Welded link chain: proof coil Grade 30, high test 43, transport 70, alloy 80 and 100 — material diameter, inside length, inside width (NACM)

sizes

91 in table

Notes

• Each row is one chain size as one source prints it: material diameter (wire diameter of the link), inside length and inside width of one link. Inch rows are inches, millimetre rows are millimetres; the last column converts the three figures (computed here, × 25.4 or ÷ 25.4) so inch and metric sources can be compared. Trade size is the name the maker uses, not a measured dimension: the real wire is larger or smaller than the name (a 1/4 reg link is 0.275 in wire).
• Where the sources print a link style it is kept in the trade-size cell: regular link, long link and ISO short link are different link proportions on the same wire (1/4 Grade 30: 1.020 in regular, 1.240 in long, 1.000 in ISO short inside length, 1st Chain Supply). Compare only like with like.
• The sources are different makers' catalogues and disagree: 1/4 Grade 30 inside length is 1.02 / 1.24 (1st Chain Supply by link style) against 1.24 (Perfection) and wire 0.275 against 0.276; 5/16 inside width is 0.49 (1st Chain Supply) against 0.44 (Perfection); Grade 80 3/8 wire is 0.40 in (McMaster) against 10 mm = 0.394 in (distributor catalogue) and inside length 1.22 in against 30 mm = 1.18 in. Jinbo Marine's NACM 1996/2003 tables give inside length as a maximum and inside width as a minimum; the NACM-style tables of the other sources do not say. The Jinbo transport (Grade 70) table lists '11.9' as the nominal size of its 10.3 mm wire row, and its Grade 43 table '13' for a 13.5 mm wire row; both are copied as printed.
• Grade 80 and Grade 100 are alloy chain for overhead lifting (the headings of the distributor catalogue name EN 818-2 with ASTM A391 for Grade 80 and ASTM A973 for Grade 100); proof coil, high test and transport chain are not for overhead lifting. Working load limits, proof loads and weights per length are printed by every source but are left out here on purpose: use the maker's sheet for the chain you buy, because ratings depend on grade, finish and marking. Grade 70 in the distributor catalogue has no wire diameter column, so none is shown.
• No file: a chain link is an oval of wire with a weld whose end radii and weld upset are not published in these tables, so a drawn link would be invented. McMaster-Carr sells chain with per-part STEP; its lifting-chain and transport-chain categories are linked, not copied. Short-link metric chain: short-link-chain-din-766-din-5685; roller chain is a different product: roller-chain-ansi-b29-1-25-to-80.

Welded link chain: proof coil Grade 30, high test 43, transport 70… size chart

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Xem scan

File coming

No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.

Plain text: sheet.txt · JSON: /api/geometry?object=welded-link-chain-nacm-grades-30-43-70-80-100

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