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DIN 17222

DIN 17222

DIN 17222 Alloy Steel
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DIN 17222 Alloy Steel



Material Name


Material Name: DIN 17222

Characteristics and scope of application


Spring steel DIN 17222 55Si7 is a kind of pre-hardened material well suited for fabrication requiring shaping by blanking, bending, drawing, extrusion and swaging. Spring steel DIN 17222 55Si7 allows for closer dimensional tolerances and improved finish and available in several grades. Grade selection is important when considering higher levels of wear resistance.
DIN 17222 55Si7 spring steel has higher strength and elastic limit and higher relaxation ability,good temper resistance.mainly used for the production of  spiral spring, butterfly spring, air seal spring,which work under less than 250 degrees, high pressure, deformation load conditions.

Chemical Composition


C Si Mn Ni
 Cu
 S P Cr
0.52-0.60 1.50-2.00 0.60-0.90 Max 0.35
 Max 0.25
 Max 0.035 Max 0.035
 Max 0.35

Mechanical Properties


Tensile strength
σb (MPa) 		Yield Strength
σs 0.2 (MPa)
Elongation
δ 5 (％)
reduction of crosssection area
ψ (％)
 ballistic work
Akv (J)
Hardness
（HB）
specimen size
Min 1080 Min 930 Min 12 Min 45
 Min 63
 Max 217 25mm

Delivery State


annealed state delivery, the delivery state should be indicated in the contract.