Type IV track fastener system for ballast railway’s sleeper without pre-casting concrete shoulder, which is composed of C4 clip(joint point JA, JB type clip), type IV pre-inset iron shoulder, insulated gauge plate and rubber pad.
Type fastener system is used for 60kg/m steel rail high speed ballast track:
1）Design for 350km/h high speed railway with Max. axle loading 170KN
2）Design for 250km/h high speed railway with Max. axle loading 170KN, alternative for conventional passenger train with loco Max. axle loading 230kN, as well as few freight train with Max. axle loading 230KN.
1）、Clamping force per rail seat≥20KN;
2）、Each rail seat’s longitudinal resistance is more than 9KN;
3）、Fastener system should be in good condition after bearing 3 million times loading circulation, the gauge expansion should be less than 6mm;
4）、Gauge insulated resistance should be bigger than 3 Ω•km, meeting the insulated electric resistance requirement of track circuit.
5）、System elasticity: Rubber pad static rigidity is 60 kN/mm（±10 kN/mm）)
6）、Fastener passes the 300h corrosion test under the regulation of EN 13146-6, it can be dismantled by manual tools.
7）、Single rail left-right adjustment: －4～＋2 mm，gauge adjustment：－8～＋4 mm;
8）、Pre-inset iron shoulder anti-pulling strength should be no less than 60kN.