Lifting chains and hooks

Core Product Range

Alloy Steel Lifting Chains

• Grades: Manufactured to G80 (Grade 8) and G100 (Grade 10) alloy steel standards, providing superior strength-to-weight ratios and exceptional durability.

• Types: Available in various configurations including:

  • Single Leg Chains
  • Double Leg (2-Leg) Chains
  • Triple Leg (3-Leg) Chains
  • Quad Leg (4-Leg) Chains
  • Endless Loops
  • Custom Lengths & Assemblies

• Features: Precision welded links, uniform heat treatment ensuring consistent strength, smooth surface finish to minimize wear on sheaves and blocks, clear grade markings for traceability.

Lifting Hooks & Assemblies

• Hook Types: Wide selection including:

  • Clevis Hooks (Shackle Hooks): For direct sling or shackle connection.
  • Eye Hooks: For connection via a pin or shackle.
  • Self-Locking Hooks: Featuring robust safety latches to prevent accidental disengagement.
  • Non-Locking Hooks: For controlled environments.
  • Foundry Hooks: Heat-resistant hooks for demanding environments.
  • Specialty Hooks: Designed for specific applications (e.g., grab hooks, sorting hooks).

• Master Links & Couplings: Essential components for connecting multiple legs of chain slings or attaching hooks to machinery.

• Shackles: Available in anchor, chain, and D-shackle types (though often categorized separately, frequently paired with chains and hooks).

Technical Parameters Summary Table

Component	Key Parameter	Typical Range / Specification	Standard Reference
Chain (G80)	Diameter (d)	6mm – 26mm (Custom available)	ISO 4778, EN 818-4
	WLL	0.25t – 25t+ (Depends on d)
	Min. Break Load (MBL)	4 x WLL
	Proof Load	2 x WLL
	Material	Alloy Steel (e.g., 20Mn2, 23MnCrMo5-2)
Chain (G100)	Diameter (d)	6mm – 26mm (Custom available)	ISO 4778, EN 818-4
	WLL	Higher than G80 for same d (e.g., 10mm ~4.0t)
	Min. Break Load (MBL)	5 x WLL
	Proof Load	2 x WLL
	Material	Higher Grade Alloy Steel
Hooks (Gr 8)	WLL Range	0.25t – 50t+	ISO 7592, EN 1677-1
	Min. Break Load (MBL)	5 x WLL
	Proof Load	2 x WLL
	Min. Yield Strength	640 N/mm²
	Throat Opening (S)	Controlled per WLL & Type
	Material	Forged Alloy Steel (e.g., 34CrMo4, 30CrNiMo8)
All	Traceability Marking	WLL, Grade, Manufacturer ID, Batch/Serial	All Standards
	Corrosion Protection (Opt.)	Hot-Dip Galvanizing (HDG) to ISO 1461

Core Product Range & Technical Specifications

Alloy Steel Lifting Chains (G80 / Grade 8 & G100 / Grade 10)

• Chain Grades: G80 (Minimum Break Load = 800 N/mm²), G100 (Minimum Break Load = 1000 N/mm²)

• Chain Diameters (d): Typically ranging from 6mm (1/4″) to 26mm (1″) (Custom diameters available).

• Working Load Limit (WLL): Directly proportional to chain diameter and grade. Example ranges:

  • 6mm G80 Chain: Approx. WLL 1.0 tonne
  • 10mm G80 Chain: Approx. WLL 3.2 tonnes
  • 13mm G80 Chain: Approx. WLL 5.3 tonnes
  • 16mm G80 Chain: Approx. WLL 8.0 tonnes
  • 10mm G100 Chain: Approx. WLL 4.0 tonnes
  • (WLLs are rigorously tested and marked on each chain; always refer to markings)

• Proof Test Load: Typically 2x WLL (Per ISO 4778 / EN 818-4).

• Break Test Load: Minimum 4x WLL for G80, 5x WLL for G100 (Destructive testing on samples).

• Elongation at Break: ≤ 15% (Measured over 3 links).

• Tolerance: Link dimensions manufactured to tight tolerances as per ISO 4778.

• Surface: Smooth finish, optionally galvanized (Min. average coating weight: 610 g/m² for Grade A) or painted for corrosion protection.

