AREMA Rail Joint Bar | Standard, Compromise, Insulated Splice Bars

 

The primary function of an AREMA rail joint bar (also referred to as a splice bar, angle bar, or fishplate) is to securely connect and align the ends of two adjoining rails, ensuring proper load transfer and maintaining track geometry under heavy axle loads. According to AREMA engineering practices, a rail joint bar must effectively restrict lateral and vertical movement of rail ends while accommodating the longitudinal thermal expansion and contraction of steel rails, thereby maintaining operational safety and track integrity.

 

Fish plates connect rail ends and maintain alignment at rail joints.

 

At GNEE RAIL, we manufacture and supply a comprehensive range of AREMA rail joint bars for North American rail sections, including 100RE, 115RE, 132RE, 136RE, and 141RE profiles. Our rail joint bars are engineered for heavy-haul freight railways, passenger transit systems, industrial sidings, and maintenance applications, and are manufactured in accordance with applicable AREMA dimensional and material requirements. In the following sections, we outline the engineering requirements, dimensional tolerances, material grades, and manufacturing specifications commonly referenced in railway procurement projects.

 

 

The selection of an AREMA rail joint bar is primarily determined by rail profile compatibility, operating conditions, and signalling requirements. In North American railway engineering practice, AREMA rail joint bars are commonly categorized into three main types:

 

 

• Application: Used to connect two rails of identical rail section and profile, ensuring proper load transfer and maintaining track alignment.

 

• Common Rail Sections:

 

• Typical Configurations: Common configurations include 24-inch (4-hole) and 36-inch (6-hole) joint bars, depending on rail section, axle load, and service requirements.

 

• Design Feature: Selected bolt holes are manufactured with oval profiles to engage the oval neck of standard track bolts, preventing bolt rotation during installation.

 

• Typical Applications: Heavy-haul freight railways, passenger rail transit systems, industrial sidings, and maintenance projects.

 

 

Designed for connecting two different AREMA rail sections while maintaining proper running surface elevation and gauge alignment. Compromise AREMA rail joint bars are commonly used during track rehabilitation, rail upgrades, and transition installations where existing and replacement rail profiles differ.

 

• Common AREMA Rail Combinations:

 

• Directional (Left-Hand / Right-Hand): Required when the rail head widths differ and gauge-side alignment must be maintained.

 

• Non-Directional: Used when profile differences are limited to rail height or when the gauge-side head width difference does not exceed 1/8 inch.

 

• Typical Applications: Rail profile transitions, track rehabilitation projects, maintenance operations, and railway infrastructure upgrades.

 

 

Insulated AREMA rail joint bars are designed to electrically isolate adjacent rail sections while maintaining the structural integrity of the track joint. They are essential components in railway signalling systems utilizing track circuits and electrical train detection systems.

 

• Common AREMA Rail Sections:

 

• Continuous Insulated Joints: Provide continuous support beneath the rail base and utilize insulated bushings, end posts, and washers to maintain electrical separation.

 

• Non-Continuous Insulated Joints: Typically use insulated steel assemblies or composite materials to provide electrical isolation while supporting operational rail loads.

 

• Typical Applications: Track circuits, signalling blocks, level crossings, insulated track sections, and passenger railway systems.

 

Need a Custom Compromise or Insulated AREMA Rail Joint Bar?

 

GNEE RAIL provides engineering support, CAD drawing verification, and customized manufacturing for AREMA compromise and insulated rail joint bars, including left-hand, right-hand, and special transition configurations.

 

Send your rail section details or drawings today for a technical review and a quick quotation.

 

 

Material selection directly affects the strength, wear resistance, and fatigue performance of AREMA rail joint bars under repeated railway loading cycles. GNEE RAIL manufactures standard AREMA rail joint bars using heat-treated 55# carbon steel, which meets the material requirements specified for AREMA quenched carbon steel joint bars.

