
7.3 Traceability marking . 9
8 Manufacturer’s certificate . 9
9 Use .10
10 Environmental aspects .10
Annex A (informative) Bases for calculation .11
Annex B (informative) Mass of sling chains.14
Annex C (informative) Force-deflection-diagram .15
Bibliography .17
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
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on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
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expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 111, Round steel link chains, chain slings,
components and accessories, Subcommittee SC 1, Chains and chain slings.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
This second edition cancels and replaces the first edition (ISO 1835:1980), which has been technically
revised. The main changes compared to the previous edition are as follows:
— change of material requirements towards stainless steel;
— modernization of the document structure and layout, following the structure already implemented
in the latest publications of ISO/TC 111/SC 1;
— consideration of current nominal diameters of chain and requirements;
— environmental aspects have been considered.
iv © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 1835:2018(E)
Round steel short link chains for lifting purposes —
Medium tolerance sling chains — Grade 4, stainless steel
1 Scope
This document specifies the requirements for medium tolerance sling chains of grade 4 from stainless
steel for use preferably in chain slings of grade 4 from stainless steel or for other lifting purposes.
The range of nominal diameter, d , covered by this document is from 4 mm to 22 mm.
n
These sling chains are round steel short link chains with a nominal pitch, p = 3 × d , electrically
n n
welded, solution-annealed and tested. They are for use in the temperature range –100 °C to +400 °C.
They comply with the general conditions of acceptance of ISO 1834.
NOTE 1 Because sling chains are solution-annealed in the finished condition, they can be used without
restrictions with regard to the corrosion resistance of the steels according to 5.2. Higher grades of stainless steel
chains are achieved by cold drawing of the wire prior to the chain manufacturing. Therefore, solution annealing
is not possible without reduction of strength. The weld seam, in particular, represents a critical area with regard
to the corrosion resistance.
NOTE 2 Resistance butt welding and flash welding are listed in ISO 4063.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1834, Short link chain for lifting purposes — General conditions of acceptance
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 13385-1, Geometrical product specifications (GPS) — Dimensional measuring equipment — Part 1:
Callipers; Design and metrological characteristics
ISO 16143-2, Stainless steels for general purposes — Part 2: Corrosion-resistant semi-finished products,
bars, rods and sections
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1834 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Dimensions, masses and designation
4.1 Dimensions and masses
The bases for calculation of the values for the dimensions listed in Table 1 are given in Annex A.
The bases for calculation of the values for the mass per metre listed in Table B.1 are given in Annex B.
The nominal diameter, d , of the sling chain corresponds to the nominal diameter of the steel wire as
n
presented in ISO 16124, or bar as presented in ISO 1035-1, from which the sling chain is made.
Preferred nominal diameters are given in Table 1, column 1. Other nominal diameters may be used,
provided the corresponding dimensions and tolerances are calculated in accordance with Annex A.
Table 1 — Dimensions
Dimensions in millimetres
1 2 3 4 5 6 7 8 9
Diameter Pitch Width Weld dimension
d p Internal External Internal
Nominal Tolerance Nominal Tolerance Type 1 Types 1 Type 2 Types 1 Type 2
and 2 and 2
d p w w w 2r G
n n 1 2
...