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Help CenterHardened Railway Sleeper Dowel Pin, 40Cr Alloy Steel, Quenched and Tempered, HRC 40-45, Precision Ground Surface
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Welcome to Anping County Boli Hardware Wiremesh Products Factory – a trusted manufacturer with over 25 years of experience (since 1998) in producing high-quality railway components. Our Hardened Railway Sleeper Dowel Pin is made from premium 40Cr alloy steel, undergoes quenched and tempered heat treatment, and achieves a hardness of HRC 40-45. The precision-ground surface ensures exceptional dimensional accuracy and a smooth finish, making it an ideal choice for secure rail fastening systems. We export annually US$5 million to US$10 million worth of products to markets worldwide, including North America, Europe, Southeast Asia, and Oceania, delivering reliable performance and long service life.
This dowel pin is specifically designed for railway sleeper applications, providing a robust connection between the sleeper and the rail base. The combination of 40Cr alloy steel and careful heat treatment gives it excellent wear resistance, fatigue strength, and impact toughness. The precision ground surface minimizes friction and ensures easy installation, while the consistent hardness across the entire pin guarantees uniform performance under heavy loads and harsh environmental conditions.
Key Features & Technical Specifications
- Material: 40Cr alloy steel – high carbon content for improved strength and hardenability.
- Heat Treatment: Quenched and tempered to achieve a balance of hardness and toughness.
- Hardness: HRC 40-45 – consistent throughout the part for reliable performance.
- Surface Finish: Precision ground – Ra ≤ 0.8 μm (customizable upon request).
- Dimensional Tolerance: ±0.02 mm on diameter, ±0.1 mm on length (standard).
- Customization: Diameter, length, chamfer, and end configuration available per customer drawing.
- Application: Suitable for all types of railway sleepers (concrete, wood, steel).
| Parameter | Value | Remarks |
|---|---|---|
| Material | 40Cr Alloy Steel | Equivalent to AISI 5140 |
| Hardness | HRC 40-45 | Uniform across cross-section |
| Surface Roughness | Ra ≤ 0.8 μm | Precision ground |
| Diameter Tolerance | ±0.02 mm | Tighter tolerance available |
| Length Range | 50 – 300 mm | Custom sizes welcomed |
| Heat Treatment | Quenched & Tempered | Full penetration |
Advantages for Your Application
- Improved Durability: The 40Cr steel with quenched and tempered treatment provides excellent wear resistance, reducing replacement frequency.
- Precision Fit: Ground surface ensures tight tolerances, preventing loosening under vibration and dynamic loads.
- Corrosion Resistance: Optional surface coatings (e.g., zinc plating, Dacromet) are available for harsh environments.
- Cost-Effective: Factory-direct pricing with consistent quality – no middleman markup.
- Global Compliance: We can produce to meet standards such as AREMA, UIC, or customer-specific requirements (please inquire).
Our dowel pins are manufactured using advanced CNC machining and heat treatment furnaces, with strict quality control at every stage. Each batch is tested for hardness and dimensional accuracy before shipment. We understand that railway components must meet the highest safety and reliability standards, and our team is dedicated to delivering products that exceed expectations.
Trusted Partner for Global Railways
With our factory located in Hengshui, Hebei, China, we have established a strong supply chain serving clients in North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and beyond. Our annual export value of US$5-10 million reflects the trust our customers place in us. We ship from Tianjin, Qingdao, Shanghai, and Foshan ports, ensuring timely delivery to major destinations worldwide.
We believe in long-term partnerships and offer flexible customization, competitive pricing, and responsive after-sales support. Whether you need standard sizes or tailored designs, our engineering team is ready to assist. Contact us today for a quotation or technical consultation – let us be your reliable supplier of railway sleeper dowel pins.
Frequently Asked Questions (FAQ)
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Q: What is the standard diameter tolerance for your dowel pins?
A: Our standard tolerance is ±0.02 mm on the diameter. Tighter tolerances (e.g., ±0.01 mm) can be achieved upon request. -
Q: Can you provide custom lengths or diameters?
A: Yes, we offer full customization. Please provide your drawing or specifications, and we will manufacture accordingly. -
Q: Do you offer any surface coating for corrosion protection?
A: Yes, we can apply zinc plating, Dacromet, black oxide, or other coatings as needed. Contact us for options. -
Q: How do you ensure the hardness consistency across the entire pin?
A: We use precise quench and temper processes with temperature control, and we perform hardness testing on each batch to ensure HRC 40-45 uniformly. -
Q: What is the typical lead time for an order?
A: For standard sizes, lead time is 15-25 days after order confirmation. Custom orders may take 20-30 days depending on complexity. -
Q: Can you supply samples for testing?
A: Yes, sample orders are welcome. We can provide samples of standard sizes at a nominal cost, and the cost will be deducted from the first bulk order. -
Q: Do you have any quality certifications?
A: We operate with a rigorous internal quality control system. Certifications such as ISO are available upon request – please inquire for specific requirements. -
Q: What is the minimum order quantity (MOQ)?
A: MOQ is typically 500 pieces for standard sizes, but we can negotiate for smaller quantities or trial orders.
Ready to order? Contact us at sales@bolihardware.com or visit our factory. We look forward to serving you!
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