What are the standard S20 rail mechanical properties?

What are the standard S20 rail mechanical properties?

 

The mechanical properties of a DIN 5901 S20 rail define its ability to withstand vertical loads, resist surface wear, and maintain structural integrity under the dynamic stresses of industrial operations. While the S20 rail dimensions (100 mm height, 82 mm base) are fixed by the German standard, the actual mechanical performance is dictated by the chosen steel grade-most commonly 55Q or Q235B.

 

 

• Tensile Strength (σb): This represents the maximum stress the rail can withstand while being stretched. For high-carbon 55Q rail steel, this is typically ≥ 710 MPa, providing the structural backbone for 3.5-ton axle loads.

 

• Surface Hardness (HB): Hardness is critical for the 30 mm S20 rail head width. Standard rail steel (55Q) offers a Brinell hardness of 200–240 HB, which prevents the head from "mushrooming" under the concentrated pressure of steel wheels.

 

• Yield Strength (σs): This is the point at which the S20 rail profile will permanently deform. For 55Q steel, the yield strength is generally ≥ 410 MPa, ensuring the rail returns to its original shape after a heavy crane passes.

 

• Elongation (δ5): This measures the material's ductility. A standard S20 rail in 55Q grade has an elongation of ≥ 13%, providing enough flexibility to absorb vibrations without cracking.

 

Q235B	Mechanical property						Chemical composition(%)
	Yield strength		Tensile strength		Elongation	Hardness	C	Si	Mn	S	P
	MPa	kg/mm²	MPa	kg/mm²	min	HB		≤		≤	≤
	≥	≥
	235	24	375-460	38-47	26%		0.12-0.22	0.35	0.30-0.70	0.045	0.045

 

55Q	Mechanical property						Chemical composition(%)
	Yield strength		Tensile strength		Elongation	Hardness	C	Si	Mn	S	P
	MPa	kg/mm²	MPa	kg/mm²	min	HBW				≤	≤
	≥	≥	≥	≥		≥
			685	69		197	0.50-0.60	0.15-0.35	0.60-0.90	0.04	0.04

 

GNEE RAIL ensures that every batch of DIN 5901 S20 rail meets these technical benchmarks through rigorous laboratory testing. By strictly controlling the chemical composition-particularly the manganese and carbon ratios-we deliver S20 Steel Rail that balances extreme hardness with the structural toughness required for gantry cranes, mining transport, and automated warehouse tracks.

 

What are the specifications of the Rail S20?

 

The Rail S20 is a medium-weight light steel rail, commonly produced according to the DIN 5901 European standard. It is widely used in industrial applications, such as factory floors, mining areas, crane tracks, and warehouse logistics systems.

 

Key Specifications of the S20 Rail:

 

• Weight: 19.80 kg/m (kilograms per meter)

 

• Standard Length: Commonly 6m, 8m, 10m, or 12m, with custom lengths available

 

• Dimensions (approximate):

 

Height: 100 mm

Base Width: 82 mm

Head Width: 44 mm

Web Thickness: 10 mm

 

 

Size	Rail height(mm) A	Bottom Width(mm) B	Head Width(mm) C	Web Thickness(mm) t	Weight(kg/m) *
S10	70	58	32	6	10
S14	80	70	38	9	14
S18	93	82	43	10	18.3
S20	100	82	44	10	19.8
S24	115	90	53	10	24.4
S30	108	108	60.3	12.3	30.03

 

What industries can DIN S20 rail be applied to?

 

DIN S20 rail (DIN 5901 standard, 19.8 kg/m) is a medium-weight, hot-rolled steel profile used across various industries requiring reliable, moderate-load transportation and logistics support. It is commonly applied in the following sectors:

 

Key Industrial Applications:

 

• Factory Floor Rail Systems: Used for in-plant transfer trolleys, production lines, and automated material handling equipment.

 

• Crane and Port Tracks: Suitable for light overhead cranes, gantry cranes, and mobile lifting systems in workshops and storage areas.

 

 

• Mining and Tunneling: Applied in underground or open-pit mines for ore carts, maintenance service tracks, and temporary transport routes.

 

• Warehouse and Logistics: Ideal for Automated Guided Vehicles (AGVs), forklift guidance, and material conveyance.

 

• Construction and Infrastructure: Used for temporary tracks for construction machinery and materials transport.

 

• Transportation and Tourism: Applied as narrow-gauge rails for tourist park railways, industrial railroads, and forestry transport.

 

FAQ

 

• What is the most important property for crane tracks?

Surface hardness is paramount. The 200–240 HB found in 55Q grade steel ensures the 30 mm head doesn't deform under the high-frequency point loads of gantry crane wheels.

 

• Does the S20 rail weight per meter change with different grades?

No. The S20 steel rail weight remains 19.80 kg/m. The mechanical properties are a result of the chemical composition, which does not significantly alter the density of the steel.

 

• Why is elongation important for mining rails?

Mining tracks often experience ground shifts. An elongation of ≥ 13% ensures the S20 light rail system can flex slightly without snapping, maintaining safety in underground environments.

 

• Can I weld S20 rail with high yield strength?

High-strength rails like 55Q require specialized pre-heating (250°C – 300°C) to prevent the weld zone from becoming brittle. For most users, using an S20 rail joint bar is the safer mechanical solution.

 

GNEE RAIL provides a full range of steel rails, from light track profiles to heavy infrastructure, ensuring a precise match for any requirement. We offer professional customization services, including precision cutting and custom hole drilling to match your specific S20 rail drawing or joint layouts. Our company supplies a complete suite of matched fasteners and joint bars, and we utilize decades of global logistics experience to ensure that your orders arrive securely and on time at any project site worldwide.

 

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