Customized Forging Services For Mining Chain Rings, Forged Steel
Parts, And Forged Chains
Product Overview
We specialize in precision forging of mining chain rings, forged
steel parts, and heavy-duty chains designed to withstand extreme
abrasion, impact, and tensile loads in mining operations. Our
forged components are engineered for maximum durability, fatigue
resistance, and operational safety in underground and surface
mining environments.
Key Features & Benefits
✅ Superior Material Strength
- Alloys: 4140, 4340, 42CrMo4, and custom high-wear steels
- Tensile Strength: 850–1,200 MPa (heat-treated)
- Impact Toughness: 40–60 J/cm² at -20°C (Charpy V-notch tested)
✅ Advanced Forging Technology
- Closed-Die Forging: Optimized grain flow for 30% higher fatigue
life vs. cast parts
- Precision Machining: Post-forging CNC machining (±0.05mm
tolerances)
- Non-Destructive Testing (NDT): Ultrasonic, magnetic particle, and
dye penetrant inspection
✅ Enhanced Wear & Corrosion Resistance
- Surface Treatments:
- Induction hardening (HRC 55-60 on wear surfaces)
- QPQ salt bath nitriding for corrosion protection
- Tungsten carbide overlay for extreme abrasion zones
✅ Customization Capabilities
- Chain Rings: DIN 764, DIN 766, or OEM-spec designs
- Forged Chains: Round link, stud link, and elevator chains
- Special Features:
- Integral sprocket teeth for direct drive systems
- Laser-marked traceability codes
Applications
Mining Chains: Drag chains, conveyor chains, scraper chains
Lifting & Hoisting: Shackles, hooks, and load rings
Processing Equipment: Crusher parts, mill liners, and slurry pump
components
Technical Specifications: Custom Forged Mining Components
| Parameter | Chain Rings | Forged Chains | Custom Forged Parts |
|---|
| Material Standards | DIN 17200/EN 10083 | DIN 5685/ISO 1834 | ASTM A668/AISI 4140+ |
| Dimensions | Ø100-600mm x 20-150mm thick | 10-50mm diameter x any length | Max 500kg single piece |
| Tensile Strength | 850-1200 MPa (HT) | 800-1100 MPa (HT) | 900-1400 MPa (custom HT) |
| Hardness | Core: 28-32 HRC | Core: 26-30 HRC | Core: Custom |
| Surface: 55-60 HRC (IH)* | Surface: 50-55 HRC (IH) | Surface: Up to 62 HRC |
| Impact Toughness | 40J @ -20°C | 35J @ -20°C | 45J+ @ -40°C (low-temp) |
| Load Capacity | 5:1 safety factor | 4:1 safety factor | Designed to DIN 15435 |
| Dimensional Tolerance | ±0.3% of OD | ±0.2mm pitch accuracy | ±0.05mm (machined) |
| Surface Treatment | QPQ/Tungsten overlay | Shot peened + oil coating | Custom zone hardening |
| Testing | UT+MPI+macroetch | Proof load + fatigue test | 3D scanning + FEA report |
| Certifications | MSHA, ISO 9001 | DNV/ABS class approved | CE/PED 2014/68/EU |
FAQ
1. Why choose forged over cast/welded mining components?
3x Longer Service Life: Directional grain flow resists crack
propagation
Higher Safety Factors: No porosity defects (critical for
load-bearing parts)
Proven in Extreme Conditions: Withstand 50% more impact energy than
cast equivalents
2. How do I select the right alloy for my mining application?
| Condition | Recommended Alloy | Key Advantage |
|---|
| High abrasion (iron ore) | 42CrMo4 + tungsten overlay | 60HRC wear surfaces |
| Sub-zero temperatures | 4340 Mod (-60°C rated) | Maintains 40J impact at -40°C |
| Acidic slurry environments | 20MnCr5 + QPQ | Corrosion resistance + 850MPa TS |
3. What certifications do your forged chains carry?
Mandatory: MSHA 30 CFR Part 7 (US underground mining)
Global: CE/PED 2014/68/EU, DNVGL-ST-0378 (offshore)
OEM-Specific: Meet Komatsu/Joy Global procurement specs
4. Can you replicate our existing chain ring design?
Yes, we offer:
Reverse Engineering: Provide 1 worn sample for 3D scanning
Legacy Tooling: Utilize your existing die designs (modify for
improved life)
Performance Upgrades: Suggest material/heat treatment improvements
