DIN S20 Light Steel Rail

 

An S20 light steel rail is a specific flat-bottomed rail profile designed primarily for light-duty transportation, material handling, and crane runway systems. It is manufactured according to European standardization, specifically conforming to the DIN 5901 (or historical DIN 20501) standard.The designation "S20" indicates its theoretical weight classification, weighing approximately 19.8 kg per meter.

 

 

 

Type	Dimension (mm)				Weight	Length
	Head	Height	Bottom	Web	(kg/m)	(m)
S7	25	65	50	5	6.75	6m-12m
S10	32	70	58	6	10	6m-12m
S14	38	80	70	9	14	6m-12m
S20	44	100	82	10	19.8	6m-12m

 

 

Theoretical Weight	19.8 kg/m (39.91 lb/yd)
Cross-sectional Area (A/S)	25.26 cm² (3.92 in²)
Moment of Inertia (Ix)	346 cm⁴ (8.31 in⁴)
Section Modulus (W) – Base/Rail Foot	66.8 cm³ (4.08 in³)
Section Modulus (W) – Rail Head	66.8 cm³ (4.08 in³)

 

With over a decade of railway export experience, GNEE RAIL provides S20 rail with export-grade packaging, corrosion protection, and organized container loading for international delivery. Each shipment is supplied with an MTC linked to the rail heat number, providing traceability of chemical composition and mechanical properties, including tensile strength, yield strength, elongation, and hardness.

 

 

 

While European Grade R0550 (Material No. 1.0422) is traditionally specified for European light rail sections (such as S 10 to S 20), Chinese Grade 55Q serves as a premium, high-strength equivalent. 55Q meets and exceeds the mechanical requirements of R0550 through an upgraded, carbon-optimized chemical matrix.

 

 

• Superior Tensile Strength: 55Q delivers a robust tensile strength of 685 MPa, outperforming the R0550 baseline specification (≥ 540 MPa) by approximately 26%.

 

• Enhanced Wear Resistance: With a guaranteed hardness of ≥ 197 HBW, 55Q provides excellent resistance to rolling contact fatigue and surface deformation under regular wheel loads.

 

• Flawless Profile Compatibility: 55Q is natively rolled into light rail profiles matching international and national standards, making it a 100% functional drop-in replacement for R0550 track layouts.

 

 

The table below demonstrates how 55Q achieves superior mechanical performance through a highly refined, medium-carbon chemistry compared to the lower-carbon, high-manganese design of R0550.

 

1. Chemical Composition (%)

 

Steel Grade	Carbon (C)	Silicon (Si)	Manganese (Mn)	Phosphorus (P)	Sulphur (S)
55Q	0.50 – 0.60	0.15 – 0.35	0.60 – 0.90	≤ 0.040	≤ 0.040
R0550 (Cast)	0.20 – 0.40	0.05 – 0.35	0.60 – 1.10	≤ 0.040	≤ 0.040

 

Engineering Note: 55Q utilizes a precise, higher carbon range (0.50%–0.60%) to establish a naturally harder, pearlitic microstructure. R0550 relies instead on elevated Manganese levels to compensate for its lower carbon content.

 

2. Mechanical Properties

 

Property	Chinese 55Q	European R0550 (1.0422)	Performance Verdict
Tensile Strength (Rm)	685 N/mm^2	≥ 540 N/mm^2	55Q offers higher load capacity
Hardness (HBW)	≥ 197	Not specified	55Q ensures longer wear life
Elongation at Break (A)	Highly Ductile	≥16%	Both grades offer excellent structural toughness

 

 

The DIN 5901 S20 light steel rail is engineered for light-duty transportation networks, specialized material handling lines, and compact structural crane tracks. Due to its specific cross-sectional geometry (100 mm height, 82 mm base width) and material hardness provided by steel grades like R700 or 55Q, it operates effectively in environments with strict weight limits and light rolling wheel loads.

 

The primary industrial applications are categorized below by their operational environment and mechanical function:

 

• Overhead Crane Runways and Gantry Systems: Used for light-duty overhead traveling cranes, monorail hoists, workstation gantries, and wall-traveling crane systems.