Lifting Hooks & Assemblies

• Hook Grades: Manufactured to Grade 4, 5, 6, 8 (Equivalent to ISO 7592 / EN 1677-1). Grade 8 (Most Common, Min. Yield Strength = 640 N/mm²) is standard for heavy-duty use.

• Working Load Limit (WLL): Ranges from 0.25 tonnes to 50+ tonnes, depending on hook type, size, and design.

• Proof Test Load: Typically 2x WLL.

• Break Test Load: Minimum 3x WLL for Grade 4, 4x WLL for Grade 5, 5x WLL for Grade 6/8.

• Hook Throat Opening (S): Precisely controlled according to WLL and standard dimensions (e.g., EN 1677-1).

• Shank Diameter/Width: Sized according to WLL and connection type (e.g., eye diameter, clevis pin hole).

• Latch Types: Forged safety latches on self-locking hooks, designed to withstand impact and prevent accidental release. Latch engagement tested.

• Material: High-tensile alloy steel (e.g., 34CrMo4, 30CrNiMo8), forged and heat-treated.

• Surface: Shot blasted, optionally galvanized or painted.

Key Features & Benefits of Weihua Lifting Chains and Hooks

• Uncompromising Strength & Durability: Forged or fabricated from high-grade alloy steel, rigorously heat-treated to achieve specified tensile strengths (G80/G100). Resistant to deformation, abrasion, and fatigue.

• Enhanced Safety: Designed and manufactured in strict compliance with international safety standards (ISO 4778, ISO 7592, ASME B30.9, EN 818-4, etc.). Critical for protecting personnel and loads.

• Precision Manufacturing: State-of-the-art production processes ensure consistent link dimensions, smooth surfaces, and reliable weld integrity. This minimizes internal stress points and wear.

• Rigorous Quality Control: Every batch undergoes stringent testing, including:

  • Proof Load Testing
  • Break Load Testing (destructive on samples)
  • Dimensional Checks
  • Visual Inspection
  • Non-Destructive Testing (NDT) like Magnetic Particle Inspection (MPI) as required.

• Traceability: Each chain and hook is clearly marked with its Working Load Limit (WLL), grade (e.g., G80), manufacturer ID (Weihua), and often a unique serial/batch number for full traceability.

• Versatility: Suitable for a vast array of applications across industries, from general manufacturing and warehousing to construction, mining, shipbuilding, and heavy machinery.

• Customization: Weihua can provide custom chain lengths, specific hook configurations, and unique assemblies to meet specialized lifting requirements.

• Corrosion Resistance: Standard finish protects against general environments. Optional galvanization or specialized coatings available for harsh/corrosive conditions.

Lifting Chains And Hooks Applications

Weihua lifting chains and hooks are integral components in:

• Overhead Crane Systems (Crane Hook And Block)
• Chain Hoists (Manual & Electric)
• Lever Hoists (Come-alongs)
• Chain Slings (Assembly Kits)
• Rigging Applications
• Material Handling Equipment Integration
• Construction Sites
• Mining Operations
• Manufacturing Assembly Lines
• Shipyards & Docks

Certifications & Compliance

Weihua lifting chains and hooks are manufactured to meet or exceed:

• ISO 4778 (Specification for short link chain for lifting purposes)
• ISO 7592 (Forged steel lifting hooks – Grade 4, 5, 6, 8)
• ASME B30.9 (Slings) / B30.10 (Hooks)
• EN 818-4 (Short link chain for lifting – Grade 8)
• EN 1677-1 (Components for slings – Safety – Part 1: Forged steel components, Grade 8)
• CE Marking (where applicable)
• Other national and regional standards upon request.

Why Choose Weihua Lifting Chains and Hooks?

• Global Reputation: Backed by Weihua’s decades of experience and leadership in lifting equipment.

• Proven Reliability: Trusted by industries worldwide for critical lifting operations.

• Safety First: Engineered and tested to the highest safety standards.

• Quality Assurance: Robust manufacturing and quality control processes guarantee performance.

• Comprehensive Range: One-stop solution for diverse chain and hook requirements.

• Technical Support: Expert guidance available for selection and application.

Weihua’s lifting chains and hooks represent the pinnacle of strength, reliability, and safety in load connection technology. Whether you need standard components or custom-engineered solutions, Weihua provides the dependable link you can trust for efficient and secure lifting operations. Invest in Weihua quality for peace of mind and optimal performance.