Railway screw spikes are made of 35 steel, offering high strength and good toughness, and are suitable for high speed railways, heavy haul freight lines, and urban transit tracks. DIN standard grade 5.6 screw spikes are primarily used for fastening steel rails to wooden or concrete sleepers, and are compatible with spring washers, rail clip systems, and plastic guide inserts to ensure long term track stability. Surface treatments include oxidation, zinc plating, or hot dip galvanizing to enhance corrosion resistance.
Grade 5.6 Properties and Materials
Grade 5.6 means the screw spike has a minimum tensile strength of 500 MPa and a minimum yield strength of 300 MPa, with an elongation of 20 percent or more. Raw materials for the Ss series include Q235, 35 steel, 45 steel, 40Mn2, and 20MnSi, and the available grades are 4.6, 4.8, 5.6, and 8.8. All grades pass a 90 degree cold bending test without cracks, which confirms the material is ductile enough for installation by impact tools.
Ss Series Sleeper Screws
| Type | Specification | Weight kg |
| Ss1/130 | M22 by 130 mm | 0.451 |
| Ss1/150 | M22 by 150 mm | 0.478 |
| Ss2/180 | M22 by 180 mm | 0.595 |
| Ss5/150 | M24 by 150 mm | 0.545 |
| Ss6/150 | M26 by 150 mm | 0.702 |
| Ss7/180 | M24 by 180 mm | 0.636 |
| Ss8/140 | M24 by 140 mm | 0.528 |
| Ss8/150 | M24 by 150 mm | 0.548 |
Surfaces are natural, zinc, paint, or oil according to customer needs, and standards include UIC, AREMA, and GB, or production to customer drawings.
Square Head and Hexagon Screw Spikes
Square head screw spikes have a square head on one side and a screw thread on the other. Common sizes are M22 by 145, M22 by 155, M22 by 165, M22 by 185, and M22 by 195, with materials such as 45 steel, 55Q, and Q235. Finishes include natural, zinc, paint, and oil, and the standards cover UIC, AREMA, DIN, and GB. The square head is driven with a wrench and seats positively on the tie plate.
| Grade | Material | Tensile Strength | Yield Strength | Elongation |
| 4.6 | Q235 | 400 MPa or more | 240 MPa or more | 22 percent or more |
| 5.6 | 35 steel | 500 MPa or more | 300 MPa or more | 20 percent or more |
| 8.8 | 45 steel | 800 MPa or more | 640 MPa or more | 12 percent or more |
| 10.9 | 40Cr | 1000 MPa or more | 900 MPa or more | 9 percent or more |
Hexagon screw spikes include sizes from M22 by 145 to M22 by 195 and are installed with a socket wrench. Available surfaces are plain oiled, oxide black, zinc, hot dip galvanizing, wax, bitumen, dacromet, and sherardizing.
Double-Head Screw Spikes
Double-head screw spikes have screw heads on both ends and are often used in fastening systems popular in Africa. To meet the strict bending requirement, special raw material is applied so that the spike can be straightened without cracks after bending 30 degrees or more. The common size is 23 mm by 174 mm, in grades 4.6 to 10.9, with raw materials of Q235, 35 steel, and 45 steel, and finishes of plain oiled, bluing, zinc, and hot dip galvanizing.
Standards and Supply Flexibility
The factory supplies various standards of railway screw spikes manufactured with international standards such as BS, ASTM, and DIN. Any quantity is viable, large or small, and a range of finishes is offered, including hot dipped galvanized, black, sherardized, and self color for budget-conscious projects. Extensive experience in the rail industry supports correct selection of grade, finish, and packaging.
Frequently Asked Questions
What does grade 5.6 mean for a screw spike? Grade 5.6 means a minimum tensile strength of 500 MPa, a minimum yield strength of 300 MPa, and an elongation of 20 percent or more.
Which material is used for DIN standard grade 5.6 spikes? The spikes are made of 35 steel, with Q235, 45 steel, 40Mn2, and 20MnSi available for other grades.
What sizes are available in the Ss series? Sizes range from M22 by 130 mm to M26 by 150 mm, including the common M24 by 150 mm Ss8.
What is the double-head screw spike used for? Double-head screw spikes are used in fastening systems popular in Africa, with a common size of 23 mm by 174 mm.
Which standards can be supplied? Standards include UIC, AREMA, DIN, GB, BS, and ASTM, or production to customer drawings.
