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Railway Sleeper Dowel Pin 20mm Diameter, 150mm Length, Heat Treated HRC 35-40, Black Oxide Finish for Corrosion Resistance
Product Spotlights
Precision 20mm x 150mm railway sleeper dowel pin with heat treatment to HRC 35-40 and black oxide finish for superior corrosion resistance. Manufactured by a certified factory since 1998 with annual export over US$5M. Customizable sizes, free samples available, competitive pricing for bulk orders.
Negotiable
MOQ: 1 Piece (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Diameter:
20mm
Length:
150mm
Hardness:
HRC 35-40
Payment & Shipping
Payment Methods:
Port of Shipment:
tianjin shanghai qingdao
Delivery Detail:
Delivery time depends on order quantity.
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Diameter
20mm
Length
150mm
Hardness
HRC 35-40
Surface Finish
Black Oxide
Material
Carbon Steel (optional alloy)
Application
Railway Sleepers / Ties
Heat Treatment
Through Hardened
Tolerance
ISO h7 (customizable)
Anping County Boli Hardware Wiremesh Products Factory has been a trusted manufacturer of precision metal components since 1998, exporting over US$5 million worth of products annually to global markets including North America, Europe, and Southeast Asia. Our Railway Sleeper Dowel Pin (20mm diameter, 150mm length) is engineered to meet the demanding requirements of railway infrastructure. Featuring heat treatment to HRC 35-40 and a black oxide finish for exceptional corrosion resistance, this dowel pin ensures reliable fixation of rail fastening systems in sleepers, reducing maintenance costs and extending service life. With our state-of-the-art manufacturing facilities in Hengshui, Hebei, we deliver consistent quality and precision that international railway contractors and OEMs rely on.
Key Features & Technical Specifications
- Precision Dimensions: 20mm diameter ±0.1mm, 150mm length ±0.5mm, ensuring tight fit in pre-drilled sleeper holes.
- Hardness Range: Heat treated to HRC 35–40, providing optimal balance between strength and ductility for heavy-duty railway applications.
- Corrosion Protection: Black oxide finish forms a protective layer that resists rust and moisture, ideal for outdoor or tunnel environments.
- Material Options: Standard carbon steel (C45 or equivalent) with optional alloy steel (e.g., 40Cr) for enhanced wear resistance – available upon request.
- Surface Evenness: Chamfered ends for easy insertion and reduced stress concentration.
- Customizable Tolerances: We can adjust diameter, length, chamfer angle, and hardness to match your specific sleeper design.
| Parameter | Value | Notes |
|---|---|---|
| Diameter | 20 mm | Customizable from 16mm to 30mm |
| Length | 150 mm | Customizable from 100mm to 300mm |
| Hardness | HRC 35–40 | Other ranges available on request |
| Surface Finish | Black Oxide | Also available: zinc plating, phosphating |
| Material | Carbon Steel (C45) | Alloy steel optional |
Benefits for Your Railway Projects
- Enhanced Safety: The precise fit and consistent hardness prevent loosening of rail fasteners, reducing the risk of track misalignment.
- Longer Durability: Heat treatment and black oxide coating extend the pin’s service life even under heavy dynamic loads and harsh weather.
- Ease of Installation: Chamfered ends and smooth surface allow quick insertion without damaging the sleeper or the pin itself.
- Cost Savings: Reduced need for replacement and maintenance lowers total lifecycle cost for railway operators.
- Global Compatibility: Designed to fit standard sleeper drilling patterns used in North America, Europe, and Asia.
Our manufacturing facility in Hengshui, Hebei covers over 10,000 square meters and employs advanced CNC turning, heat treatment, and surface finishing lines. We have shipped millions of dowel pins to railway projects in over 20 countries, including heavy-haul lines in Australia and high-speed rail in Eastern Europe. Our quality control system includes hardness testing on every batch, dimensional inspection with calibrated gauges, and salt spray testing for corrosion resistance. We offer free samples for evaluation before bulk orders, and our typical lead time is 15–25 days depending on quantity. With annual export value of US$5–10 million, we are a reliable partner for long-term cooperation. Contact us today to discuss your specific requirements and receive a competitive quote.
Frequently Asked Questions
1. What material is the dowel pin made of?
Standard material is carbon steel (C45 or equivalent). We can also supply alloy steel (e.g., 40Cr) for higher strength applications – please specify your requirement.
Standard material is carbon steel (C45 or equivalent). We can also supply alloy steel (e.g., 40Cr) for higher strength applications – please specify your requirement.
2. Can you provide a different diameter or length?
Yes, diameters from 16mm to 30mm and lengths from 100mm to 300mm are available. Custom sizes are also possible with a brief engineering discussion.
Yes, diameters from 16mm to 30mm and lengths from 100mm to 300mm are available. Custom sizes are also possible with a brief engineering discussion.
3. Is the black oxide finish environmentally friendly?
Our black oxide process uses controlled oxidation and meets RoHS requirements. It does not contain hexavalent chromium or other restricted substances.
Our black oxide process uses controlled oxidation and meets RoHS requirements. It does not contain hexavalent chromium or other restricted substances.
4. How do you ensure the HRC hardness is consistent?
We use hardness testers (Rockwell) on every batch, and our heat treatment furnace is calibrated regularly. A test report can be provided with each shipment.
We use hardness testers (Rockwell) on every batch, and our heat treatment furnace is calibrated regularly. A test report can be provided with each shipment.
5. What is the typical lead time for a container order?
For standard sizes, lead time is 15–20 days after deposit. For custom sizes, it may extend to 25–30 days depending on quantity.
For standard sizes, lead time is 15–20 days after deposit. For custom sizes, it may extend to 25–30 days depending on quantity.
6. Do you offer samples before bulk order?
Yes, free samples are available. You only need to pay for shipping. Samples will be sent within 5 working days.
Yes, free samples are available. You only need to pay for shipping. Samples will be sent within 5 working days.
7. Can you package the dowel pins for export?
We pack in cartons or wooden pallets, with bubble wrap or plastic bags to prevent scratches. Custom packaging (e.g., with your logo) is available upon request.
We pack in cartons or wooden pallets, with bubble wrap or plastic bags to prevent scratches. Custom packaging (e.g., with your logo) is available upon request.
8. What is the minimum order quantity (MOQ)?
Our MOQ is 5,000 pieces for standard sizes. For custom sizes, MOQ may be higher – please contact our sales team for details.
Our MOQ is 5,000 pieces for standard sizes. For custom sizes, MOQ may be higher – please contact our sales team for details.
Send Inquiry to This Supplier
Mr. Geng Xiaozhong
Sales Manager
2Yrs
Hengshui, Hebei, China
2Yrs
Business Type
Manufacturer
Year Established
1998
Annual Export Value
US$5 Million - US$10 Million
Port of Shipment
Tianjin, Qingdao, qingdao, shanghai, foshan
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