DIN 60SiCr7 spring steel strips 1-Standard:ASTM,JIS,DIN,BS 2-Surface treatment:annealed,polished,oiled 3-Grade:SUP7,60Si2Mn

DIN 60SiCr7 spring steel strips

1.Steel Surface Treatment:

Steel Sharp	Surface treatment
Round bar	Black /Grinding / Polished / Peeled / Turned
steel plate	Black / Milling / Machined

2.Chemical composition:

Chemical    composition	C	Ni	Mn	Cr	Cu	Si
%	0.56~0.6	≤0.35	0.6~0.9	≤0.35	≤0.25	1.50~2.0

3. Mechanical property

 

Tensil strength: σb (MPa): ≥1274(130)  

 

Yield strength: σs (MPa): ≥1176(120)

 

Elongation: δ5 (%):  ≥5 

 

Section contractibility rate ψ (%): ≥10

 

Ballistic work Akv (J):≥63

 

Notched bar impact strength αkv (J/cm2):≥78(8)

 

Hardness: ≤321HB   

 

Heat treatment regime: quenching 830°C, oil cooling; tempering 540°C+-30, hydrocooling, oil cooling.

 

4.Regular specification

 

round bar	diameter(mm)	length(mm)
	14~80	2000~5700
flat steel	thichkness(mm)	width(mm)	length(mm)
	15~500	205~1000	2000~6000

 

DIN 60SiCr7 spring steel strips