Rail Fish Plate for Rail P50

A rail fish plate (or joint bar) for P50 rail is a heavy-duty connector used to join two sections of P50 rail (50 kg/m), ensuring track stability and smooth transit. These components are primarily manufactured according to GOST standards for Russian and Eurasian rail systems. 

Technical Specifications

• Rail Compatibility: Specifically designed for P50 (R50) heavy rail, which weighs approximately 51.8 kg/m and stands 152 mm tall.

• Material: Generally manufactured from high-quality structural steel such as 50Mn, 55#, or Q235B. 50Mn is preferred for its high strength and hardness after heat treatment.

• Hole Configuration: Available in 4-hole and 6-hole versions.

• 6-hole variants are the standard for mainlines to provide higher joint rigidity.

• 4-hole variants are typically used for lighter-duty or industrial tracks.

• Standard Length: Often supplied in lengths of 610 mm or customized to match specific rail drilling requirements. 

Key Features

• Alignment & Load Distribution: The plate's geometry matches the rail's web and underside of the head to maintain horizontal and vertical alignment while distributing wheel loads across the joint.

• Installation: Secured using high-strength fish bolts (typically 3 bolts per rail end for a 6-hole plate) that pass through the rail web.

• Standards: Complies with GOST P51685-2022 and GOST 8193 for dimensions and mechanical properties. 

Applications

• State Railways: Used in low-speed, medium-load national railway lines.

• Industrial Infrastructure: Common in subway/metro networks, mining corridors, and industrial sidings.

• Transit: Frequently found in regions following Eurasian rail standards (Russia, Ukraine, Kazakhstan, etc.).