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CK75 blue tempered spring steel supplier

Spring steel is a low alloy, medium carbon steel or high carbon steel with very high yield strength. This allows objects made of spring steel to return to their original shape despite significant bending or twisting.
CK75 blue  tempered spring steel supplier
Spring steel is a low alloy, medium carbon steel or high carbon steel with very high yield strength. This allows objects made of spring steel to return to their original shape despite significant bending or twisting.
 
CK75 spring steel is a low alloy, carbon steel material with carbon content  0.72-0.84. This material can be heat-treated to the required tensile strength, operated by annealing process (CRCA) or hardened and tempered condition (Q+T). Process engineering of heat treament is very vital to the inherent quality of spring steel strip. The edge of CK75 spring steel can be rounded or slit.  Underd continous hardened (810-840`C) and tempered (300-500`c) facility, the finish surface can be blue,yellow,black,etc..
 
We also supply other following materials in hardened and tempered condition:
 

Delivery condition (strip,coil,sheet)

Grade based on DIN Standard

High quality heat treating steel strip, coil, sheet

supply capacity and condition

Hardness<20HRC

Hardness 29-55HRC

annealed

hardened and tempered

thickness

Width

thickness

Width

High carbon steel

CK50,CK55, CK60,CK67,

CK70,CK75,C75Cr1, SK5

0.15-2.5mm

8-600mm

0.15-2.5mm

8-300mm

Alloy spring steel

50CrV4, 51CrV4, 60Si2Mn

0.20-2.2mm

8-180mm

0.20-2.2mm

8-180mm

Stainless spring steel

3Cr13-6Cr13

0.20-2.5mm

8-150mm

0.20-2.5mm

8-150mm

Edge process

slit edge; both rounded; one side round, one side slit; square etc

Finish surface

polished (blue, yellow, white, grey-blue, black, bright) or Nature etc

Tolerance

thickness +/-0.03mm max; width +/-0.3mm max 

Physical Property

tensile strength - 450-1850N/mm2

 

Usage:
shutter door, plastic trowel, bricklay trowel, putty knives, scraper, springs, metal part, shoe insole, shoe accessories, blade, band saw blade for wood-cutting etc

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