Grade 10.9 Railway-Grade High-Strength Hex Head Bolts

These high-strength hex head bolts are specially engineered for railway heavy-load working conditions. The standard specification is M24×150, and all dimensions can be customized according to client requirements.

Made of 40Cr alloy structural steel, the bolts feature Dacromet anti-corrosion coating with silver-gray appearance. Equipped with metric coarse thread (3mm pitch, 6g thread tolerance), matched complete sets including high-strength hex nuts, flat washers and spring washers. Installation adopts torque wrench tightening process.

Superior Mechanical Performance

· Tensile Strength ≥1040 MPa

· Yield Strength ≥940 MPa

· Hardness: HRC 32–39

· Elongation After Fracture ≥9%

· Room Temperature Impact Toughness ≥27 J

· Salt Spray Resistance ≥500 hours without red rust

The working temperature range covers -40℃ ~ 150℃. Products strictly follow GB/T 1228 and UIC 860 railway standards, certified with ISO 9001 and railway industry qualification.

Main Application Scenarios Railway wagon fastening, track connection, train brake system assembly and other railway infrastructure projects.

We support OEM customization, sample testing orders. MOQ and lead time can be negotiated based on your order quantity.