Grade 70 chain
Grade 70 Chain
Product Overview
The Grade 70 chain, also known as transport chain or trucker's chain, is a premium high-strength alloy steel chain engineered specifically for heavy-duty load securement applications. Manufactured to exceed rigorous industry standards such as NACM/WELDCO and DOT specifications, our Grade 70 chain features a distinctive gold-colored zinc dichromate plating that provides superior corrosion resistance while ensuring easy visual identification on job sites.
Designed for securing cargo during transportation, this chain offers exceptional working load limits (WLL) that make it indispensable for logistics professionals, fleet operators, and rigging experts worldwide. Unlike lower-grade chains, Grade 70 chain is heat-treated for maximum tensile strength, delivering reliable performance under dynamic loads and extreme conditions. Available in a range of sizes from 1/4 inch to 5/8 inch, it is the go-to choice for flatbed trucking, intermodal shipping, and construction hauling, where safety and efficiency are paramount.
Our Grade 70 chain undergoes stringent quality control, including proof testing and dimensional inspections, to guarantee consistency batch after batch. Whether you're binding down machinery, lumber, steel coils, or oversized equipment, this chain provides the robust holding power needed to prevent shifts and ensure compliance with federal tie-down regulations.
Key Features
- High-Strength Alloy Steel Construction: Heat-treated for ultimate tensile strength up to 200,000 psi, far surpassing Grade 43 or Grade 80 chains in load securement scenarios.
- Gold Zinc Dichromate Finish: Provides excellent rust and corrosion resistance, ideal for outdoor exposure and harsh weather conditions common in international shipping.
- Optimized Link Design: Oblong-shaped links with precise welding ensure smooth engagement with binders, hooks, and winches, reducing wear and enhancing durability.
- DOT and NACM Compliant: Meets or exceeds U.S. Department of Transportation requirements and National Association of Chain Manufacturers standards for transport chain applications.
- Color-Coded for Safety: Distinct yellow/gold plating allows for quick grade identification, minimizing the risk of using incorrect chain types on-site.
- Available in Full Drums: Supplied in continuous lengths up to 600 feet per drum for cost-effective, tangle-free deployment in high-volume operations.
- Versatile Size Range: From lightweight 1/4-inch for smaller loads to heavy-duty 5/8-inch for maximum securement capacities.
Technical Specifications
| Trade Size (in) | Material Diameter (in) | Working Load Limit (lbs) | Proof Test (lbs) | Minimum Breaking Force (lbs) | Max Length per Link (in) | Weight per 100 ft (lbs) |
|---|---|---|---|---|---|---|
| 1/4 | 0.276 | 3,500 | 7,000 | 14,000 | 1.24 | 24 |
| 5/16 | 0.343 | 5,700 | 11,400 | 22,800 | 1.53 | 37 |
| 3/8 | 0.394 | 8,100 | 16,200 | 32,400 | 1.77 | 54 |
| 7/16 | 0.461 | 11,200 | 22,400 | 44,800 | 2.06 | 70 |
| 1/2 | 0.531 | 15,000 | 30,000 | 60,000 | 2.38 | 92 |
| 5/8 | 0.630 | 22,200 | 44,400 | 88,800 | 2.76 | 132 |
Note: Specifications are nominal and subject to manufacturing tolerances. Always refer to the latest NACM standards for precise application guidelines. Do not exceed 50% of minimum breaking force in use.
Application Scenarios
The versatility of Grade 70 chain makes it suitable for a wide array of demanding environments. In the trucking industry, it excels at securing flatbed loads such as construction materials, heavy machinery, and pipe, preventing dangerous cargo shifts during highway transit. Logistics and freight companies rely on it for intermodal container tie-downs, where its high WLL handles the rigors of rail-to-road transfers.
Construction sites benefit from Grade 70 chain in hoisting and binding applications, including temporary rigging for scaffolding and equipment transport. Oil and gas operations use it to secure pipelines and drilling components across rugged terrains. For agricultural hauling, it provides reliable restraint for hay bales, tractors, and livestock trailers. Internationally, exporters in manufacturing hubs like China and Europe specify Grade 70 chain for overseas shipments, ensuring compliance with global safety norms like EN 12195-3 for load securing.
Its corrosion-resistant plating extends usability in marine-adjacent environments, such as portside loading, while the chain's strength supports overhead lifting when paired with appropriate grade 70 fittings—though primary use remains horizontal securement.
Advantages
Opting for our Grade 70 chain delivers tangible benefits over standard carbon steel or lower-grade alternatives. Its superior tensile strength—up to 20% higher than Grade 43—allows fewer chains per load, reducing equipment costs and setup time. The zinc dichromate coating extends service life by 3-5 times in corrosive atmospheres compared to painted chains, minimizing replacements and downtime.
Precision manufacturing ensures uniform link elongation under load, preventing premature failure and enhancing worker safety. Independent testing verifies every batch meets or exceeds published breaking forces, providing peace of mind for liability-conscious operations. Economically, bulk drum packaging lowers per-foot pricing, ideal for high-volume B2B buyers.
In performance trials, Grade 70 chain demonstrates 15-20% better fatigue resistance in cyclic loading, crucial for long-haul trucking. Its non-marring surface protects valuable cargo like vehicles and electronics, while compatibility with synthetic binders and hooks streamlines workflows. Overall, it represents the optimal balance of strength, durability, and value for professional load securement.
Why Choose Us
As a leading supplier of industrial chains, we specialize in premium Grade 70 chain sourced from ISO-certified mills with decades of expertise in alloy steel production. Our rigorous quality assurance includes ultrasonic weld testing, dimensional verification, and third-party certifications like ABS and Lloyd's Register for international trade.
We offer consistent availability in standard and custom lengths, backed by global warehousing to support just-in-time delivery for your supply chain needs. Our technical support team provides application guidance, load calculation tools, and compatibility advice to optimize your operations. Committed to sustainability, our chains are produced with low-carbon processes, and we prioritize recyclable packaging.
With a proven track record serving Fortune 500 logistics firms, construction conglomerates, and export traders, we deliver unwavering reliability. Every coil of our Grade 70 chain is traceable, ensuring full accountability from forge to field.
FAQ
What is the primary use of Grade 70 chain?
Grade 70 chain is primarily designed for load securement in transportation, such as trucking and cargo binding. It is not rated for overhead lifting unless specified with compatible components.
How does Grade 70 chain differ from Grade 80 or Grade 100?
While all are high-strength, Grade 70 is optimized for horizontal tie-downs with a focus on transport compliance and corrosion resistance. Grade 80 and 100 offer higher WLL for lifting but lack the gold plating for easy identification.
Is Grade 70 chain suitable for saltwater environments?
The zinc dichromate plating offers good corrosion resistance, but for prolonged marine exposure, consider electro-galvanized or stainless alternatives. Regular inspection is recommended.
What is the safe working load limit for Grade 70 chain?
WLL varies by size, from 3,500 lbs for 1/4-inch to 22,200 lbs for 5/8-inch. Never exceed 50% of the minimum breaking force, and use in straight pulls only.
Does your Grade 70 chain come with certifications?
Yes, all batches comply with NACM/WELDCO, DOT FMCSA standards, and include mill test certificates upon request for traceability.
Can I cut Grade 70 chain to custom lengths?
Yes, we provide cut-to-length services with swaged ends or hooks. Contact us for bulk custom orders to maintain chain integrity.
What maintenance is required for Grade 70 chain?
Inspect for wear, nicks, or elongation before each use. Clean with mild soap, lubricate links periodically, and store in a dry environment to preserve the plating.