Towing chain ASTM Grade 43

carbon steelpolished steelhot-dip galvanised steel

Overview
ASTM Grade 43 High Test chain for general utility and industrial applications. Available finishes: polished, hot-dip galvanized and zinc-painted. Offered in long-link (NACM) and short-link (ASTM 80) designs with identical strength ratings.

Introduction
Manufactured from low carbon steel, ASTM Grade 43 High Test chain is intended for farm, logging, towing, switching and general industry use. Long-link versions (NACM) provide longer inside length to reduce weight and cost while maintaining the same working load limits as short-link (ASTM 80). Working load limits, proof test and minimum breaking forces are specified per nominal size.

Nominal Chain Size Table
Nominal Size | Material Dia (mm) | Material Dia (in) | WLL (lbs) | Proof Test (lbs) | Min Break (lbs) | Inside Length (mm) | Inside Width (mm)
1/4" | 7.0 | 0.276 | 2,600 | 3,900 | 7,800 | 31.5 | 9.8
5/16" | 8.7 | 0.343 | 3,900 | 5,850 | 11,700 | 32.8 | 11.2
3/8" | 10.3 | 0.406 | 5,400 | 8,100 | 16,200 | 35.0 | 14.0
1/2" | 13.5 | 0.531 | 9,200 | 13,800 | 27,600 | 45.5 | 18.2
3/4" | 20.0 | 0.787 | 20,200 | 30,300 | 60,600 | 70.0 | 25.0

Parameter (Size / Dimensions / Loads / Weight per m)
Size (mm) | D (mm) | Inside Length A (mm) | Outside Width B (mm) | Working Load (kg) | Test Load (N) | Breaking Load (N) | Weight per m (kg)
3 | 0.5 | 26 | 12 | 55 | 1050 | 3200 | 0.15
5 | 0.5 | 35 | 20 | 160 | 3150 | 10000 | 0.43
8 | 0.5 | 52 | 32 | 400 | 8000 | 25000 | 1.10
12 | 1.0 | 78 | 48 | 940 | 18800 | 56500 | 2.55
20 | 1.0 | 120 | 75 | 2500 | 50000 | 160000 | 7.00

Standards and Packaging
Standards: ASTM Grade 43, ASTM 80 (short link), NACM (long link option). MOQ: 100 meters. Packaging: carton with steel pallet for bulk orders.

Notes on Types and Finishes

• Material: low carbon steel.
• Finishes available: polished, hot-dip galvanized, zinc painted, electro-galvanized.
• Link types: long link (NACM) and short link (ASTM 80); both share the same strength ratings; long link saves weight.
• Typical applications: agriculture, logging, towing, switching, construction and general industry.

Characteristics / Technical specifications

• Product name/series: ASTM Grade 43 High Test Chain.
• Available nominal sizes: imperial 1/4"–7/8" and metric 3–32 mm (see tables for full dimensions).
• Load data: working load limits, proof test loads and minimum breaking forces specified per size.
• Weight per meter and inside dimensions provided per size.
• MOQ: 100 meters; standard packaging: carton + steel pallet.