Description
Technical Parameters
Railway SKL Clips - Model Classification & Track System Compatibility
| SKL Model | Wire Diameter (mm) | Applicable Track Type | Compatible Rail (kg/m) | Key Dimensions (mm) | Matching Fastener Components | Installation Torque (N·m) | Theoretical Weight (g/pc) |
|---|---|---|---|---|---|---|---|
| SKL 1 | 13 | Regional Passenger Railways | 43, 50 (UIC 54) | Height: 38; Opening Width: 18; Leg Thickness: 5.2 | Base plate (Q235); Rail pad (EPDM, 8mm) | 35–45 | 480 |
| SKL 3 | 13 | Heavy-Haul Freight Railways | 60 (UIC 60), 75 | Height: 42; Opening Width: 20; Leg Thickness: 5.5 | Heavy-duty base plate (Q345); Shock-absorbing pad (SBR, 10mm) | 45–55 | 490 |
| SKL 12 | 14 | Urban Metro (Main Line) | 50, 60 (GB Standard) | Height: 40; Opening Width: 19; Leg Thickness: 5.8 | Insulated base plate (PA66+GF30); Insulator (ceramic, 5mm) | 40–50 | 530 |
| SKL 14 | 14 | High-Speed Rail (250–300km/h) | 60 (UIC 60), CRH Rail | Height: 45; Opening Width: 21; Leg Thickness: 6.0 | Precision base plate (Q355B); High-elastic pad (silicone, 6mm) | 50–60 | 580 |
| SKL 24 | 12 | Mining Railways | 30, 43 (Heavy-Duty) | Height: 35; Opening Width: 17; Leg Thickness: 4.8 | Anti-corrosion base plate (hot-dip galvanized); Wear-resistant pad (nylon, 7mm) | 30–40 | 420 |
Railway SKL Clips - Material Process & Performance Verification
| Material Grade | Chemical Composition (Key Elements, Wt. %) | Manufacturing Process | Surface Treatment | Performance Test Item | Test Standard | Acceptance Criterion |
|---|---|---|---|---|---|---|
| 60Si2MnA | C: 0.56-0.64; Si: 1.50-2.00; Mn: 0.60-0.90 | Wire drawing → Cold bending → Quenching (860-880℃) + Tempering (420-440℃) | Hot-dip galvanizing (≥80μm) | 1. Elastic Deformation; 2. Fatigue Life | GB/T 1222; GB/T 3075 | 1. Permanent deformation ≤0.5mm (5000 cycles); 2. Fatigue life ≥10⁷ cycles |
| 55SiMnMo | C: 0.52-0.60; Si: 0.60-0.90; Mn: 1.00-1.30; Mo: 0.15-0.25 | Hot forging → Shaping → Quenching (850-870℃) + Tempering (400-420℃) | Dacromet coating (≥12μm) | 1. Tensile Strength; 2. Corrosion Resistance | DIN 17221; ISO 9227 | 1. Tensile strength ≥1450MPa; 2. Salt spray ≥600h (no red rust) |
| AISI 9260 | C: 0.56-0.64; Si: 1.80-2.20; Mn: 0.70-1.00 | Precision cold rolling → CNC bending → Stress relieving (380-400℃) | Zinc-nickel plating (10-12μm) | 1. Hardness; 2. Impact Toughness | ASTM A913; ASTM E23 | 1. Hardness HRC 46-51; 2. Impact toughness ≥55J (-20℃) |
| SUP9 | C: 0.56-0.64; Si: 1.50-2.00; Mn: 0.60-0.90 | Wire drawing → Heat treatment → Bending → Shot peening | Black oxide + oil coating | 1. Surface Roughness; 2. Dimensional Tolerance | JIS G4801; JIS B0601 | 1. Surface roughness Ra ≤3.2μm; 2. Dimension deviation ±0.3mm |
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