 

 

 

Technical Factor	GNEE RAIL 55# Steel	Benefit for AREMA Rail Joint Bars
Carbon Content	0.52%–0.60%	Provides high hardness and wear resistance after heat treatment
Phosphorus (P)	≤0.035%	Lower brittleness and improved fatigue life
Sulfur (S)	≤0.035%	Reduced segregation and improved toughness
Heat Treatment	Quenched & Tempered (Q&T)	Produces a tempered martensitic structure
Yield Strength	≥490 MPa	Meets AREMA requirements
Tensile Strength	≥735 MPa	Meets AREMA requirements

 

 

Element	AREMA Chapter 4 Requirements (%)	GNEE 55# Steel Limits (%)	Technical Evaluation & Compliance
Carbon (C)	0.35 – 0.60	0.52 – 0.60	Compliant. The carbon content of 55# steel is situated in the upper-middle spectrum of the AREMA limit, maximizing surface hardenability and wear resistance on fishing surfaces after quenching.
Manganese (Mn)	≤ 1.20	0.50 – 0.80	Compliant. Keeping manganese levels controlled well below the 1.20% ceiling prevents excessive embrittlement while maintaining adequate hardenability.
Phosphorus (P)	≤ 0.050	≤ 0.035	Stricter than Standard. Restricting phosphorus to ≤ 0.035% minimizes cold-shortness (low-temperature brittleness), which is vital for track safety in cold climates.
Sulfur (S)	≤ 0.040	≤ 0.035	Stricter than Standard. Lower sulfur limits minimize harmful iron sulfide inclusions, reducing the risk of hot-shortness during hot-rolling and forging.
Silicon (Si)	Not Specified	0.17 – 0.37	Controlled Addition. Silicon acts as a deoxidizer in steelmaking, refining grain size and improving the elastic limits of the joint bar.
Cr / Ni / Cu	Not Specified	Each ≤ 0.25 – 0.30	Trace Limit Control. Keeping residual alloying elements low ensures high material purity and a highly uniform response during oil quenching and tempering.

 

 

Standard / Heat Treatment State	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Reduction of Area (%)
AREMA Chapter 4 Minimum Limit (Quenched)	≥ 690 MPa (100,000 psi)	≥ 480 MPa (70,000 psi)	≥ 12%	≥ 25%
55# Steel - Quenched & Tempered (Supplied State - Exceeds AREMA)	≥ 735 MPa (~106,600 psi)	≥ 490 MPa (~71,000 psi)	≥ 12%	≥ 35%

 

Request Sample MTCs & Material Test Reports

 

All AREMA rail joint bars are supplied with material traceability documentation, including chemical composition analysis and mechanical property test reports. Mill Test Certificates (MTCs) are available to verify compliance with the material requirements for heat-treated AREMA rail joint bars.

 

 

 

AREMA rail joint bars are designed specifically for individual RE rail profiles and are not interchangeable. The table below compares the dimensions and configurations of commonly used AREMA rail joint bar models.

 

 

AREMA Rail Joint Bar Type	Compatible Rail Section	Standard Length Options	Bolt Hole Configuration	Key Design Features	Typical Applications
115RE Joint Bar	115RE Rail	24" (4-hole), 36" (6-hole)	Alternating Round & Oval (1" or 1-1/8")	Optimized balance of strength and installation economy	Freight railways, regional railroads, industrial sidings, passenger transit
132RE / 136RE Joint Bar	132RE & 136RE Rail	24" (4-hole), 36" (6-hole)	Alternating Round & Oval (1-1/8")	Heavier cross-sections and increased joint stiffness	Heavy-haul railways, Class I freight corridors
141RE Joint Bar	141RE Rail	36" (6-hole)	Alternating Round & Oval (1-1/8")	Heavy-duty design for very high axle loads	Mining railways, heavy freight corridors, high lateral load track sections

 

 

The table below summarizes the key structural and dimensional differences between AREMA rail joint bars and other major international rail joint standards.

