ck67 ck75 Blue steel springs material

Our factory is produce Ck67 CK75 Blue Steel SpringS Material Over 10 years,which has the special man to responsible for every procudure of production line by controlling and inspection strictly.such as from first-rate raw material,cold rolled,annealed,heat treatment with hardened and tempered process,rouned edge ,etc,each production step,is checked carefullly in width,thickenss,hardness,edge,surface.At the same time,we have great knowledge that the flexibilty and mechanical properties is the key for steel springs when the door rolling down and rolling up and steel springs can't be broken when bending.so it will pay more attention to this. and Ck67 and CK75 is most popular for steel springs material  

 

80 x 1.40mm  50kg	55 x 1.20mm  26kg	45 x 1.20mm  18kg
60 x 1.40mm  39kg	55 x 1.00mm  18kg	45 x 1.00mm  15kg
60 x 1.30mm  34kg	50 x 1.40mm  28kg	40 x 1.40mm  19kg
60 x 1.20mm  29kg	50 x 1.30mm  25kg	40 x 1.20mm  16kg
60 x 1.10mm  23kg	50 x 1.20mm  21kg	40 x 1.00mm  13kg
60 x 1.00mm  19kg	50 x 1.00mm  17kg	30 x 1.00mm  10kg
55 x 1.40mm  33kg	45 x 1.40mm  24kg
55 x 1.30mm  29kg	45 x 1.30mm  21kg
shutter net weight	weight plus friction	spring number and measures
20kg	24kg	2              40x 1.00
30kg	36kg	2              45 x 1.20
40kg	48kg	2              60 x 1.10
50kg	60kg	2              60 x 1.20
60kg	72kg	3              60 x 1.10
70kg	84kg	2  6 0 x 1.20+1  55 x 1.20
80kg	96kg	3              60 x 1.20
90kg	108kg	2  60 x 1.40+1   60 x 1.20
100kg	120kg	4              60 x 1.20
110kg	132kg	4              60 x 1.30
120kg	144kg	2  60 x 1.40+2   60 x 1.30
130kg	156kg	4              60 x 1.40
140kg	168kg	4  60 x 1.30+2   40 x 1.20
150kg	180kg	4  60 x 1.30+2   50 x 1.20
160kg	192kg	4  60 x 1.40+2   45 x 1.20
170kg	204kg	4  60 x 1.40+2   60 x 1.10
180kg	216kg	4  60 x 1.30+2   60 x 1.20
190kg	228kg	4 60 x 1.40+2   60 x 1.30
200kg	240kg