Description
Technical Parameters
Low-Temperature Embrittlement Protection & Adaptation
| Model No. | Low-Temperature Operating Range (℃) | Brittleness Transition Temperature (℃) | Anti-Embrittlement Treatment | Impact Toughness at -50℃ (J/cm²) | Cold-Heat Cycle Resistance (Cycles) | Frost Resistance Grade | Low-Temp Installation Adaptability | Core Low-Temp Advantage |
|---|---|---|---|---|---|---|---|---|
| SKL-LT12 | -40 ~ +60 | ≤-55 | Low-temperature tempering + Ni alloying | ≥55 | 1500 | F5 | Manual tools; no pre-heating required | Cost-effective for temperate cold regions |
| SKL-LT14 | -50 ~ +70 | ≤-65 | Vacuum heat treatment + Mo addition | ≥70 | 2000 | F6 | Pneumatic tools; low-temperature lubricant | High toughness for frigid continental regions |
| SKL-LT21 | -60 ~ +80 | ≤-75 | Cryogenic treatment + grain refinement | ≥85 | 2500 | F7 | Hydraulic tools; pre-installation thermal insulation | Extreme cold resistance for polar/high-altitude rail |
| SKL-LT15 | -45 ~ +75 | ≤-60 | Controlled atmosphere quenching + Cr-Mn alloying | ≥65 | 1800 | F6 | Electric tools; frost-proof coating | Balanced performance for alpine mixed regions |
| SKL-LT3 | -35 ~ +65 | ≤-50 | Conventional low-temp annealing | ≥50 | 1200 | F4 | Universal tools; easy cold-region maintenance | Economical for mild cold branch lines |
Lightweight Design & Material Density Optimization
| Model No. | Material Density (g/cm³) | Weight Reduction Rate (vs Standard Model, %) | Lightweight Structural Design | Tensile Strength Retention Rate (%) | Stiffness Maintenance (kN/mm) | Lightweight Material Type | Application Scenario for Lightweight Demand | Core Lightweight Advantage |
|---|---|---|---|---|---|---|---|---|
| SKL-LW12 | 7.6 | 12 | Hollow shank + thin-walled structure | 95 | 28-32 | Low-alloy high-strength steel | Light rail/branch lines (weight-sensitive sleepers) | Cost-effective lightweight; no performance loss |
| SKL-LW14 | 7.4 | 18 | Lattice structure at non-stress areas + forged hollow head | 92 | 30-34 | Ti-steel composite alloy | Heavy-haul auxiliary lines (reduced track load) | High load-bearing with significant weight cut |
| SKL-LW21 | 7.2 | 25 | Carbon fiber reinforced polymer (CFRP) core + steel cladding | 98 | 25-29 | CFRP-steel hybrid | High-speed rail (energy-saving + reduced wear) | Ultra-lightweight; enhanced fatigue resistance |
| SKL-LW15 | 7.3 | 20 | Optimized material distribution + hollow tip | 94 | 32-36 | Medium-density alloy steel | Urban subway (reduced vehicle-track interaction) | Lightweight + noise reduction; suitable for dense traffic |
| SKL-LW3 | 7.5 | 10 | Thickness reduction at stress-free zones | 96 | 26-30 | High-purity low-density steel | Regional passenger lines (cost-sensitive lightweight demand) | Minimal weight cut; maximum reliability |
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