High Hardness Oxide Black Oval Head Steel Rail Bolt 5.6 Grade For Railway

Standard:DIN, JIS, ISO, ANSI, ASME, BS, AS

Grade:4.8/ 8.8/ 10.9/ 12.9

Dimensions:M8, M10, M12, M14, M16, M18, M20, M22, M24 and so on

Surface Treatment:Zinc-plated, Plain, Black Anodize, Dacroment

Sticking to our quality first policy, ZHONGYUE pays great attention to quality control management. We have been granted ISO9001-2008 certificates and have received the production license of China's Railway Ministry on railway products. We have a full set of inspection instruments to ensure all our railway bolt products are of high quality and up to customers' requirements.

As a leading manufacturer of rail fastening based in China, ZHONGYUE also produces many other railway fasteners, such as track bolt, track spike, sleeper screw, rail anchor, rail joint bar, tie plate, rail clip, elastic rail clip, SKL tension clamp, rail shoulder, and so on.

Aplication

Railway, Mining, Bridge, Construction and so on

Production Procedure

Raw material —— Wiredrawing —— Cutting the wire rod to length —— forming the head —— cutting Edge —— Heat Treatment —— Surface treatment —— Final  inspection —— Packaging —— Shipment

Surface Treatment

1. plain (oiled)
2. color paint
3. oxide Black (most choice)
4. galavazing
5. DHG

Inspection machine

1. Brinell Hardness Tester
2. Carbon and Sulfur Analyzer
3. Rockwell Hardness Machine
4. Automatic Impact Testing Machine
5. Metallographic Microscope
6. Automatic High-speed Analyzer
7. Fatigue Testing Machine
8. Metallographic Specimen Polishing Machine
9. Metallographic Specimen Pointing Machine

Package