What is the weight per meter of Profile S18 rail?
The standard nominal weight per meter of the Profile S18 rail is exactly 18.30 kilograms per linear meter. This uniform weight-per-meter metric of the Light Rail S18 ensures that the tracking structure can successfully support light-to-medium industrial rolling stock without suffering from premature downward deflection.
The precise distribution of mass across its 93.00 mm height and 82.00 mm base width guarantees that vertical pressures from industrial mine cars or light overhead hoists are dispersed smoothly across the entire infrastructure alignment. Every linear meter is rolled under automated inspection setups to guarantee that no internal density variances or profile deviations threaten the calculated weight consistency during extended service lifetimes.
Weight advantage of DIN S18 Rail
The DIN S18 rail is a European standard light rail profile designated under the DIN 5901 standard. Its key weight advantage stems directly from its structural efficiency, optimizing the ratio between dead weight and load-bearing capacity for light-duty industrial applications.
1. Optimized Material Efficiency for Light Loads
The S18 profile delivers an exact nominal mass of 18.30 kg/m, making it significantly lighter than standard heavy track profiles or crane rails. For light volume transport, field tracks, and underground mining operations, using a heavier profile (such as S24 or S30) introduces unnecessary material cost and dead weight without providing functional structural advantages.
2. Reduced Structural Loading in Elevated Systems
In overhead crane runways, material handling gantries, or automated warehouse storage and retrieval systems (ASRS), the self-weight of the rail acts as a continuous dead load on the supporting steel girders or concrete columns. The low linear mass of the S18 rail lowers the total dead load calculation, allowing for lighter, more cost-effective supporting infrastructure design.
3. Lower Logistics and Installation Costs
The lower weight per meter directly impacts supply chain and on-site handling metrics:
Freight Volume: More linear meters of rail can be transported per shipment under standard truck or container weight limits.
Manual Handling: At 18.30 kg/m, standard length segments can be positioned and aligned with lighter equipment or manual labor in confined spaces like tunnels or mines, accelerating installation timelines.
Dimensional Comparison
The following table demonstrates how the S18 profile limits cross-sectional mass compared to slightly heavier alternatives in the same standard class, minimizing steel consumption while retaining essential geometry.
| Rail Profile | Weight (kg/m) | Height (mm) | Base Width (mm) | Head Width (mm) | Web Thickness (mm) |
| DIN S14 | 14.00 | 80.0 | 70.0 | 38.0 | 9.0 |
| DIN S18 | 18.30 | 93.0 | 82.0 | 43.0 | 10.0 |
| DIN S20 | 19.80 | 100.0 | 82.0 | 44.0 | 10.0 |
| DIN S24 | 24.43 | 115.0 | 90.0 | 53.0 | 10.0 |
What is the maximum allowable axle load of DIN S18 Rail?
The maximum allowable axle load of the DIN S18 rail (18.30 kg/m) is typically rated between 3.5 to 5.0 metric tons per axle for standard narrow-gauge and industrial light track applications operating at low speeds (under 25 km/h).
In static, specialized lifting environments like automated warehouse systems (ASRS) or light workshop cranes, the maximum structural wheel load can be calculated based on the supporting track base, but the safe operational capacity relies on several variables.
Variable Factors Affecting Real-World Load Capacity
1. Sleeper/Support Spacing
The continuous load-bearing capacity of an 18.30 kg/m profile depends heavily on structural deflection.
- Narrow Spacing: Spacing sleepers or support brackets at 500 mm to 600 mm intervals maximizes stability, allowing the system to safely reach the upper threshold of 5.0 tons per axle.
- Wide Spacing: Spacing exceeding 750 mm limits the allowable axle load to 3.5 tons or less to prevent vertical deformation and accelerated web wear under load.
2.Operational Velocity (Dynamic Loading Factor)
Dynamic impact forces amplify the stress placed on the rail head:
- Low-speed logistics (< 10 km/h): Minimal dynamic impact allows the rail to handle full capacity.
- Higher speeds (15–25 km/h): Requires a down-rating of the maximum allowable axle load by 15% to 20% to compensate for localized impact stress at rail joints.
3.Steel Grade Selection
The choice of material composition alters the yield strength under concentrated rolling loads:
- Standard Grades (e.g., R200): Suitable for standard light transport and lower load thresholds.
| EN 13674-4: R200 Steel Grade Specifications | ||
| Property Category | Parameter / Element | Value / Requirement (EN 13674-4) |
| Chemical Composition (%) | Carbon (C) | 0.40 – 0.60 |
| Manganese (Mn) | 0.60 – 1.20 | |
| Silicon (Si) | 0.15 – 0.40 | |
| Phosphorus (P) | ≤ 0.035 | |
| Sulfur (S) | ≤ 0.035 | |
| Mechanical Properties | Tensile Strength (Rm) | ≥ 680 MPa |
| Elongation (A) | ≥ 14% | |
| Running Surface Hardness | ≥ 200 HBW | |
- High-Wear Grades (e.g., R260): Features a tensile strength of ≥ 880 MPa and higher surface hardness (260–300 HBW). This provides much higher resistance against plastic deformation under maximum wheel loads.
| EN 13674-4: R260 Steel Grade Specifications | ||
| Chemical Composition (%) | Carbon (C) | 0.62 – 0.80 |
| Manganese (Mn) | 0.70 – 1.20 | |
| Silicon (Si) | 0.15 – 0.58 | |
| Phosphorus (P) | ≤ 0.025 | |
| Sulfur (S) | ≤ 0.025 | |
| Chromium (Cr) | ≤ 0.15 | |
| Mechanical Properties | Tensile Strength (Rm | ≥ 880 MPa |
| Elongation (A) | ≥ 10% | |
| Running Surface Hardness | 260 – 300HBW | |
Frequently Asked Questions
- What makes the weight of the European S18 Light Rail ideal for underground mines?
The nominal weight of 18.30 kg/m offers an excellent balance between structural rigidity and manual handling. It allows mining crews to quickly pick up and extend track loops inside narrow mine corridors without requiring heavy mechanized lifting cranes.
- Does the DIN S18 Rail share the same parameters as heavy railway tracks?
No, it is specifically manufactured under the light rail parameters of the DIN 5901 standard. Heavy transport tracks are governed by separate European standard EN 13674-1 guidelines, which handle completely different dimensional and load-bearing requirements.
- What standard lengths are typically provided for DIN 5901 light rails?
These profiles are usually supplied in stock lengths of 6 meters, 8 meters, or 10 meters. Custom lengths can be precision-cut directly at the manufacturing line to fit specific project prints, which reduces manual cutting and joint preparation during field installation.
- Can the S18 Railway Steel Rail handle thermite welding methods at the job site?
Yes, the specific carbon-manganese composition allows excellent field weldability. It can be successfully joined using standard thermite welding or manual electric arc methods, provided proper pre-heating steps are followed to preserve uniform material hardness.
- What specific mechanical properties prevent wear on DIN 5901 S18 steel rails?
The inherent S18 Rail Material Properties provide a tensile strength from 680 to 880 MPa along with optimal surface hardness. This specific metallurgical layout effectively resists rapid surface pitting, rolling fatigue, and abrasive wear in harsh industrial environments.
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