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Steel Spring Rail Fastening W Clip for Railway Fastening

Steel Spring Rail Fastening W Clip for Railway Fastening

Product No.：202682191625
Price：nogotiation
Material：grade E steel
Standard：AAR or GB
mould charge：NO
Production time：40days
weight：4kgs
Package：Wooden Box
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Steel Spring W-Type Rail Fastening Clip for Railway Systems

Our Steel Spring W-Type Rail Fastening Clip (also known as W clip, SKL tension clamp, or elastic rail clip) is a critical component of modern railway track fastening systems. Designed to secure rails to sleepers through elastic clamping force, the W clip ensures track stability, maintains gauge alignment, and provides effective vibration damping under demanding railway operating conditions.

The W-type clip derives its name from its distinctive “W” shape. Through bending and torsional deformation, it generates a sustained buckling pressure that reliably holds the rail in position, preventing longitudinal and lateral movement relative to the sleeper. This elastic fastening mechanism is essential for maintaining track integrity and ensuring safe train operations.

Product Overview

W-type rail clips are widely used in conventional railway lines, high-speed passenger routes, heavy-haul freight networks, and urban transit systems. Manufactured from high-grade spring steel through precision forging and heat treatment processes, our clips deliver consistent clamping force, excellent fatigue resistance, and long service life. The fastening components can be pre-assembled on sleepers, significantly reducing site installation time and labor costs.

Material Specifications

The W clip is manufactured from high-performance spring steel grades, with options to meet various application requirements:

Material Grade	C (%)	Mn (%)	Si (%)	Cr (%)	Application
60Si2MnA	0.56-0.64	0.60-0.90	1.60-2.00	≤0.35	Standard general purpose
60Si2CrA	0.56-0.64	0.40-0.70	1.40-1.80	0.70-1.00	Heavy-haul, high-stress applications
55Si2Mn	0.52-0.60	0.60-0.90	1.50-2.00	≤0.35	Cost-effective alternative
38Si7	0.35-0.42	0.50-0.80	1.50-1.80	—	Superior toughness, low-temperature performance

Data sources: Industry standards GB/T 1222, DIN 17221

38Si7 demonstrates a tensile strength of 1300–1600 MPa, yield strength ≥1150 MPa, and maintains stable impact toughness even at -20°C, making it suitable for cold-climate railway operations.

Key Technical Specifications

Parameter	Specification
Product Type	W-Type Rail Fastening Clip (W1, W2, SKL1, SKL12, SKL14, W30 variants)
Material	60Si2MnA / 60Si2CrA / 55Si2Mn / 38Si7 spring steel
Bar Diameter	12mm – 20mm (customizable)
Hardness	HRC 42-47
Toe Load (Buckling Pressure)	200 kgf – 1,400 kgf (2 kN – 14 kN)
Deflection	9-12 mm (depending on clip type)
Fatigue Life	≥5 million cycles without breaking
Surface Treatment	Plain (oiled), Oxygen Black, Zinc Plated, Hot Dip Galvanized, Dacro Coating, Color Painting
Standards Compliance	GB/T 1222, DIN 17221, Q/CR 563, TB/T 1495.2
Manufacturing Process	Raw material inspection → Cutting → Heating → Forging → Heat Treatment → Surface treatment → Quality inspection

Performance Characteristics by Clip Model

Model	Bar Diameter (mm)	Toe Load (kN)	Deflection (mm)	Application
W-type Clip (standard)	13-16	7-9	≥8	Freight yards, conventional lines
SKL1 / SKL12 / SKL14	13	8-12	9-12	Concrete sleeper systems
W30	16-20	10-14	—	Subway, heavy-haul

Key Features

High Clamping Force: Generates consistent toe load (buckling pressure) through spring steel elastic deformation, effectively preventing rail longitudinal and lateral movement
Superior Fatigue Performance: Engineered to withstand ≥5 million load cycles without fracture under deflection conditions
Pre-Installation Capability: Components can be fully pre-assembled on the sleeper before site delivery, significantly reducing track-laying time and labor costs
Automated Tensioning: When the fastener is pushed into working position, correct tension is automatically achieved with the cast embedded base fixing rail gauge and clip deflection
Easy Maintenance: Clips can be removed without unscrewing bolts in rare replacement cases, simplifying maintenance operations
Corrosion Resistance: Multiple surface treatment options available to protect against environmental corrosion and extend service life
High Tensile Strength: Spring steel construction provides tensile strength up to 1600 MPa for 38Si7 grade, ensuring structural integrity under heavy loads