Description
Technical Parameters
Rail Dog Spike Fastening System
The Railway Dog Spike is a forged steel fastening component with an offset L-shaped head and square shank, engineered to secure rails and tie plates to wooden sleepers through direct mechanical interlock . Manufactured from carbon steel grades including Q235, 45#, and 55#, with property classes ranging from 4.6 to 8.8, these spikes achieve tensile strength of 400–800 MPa depending on specification .
Technical Specifications:
| Parameter | Standard Commercial | AREMA High-Tensile | Heavy-Duty Grade | Australian Standard |
|---|---|---|---|---|
| Material | Q235 / Low Carbon | 45# Medium Carbon | 55# / Alloy Steel | Q235 / 45# |
| Carbon Content | 0.14–0.22% | 0.17–0.25% | 0.22–0.30% | 0.17–0.25% |
| Property Class | Grade 4.6 | 70,000 psi min | Grade 8.8 | AS 1085.8 |
| Tensile Strength | ≥400 MPa | ≥483 MPa (70 ksi) | ≥800 MPa | ≥500 MPa |
| Yield Strength | ≥240 MPa | ≥317 MPa (46 ksi) | ≥640 MPa | ≥300 MPa |
| Elongation | ≥22% | ≥25% (2" gauge) | ≥12% | ≥20% |
Installation & Maintenance Perspective:
- Available materials: Q235, 45#, 55# carbon steel with property classes 4.6, 5.6, 8.8
- AREMA high-tensile grade: 70,000 psi (483 MPa) tensile, 46,000 psi (317 MPa) yield, 25% elongation
- Optimized carbon content: 0.17–0.25% with manganese 0.90–1.35% for strength-ductility balance
- Cold bend test: 90° without cracking verifies ductility for impact driving
- Hardness range: 85–95 HRB for low-carbon grades ensuring fracture resistance
Maintenance & Operational Perspective
- Square shank (14–16mm) provides 50% higher holding power than equivalent round shanks
- Offset L-shaped head with sloped underside matches rail base angle for uniform clamping
- Wedge-shaped point driven across wood grain doubles pull-out resistance versus with-grain driving
- Two-lug "dog-eared" head design (European style) or spoon-shaped head (American style)
- Pull-out resistance documented: 857 lbs in dry cedar, 4,281 lbs in seasoned oak (9/16" spike)
Gnee Professional supplier
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