Qingdao Sande Technology Co., LTD
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X458 Forged Steel Chains - Professional Manufacturer Of Mining & Trolley Chains
Product Overview
As a leading manufacturer of industrial forged chains, our X458 Series delivers superior strength, wear resistance, and durability for demanding mining and trolley applications. Precision-forged from alloy steel and optimized through advanced heat treatment, these chains outperform standard welded chains in service life, safety, and total cost of ownership.
Key Features & Benefits
✅ Premium Material & Construction
Forged Alloy Steel: 42CrMo4 / 20MnCr5 (Custom Grades Available)
Tensile Strength: 800–1,200 MPa (Heat-Treated)
Fatigue Life: 3x Longer Than Welded Chains (ISO 1834 Certified)
✅ Precision Manufacturing
Closed-Die Forging: Optimized Grain Flow for Maximum Impact Resistance
Dimensional Accuracy: ±0.2mm Pitch Tolerance (DIN 5685 Standard)
Surface Hardness: HRC 50–55 (Induction Hardened Wear Surfaces)
✅ Enhanced Durability
Abrasion Resistance: Tungsten Carbide Overlay Option for Mining
Corrosion Protection: QPQ Nitriding / Hot-Dip Galvanizing
Temperature Range: -40°C to +200°C
✅ Customization Options
Attachments: Forks, Hooks, or Custom Links for Trolley Systems
Surface Treatments: Black Oxide, Powder Coating, or Laser Marking
Certifications: MSHA, CE, DNV, or OEM-Specific Standards
Applications
Mining: Drag Chains, Scraper Chains, Conveyor Systems
Trolley Systems: Overhead Cranes, Assembly Lines, Material Handling
Heavy Industry: Steel Plants, Cement Mills, Port Equipment
X458 Forged Chain Technical Specifications
| Parameter | Mining Chain Series | Trolley Chain Series | Custom OEM Options |
|---|---|---|---|
| Material Standard | DIN 17200/EN 10083-1 | DIN 5685/ISO 1834 | ASTM A391/AISI 4140+ |
| Chain Diameter | 14-50mm (±0.3%) | 10-32mm (±0.2%) | 8-60mm (±0.15%) |
| Pitch Length | 3-12×D (D=chain diameter) | 2-8×D | Custom pitch configurations |
| Tensile Strength | 800-1200 MPa (HT) | 700-1100 MPa (HT) | Up to 1400 MPa (Maraging) |
| Proof Load | 2×WLL* | 2.5×WLL | 3-4×WLL (safety critical) |
| Surface Hardness | 50-55 HRC (core) | 45-50 HRC (core) | Custom zone hardening |
| 55-60 HRC (wear faces) | 50-55 HRC (contact areas) | ||
| Impact Toughness | 35J @ -20°C | 40J @ 0°C | 30J @ -60°C (arctic grade) |
| Temperature Range | -40°C to +250°C | -30°C to +150°C | -60°C to +400°C (special) |
| Wear Resistance | 300% vs. DIN 764 standard | 250% vs. ISO 1834 | Tungsten carbide overlay |
| Corrosion Protection | QPQ nitriding (30μm) | Zinc-nickel plating (15μm) | HVOF coating available |
| Testing Standards | ISO 15654 (fatigue) | DIN 685 (dynamic) | Customer-specified protocols |
| Certifications | MSHA, ATEX | CE, OSHA | DNV, ABS, Lloyd's Regi |
FAQ
1. Why choose forged chains over welded/rolled alternatives?
3× Longer Service Life: Directional grain flow resists crack propagation
Higher Safety Factors: No weld seams (common failure points in drag chains)
Proven in Mining: Withstand 50% more impact energy than DIN 764 standard
2. What makes the X458 series suitable for extreme conditions?
| Feature | Mining Benefit | Trolley Benefit |
|---|---|---|
| Material | 42CrMo4 alloy (850-1200MPa TS) | 20MnCr5 (optimized for fatigue) |
| Surface Treatment | QPQ nitriding (30μm) | Zinc-nickel plating (15μm) |
| Temperature Range | -40°C to +250°C | -30°C to +150°C |
3. Can you match our existing chain specifications?
Yes, we replicate:
Dimensions: Provide samples or drawings for 1:1 reproduction
Performance: Reverse-engineer failed chains to improve lifespan
Certifications: Meet MSHA, CE, DNV, or OEM-specific standards
4. How do your lead times compare to industry standards?
Standard Orders: 8-10 weeks (including heat treatment & testing)
Emergency Production: 4-6 weeks (+20% fee, uses reserved billet stock)
5. Do you offer wear-resistant upgrades?
Standard: Induction-hardened wear faces (55-60 HRC)
Premium: Tungsten carbide overlay (+400% abrasion resistance)
Custom: Hardfacing patterns for specific contact zones
6. What's your production capacity?
Monthly Output: 500+ metric tons
Max Single Piece: 150kg (hammer forged)
Tooling Capability: 60+ die sets for quick changeovers