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  • BSI
    20/30409821 DC BS ISO 4779. Chain components for lifting purposes. Forged eye hook with point and latch. Grade 4, stainless steel, solution annealed
    Edition: 2020
    $42.22
    / user per year

Description of 20/30409821 DC 2020

This document specifies the requirements for forged eye hooks with point and latch of grade 4 from stainless steel and solution annealed for use preferably as a component in chain slings of welded construction of grade 4 from stainless steel and solution annealed.

IMPORTANT

For other applications, e.g. steel wire rope slings or textile slings, it is important that the hook design is checked to ensure its fitness for a safe use.

NOTE

The grade for the hook according to this document is taken from the grade of the sling chain according to ISO 1835. Both (chain slings and hooks) have identical scopes and values for the working load limit (WLL) according to Table 2 and values for the mechanical requirements according to Table 3. Thus, the direct correlation of hooks to the sling chain is given by the WLL and especially the code system on the product body itself. The grade of the hook does not define any values of the tensile strength of the hook material.

The range of the nominal diameter dn of the associated sling chain according to ISO 1835 is from 4 mm to 22 mm.

Hooks according to this document are for use in the temperature range –100 °C to +400 °C.

These hooks are solution annealed in the finished condition and can therefore be used without restrictions with regard to the corrosion resistance of the steels according to Clause 5.1.

NOTE

The term “eye hook with point and latch” is taken from ISO 1837, Figure 5.



Standard Number20/30409821 DC
TitleBS ISO 4779. Chain components for lifting purposes. Forged eye hook with point and latch. Grade 4, stainless steel, solution annealed
StatusDefinitive
Publication Date2020-11-17
Identical National Standard OfISO/DIS 4779
DescriptorsComponents, Chains, Forging, Alloys, Stainless steels
ICS53.020.30 Accessories for lifting equipment
CommitteeMHE/1
PublisherBSI
Pages21

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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