Process and Quality

A spring is a flexible component designed to absorb mechanical energy. A length of compression springs reduces under loading conditions.

We produce cylindrical heavy-duty compression springs of up to 1,600 mm length made of 10-70 mm diameter rods. This range covers almost all springs for railroad, motor vehicle, agricultural, special vehicle, oil and gas pipeline applications.

Springs produced as a part of a project feature improved strength, endurance and geometrical accuracy due to unique, unparalleled anywhere in the world technology applied.

A hot coiling process is used to produce heavy-duty springs. This is the only way to coil railroad springs of large-diameter rods.

The process is based on a combined high-temperature thermomechanical treatment – a well-known method of steel mechanical properties improvement. Additionally, local small deformations are created to form nano-sized substructures contributing to the strength performance of springs.


Unique features of the technology:

  • steel structure is more homogeneous, with higher dislocations concentration and nano-sized subgrains;

  • smaller (as compared with a conventional process) particles of uniformly distributed carbide – cementite;

  • nanosubstructure with low-angle boundaries is created inside a grain;

  • average size of substructural element of a ferrite matrix is 20-40 nm, and the range of sizes is within 20-100 nm.
Due to all these unique features, we can produce second to none springs.

The main material for springs production is high-carbon and alloyed steels.

Independent tests of heavy-duty springs produced as per the proprietary production process performed by the Ural division of the All-Russian Research Institute for Railroad Transport demonstrated:

01 At least 10 times improved cyclic fatigue life.

02  At least 5 times better relaxation resistance.

03 35-40% higher allowable working stress.