IS 4521:2001
Black steel wire ropes, stranded wire and cables
BIS QCO · ISI MARK · 4 LINES · STEEL AND STEEL PRODUCTS QUALITY CONTROL ORDER, NOTIFIED VIDE S.O. 2581(E) AND S.O. 4327(E)
IS 4521 specifies the requirements for steel wire ropes and strands for general engineering applications, including dimensions, lay construction, wire grade, breaking load and zinc-coating mass for galvanised variants. The standard covers black and galvanised wire ropes supplied for lifting, hauling and rigging.
At a glance
4
Tariff lines covered (8-digit HSN)
Chapter 73
Primary HSN chapter
ISI
Mark scheme
Steel and Steel Products Quality Control Order, notified vide S.O. 2581(E) and S.O. 4327(E)
Governing Quality Control Order
Tariff lines covered
Heading 7312
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Speak to an Expert Last verified against gazette notifications: 2026-05-16. Source: BIS / Indian Customs CUSDATA.
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