 

• Mining and Underground Haulage Tracks: Suitable for low-tonnage mine tubs, material cars, and underground haulage systems. The 10 mm web provides adequate structural support for light-duty mining applications.

 

• Construction and Agricultural Logistics: Used for temporary construction tracks, tunneling and pipe-jacking projects, as well as selected agricultural and forestry transport lines where a compact light-rail profile is required.

 

 

 

As a dedicated railway component manufacturer and global exporter, GNEE RAIL delivers high-performance S20 rail solutions backed by verified technical expertise, strict quality management, and comprehensive supply chain capabilities.

 

 

GNEE RAIL supplies S20 light rail with dimensional and quality control based on the agreed DIN 5901 profile requirements. Key dimensions, including the 100 mm rail height, 82 mm base width, and 44 mm head width, are inspected to ensure profile consistency. Our quality management system follows ISO 9001:2015, covering material verification, production control, and final inspection. Third-party inspection such as SGS, BV, or TÜV can also be arranged upon request for specific projects.

 

 

GNEE RAIL provides full-scale processing and material customization to match your specific engineering layouts:

 

 

• Length Customization: While standard stock lengths include 5m to 12m segments, we provide precise sawing and abrasive cutting to deliver custom lengths directly to your project site.

 

• Secondary Processing: Our workshop offers precise structural modifications, including standard 4-hole or custom rail end drilling for fishplate installations, bevel cutting for expansion joints, and specialized miter cuts.

 

 

To prevent component mismatches that lead to structural track failure, GNEE RAIL manufactures and supplies the complete system of matching accessories designed specifically for the 82 mm base width of the S20 rail:

 

• S20 Fishplates / Joint Bars: Precision-stamped 4-hole flat fishplates that seamlessly match the S20 web radius.

 

 

Profile	Spacing (mm)-A	Spacing (mm)-B	Spacing (mm)-C	Diameter (mm)-D	Elevation (mm)-E
S20	35	90	90	20	44.6

 

• Track Fasteners: High-tensile M16 fishbolts, nuts, and spring washers configured for dynamic shock loading.

 

• Rail Clips: An elastic rail clip (also known as a rail fastening clip or elastic tension clamp) is a crucial track component used to secure steel rails to railway sleepers.

 

• Elastic Pads: Continuous rubber pads designed to damp vibrations in crane runways and automated warehouses.

 

 

 

 

Q1: What standard does the S20 rail comply with, and what are its key dimensions?

 

A: The S20 rail is manufactured according to the German standard DIN 5901, with a nominal weight of approximately 19.8 kg/m. Its standard profile dimensions feature a height of 100 mm, a base width of 82 mm, a head width of 44 mm, and a web thickness of 10 mm.

 

Q2: What are the primary applications for the S20 light rail?

 

A: This rail profile is typically utilized for low-to-medium load transportation systems, such as mining tracks, forest railways, and brickyard material lines.It is also commonly installed in light-duty crane runways and automated warehousing systems that do not require heavy crane rail profiles.

 

Q3: Do you provide matching installation accessories for the S20 rail?

 

A: Yes, we offer a complete range of compatible jointing and fastening
accessories to facilitate installation.Our inventory includes standard S20 joint bars (fishplates), matching track bolts and nuts, and various rail clips designed for both concrete and steel foundations.

 

Q4: What are the standard delivery lengths for the S20 rail?

 

A: S20 rails are generally supplied in standard lengths of 6, 8, or 10 meters to optimize transport and handling. Custom lengths and specific end-drilling configurations can also be provided upon request to match your layout requirements.

 

Contact now

 

At GNEE RAIL, we supply S20 rails manufactured to DIN 5901 standards, offeringreliable material options and a full suite of matching accessories to supportyour project. Our team is prepared to assist you with technical specifications,customized length requests, and efficient delivery scheduling. Contact us today to discuss your tracking requirements and receive a detailed quotation for your project.

 

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