In the spring steel alloy, elements of silicon, manganese, chromium, vanadium and molybdenum are used in appropriate quantities and according to the properties of spring steels. Spring alloy steels have acceptable tensile strength.

This steel has anti-wear properties. The presence of silicon in spring steel increases the elasticity and the presence of chromium increases the strength and corrosion resistance.

The presence of elasticity in spring steel helps to be able to deform to a suitable level in conditions when the steel is under high pressure, and also this capability causes the tensile strength in these steels to increase significantly.

1.8159 spring alloy steel is used in the production process of multilayer springs – flat helix, torsion shaft springs and spring belts (belts up to 30 mm thick and round to 40 mm in diameter) and for high temperature work ( Up to about 300 ° C) is also suitable.

Spring alloy steel – 1.8159 steel

One of the disadvantages of 1.8159 steel is its very low welding capability due to its high carbon content and risk of cracking. But in contrast, this steel has a high hardness capability.

Ck75 spring alloy steel with standard number 1.1248 is used to provide springs with dimensional accuracy and high quality.

Chemical composition of CK75 spring steel (% by weight)

Other	W	V	Ni	Mo	Cr	Mn	Si	C
_	_	_	_	_	_	0,7	0,25	0,75

Among the spring steels widely used in industries from which spring belts are also produced, we can mention Ck60 or 1.1221 and Ck70 steels.

Chemical composition of CK60 spring steel (% by weight)

W	V	(Ni (max	(Mo (max	(Cr (max	Mn	(Si (max	C
_	_	0,4	0,1	0,4	0,75	0,4	0,61

Spring alloy steel – 1.8159 steel

A special type of spring alloy steel that has 15.64% chromium, 4.38% nickel, 2.68% molybdenum, 1% manganese, 0.32% silicon, 0.12% copper and 14% carbon, in the manufacture of engine springs Jets and other items that require high heat resistance are used.