Description
Technical Parameters
Railway Screw Spikes - Technical Specifications & Standards
| Category | Specification | Application Notes |
|---|---|---|
| Product Type | Standard Railway Screw Spikes | For fastening rails to sleepers |
| Material Grade | 35CrMo Alloy Steel / Q345B | High strength, fatigue resistance |
| Surface Treatment | Hot-dip galvanizing 80μm | Salt spray test >800 hours |
| Thread Type | Metric coarse thread / Square thread | ISO 898-1 standard |
| Size Range | M22×175-M24×200 | Custom lengths available |
| Tensile Strength | ≥800 MPa | Meets UIC 864-8 requirements |
| Torque Value | 300-400 N·m | With special anti-loosening thread |
| Head Type | Hexagonal head / Square neck | For secure installation |
Railway Screw Spikes - Quality Assurance & Testing
| Test Category | Standard Requirement | Certification |
|---|---|---|
| Chemical Composition | GB/T 3077 | Material certificate provided |
| Mechanical Properties | Yield strength ≥640 MPa | Third-party inspection available |
| Hardness Test | 24-32 HRC | Batch testing report |
| Full Size Inspection | Thread gauge inspection | 100% dimensional check |
| Zinc Coating Test | ≥80μm thickness | Coating thickness report |
| Fatigue Test | 2 million cycles at 25kN | UIC 864-8 compliance |
| Sampling Plan | GB/T 2828.1 AQL 1.5 | Quality control certificate |
| Marking | Heat number, manufacturer ID | Full traceability guaranteed |
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