CARBON STEEL

Chains

heavy-duty, general-utility, and tie-down chains manufactured from high-strength carbon steel in Grades 30, 43, and 70, engineered for marine lashing, barge securing, cargo transport, towing, and industrial tie-down applications.

Available in Grade 30 (Proof Coil), Grade 43 (High Test), and Grade 70 (Transport) carbon steel to match specific tie-down and lashing requirements.

Offered in Hot-Dip Galvanized (HDG), Yellow Chromate, Electro-Galvanized, and Self-Colored finishes for marine and outdoor durability.

Purpose-built for barge tie-downs, deck cargo lashing, logging, vehicle transport, and heavy towing setups.

Manufactured and proof-tested in full accordance with National Association of Chain Manufacturers (NACM) and Department of Transportation (DOT) specifications.

Class	Chain Grade	Standard Finishes	Typical Applications	Primary Advantage
Grade 30 Proof Coil	Grade 30 Low Carbon Steel	Hot-Dip Galvanized, Zinc, Bright	Light Marine, Barriers, General Utility	Economical General-Purpose Utility Chain
Grade 43 High Test	Grade 43 Carbon Steel	Hot-Dip Galvanized, Self-Colored	Barge Lashing, Container Tie-Downs, Towing	Higher Strength-to-Weight for Heavy Marine Duty
Grade 70 Transport	Grade 70 Heat-Treated Carbon	Yellow Chromate / Gold Zinc	Flatbed Cargo Securement, DOT Tie-Downs	High Strength Weight Ratio & DOT Approved

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Model Naming & Series Documentation

Example Designation: SWR-CSC-0375-G70-YEL-DRUM
SWR: Brand / Supplier Identifier (Southwest Wire Rope)
CSC: Product Category (Carbon Steel Chain)
0375: Nominal Chain Size (0.375 in / 3/8 in)
G70: Chain Grade (Grade 30 G30 / Grade 43 G43 / Grade 70 G70)
YEL: Finish Type (Yellow Chromate YEL / Hot-Dip Galvanized HDG / Zinc Plated ZNC / Self-Colored SC)
DRUM: Packaging Unit (Full Drum DRUM / Half Drum HDRM / Cut Length CFT)

Grade 30 Proof Coil Chain
- Size Range: 3/16 in – 1 in (5 mm – 25 mm)
- Material: Low Carbon Steel
- Finishes: Hot-Dip Galvanized (HDG), Zinc Plated, Self-Colored
- Primary Feature: Economical standard-pitch chain designed for general utility, light marine moorings, playground equipment, guard rails, and light tie-down applications (Not for overhead lifting)
- Compliance: NACM Standards
Grade 43 High Test Chain
- Size Range: 1/4 in – 3/4 in (6.4 mm – 20 mm)
- Material: Higher Carbon Steel
- Finishes: Hot-Dip Galvanized (HDG), Self-Colored
- Primary Feature: Higher strength-to-weight ratio than Grade 30, preferred for barge deck lashing, marine container tie-downs, logging, and heavy-duty industrial towing (Not for overhead lifting)
- Compliance: NACM / ASTM A413
Grade 70 Transport Chain
- Size Range: 1/4 in – 5/8 in (6.4 mm – 16 mm)
- Material: Heat-Treated Carbon Steel
- Finishes: Yellow Chromate / Gold Zinc Plated (for fast visual DOT identification)
- Primary Feature: High-strength transport chain approved by DOT for highway cargo tie-downs, heavy equipment transport, and binding applications (Not for overhead lifting)
- Compliance: NACM / DOT Specifications