 

Standard System	Measurement System	Bolt Hole Profile	Fastening Bolt Style	Design & Structural Features	Typical Rail Joint Bar Types
AREMA (North America)	Imperial (Inches)	Alternating Round & Oval	Oval-neck track bolts	Heavy cross-section for high axle-load freight and heavy-haul railways	115RE / 132RE / 136RE / 141RE rail joint bars
UIC (Europe / International)	Metric (Millimeters)	Circular or Square	Square-neck or T-head bolts	UIC 864-4 compliant design with optimized fishing surfaces for ballast-based track systems	UIC54 / UIC60 rail joint bars (standard & compromise types)
BS (British Standard)	Imperial / Metric	Circular	Standard track bolts	Designed for bullhead and early flat-bottom rail systems with legacy compatibility	BS 80 / BS 100 rail joint bars
GB (China)	Metric (Millimeters)	Circular or Square	Square-neck or round bolts	TB/T standard system with emphasis on high-speed rail fatigue resistance	50kg/m / 60kg/m rail joint bars

 

Need AREMA, UIC, and GB Rail Joint Bars in One Project?

 

GNEE RAIL supplies rail joint bars compatible with AREMA, UIC, DIN, BS, and GB rail systems. Our manufacturing capability covers standard, compromise, and insulated joint bar configurations, enabling unified procurement for multi-standard railway projects.

Send Your Rail Standards for a Fast Quotation

 

 

 

GNEE RAIL supplies AREMA rail joint bars and fishplates for international railway infrastructure, freight corridors, and industrial track systems. Our export experience covers technical compliance, documentation preparation, packaging, and international logistics coordination.

 

Export Case Example – Dubai Railway Project

GNEE RAIL supplied rail joint bars and fastening components for a railway infrastructure project in Dubai, including:

 

• Production based on project specifications

 

• Export packaging for long-distance marine transport

 

• Delivery schedule coordination

 

• Full documentation support (including MTC and inspection reports)

 

• ISO 9001:2015 quality management system compliance

 

 

Export packaging display of GNEE fish plates

 

 

Customer visit to GNEE

 

 

60E2 Fishplate MTC

 

 

Each batch of AREMA rail joint bars is inspected before shipment to ensure compliance with dimensional and material requirements.

 

 

• Dimensional inspection: bolt hole position, flatness, straightness

 

• Chemical & hardness testing: verification of 55# steel composition and heat treatment performance

 

• Mechanical testing: tensile strength (≥490 MPa) and elongation (≥12%) verification

 

• Documentation: Mill Test Certificates (MTC) provided per batch upon request

 

 

GNEE RAIL provides surface protection options for different railway environments:

 

• Black / Oiled: general railway use and storage protection

 

• Hot-Dip Galvanizing (HDG): coastal and high-humidity environments

 

• Sherardizing: uniform zinc protection without affecting dimensional tolerance

 

• Epoxy / Painted: tunnels, subway systems, and chemically aggressive environments

 

All surface treatments are applied without affecting AREMA dimensional compliance.

 

 

GNEE RAIL provides integrated supply solutions to ensure full compatibility between rail joint bars, fasteners, and rail sections.

 

• AREMA rail joint bars (115RE / 132RE / 136RE / 141RE)

 

• Matching fastening systems (bolts, nuts, spring washers)

 

• Compatible rail sections for system integration (AREMA / UIC / other standards)

 

This integrated supply approach reduces installation errors, improves procurement efficiency, and ensures dimensional compatibility across all track components.

 

 

Q: Which AREMA rail joint bar sizes can GNEE RAIL supply?

 

A: GNEE RAIL manufactures and supplies AREMA rail joint bars for a wide range of North American rail sections, including 100RE, 115RE, 119RE, 132RE, 136RE, and 141RE profiles.

 

Q: Can GNEE RAIL manufacture custom compromise AREMA rail joint bars?

 

A: Yes. We provide engineering support, CAD drawing review, and customized manufacturing for compromise, transition, left-hand, right-hand, and insulated AREMA rail joint bars.

 

Q: Do you provide Mill Test Certificates (MTCs)?

 

A: Yes. Chemical composition reports, mechanical test reports, and Mill Test Certificates (MTCs) are available for all production batches.

 

Q: Can AREMA rail joint bars be used with UIC rail sections?

 

A: No. Standard AREMA rail joint bars are designed specifically for North American RE rail profiles. Projects involving different rail standards require specially engineered compromise or transition joint bars.

 

Q: What factors affect the service life of insulated AREMA rail joint bars?

 

A: Service life depends on axle load, traffic volume, track conditions, maintenance practices, and joint design. Continuous insulated joints generally provide longer service life due to improved load distribution.

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