Rolling shutter door spring steel band,which is made with the best raw material by doing the process of cold rolled,annealed,heating treatment with hardened and tempered,and through controlling heating and colling process

steel strips shutter spring is made with hardened and tempered spring steel strip,which is use the best raw material ofck67,ck70,ck75,sae1070,1074 to produce it by an unique process through controlling heating and colling

Rolling shutter spring steel strip is made with hardned&tempered steel strip/coil are also commonly known as H&T steel strip.quenching and tempering is a thermal process that strenghen rolling shutter spring steel strips through controlling heating and coolling process

Tolerance on thickness:+/-0.03mm

Tolerance on width :+/-0.5mm

Tensile strength :>1450 Mpa

Package :each bundle with light oil and plastic film,then wrapped in anti-rust paper with metallic pallet 

Grade: ck67,ck70 ck75(SAE 1065, SAE 1070, SAE 1075)

Size:0.20-2.5mm*4-60mm

Hardness: 44-48hrc

Surface: gray blue, polished blue,...

Edge: rounded, slit

Coil weight: 200-250kg or as your requirement

Standard of surface: No flaw, burr, rust.

Yield Strees(Strength): 370-1175 N/mm2

Tensile Strength: 540-1275 N/mm2

Yellow Polished or golden band saw blade steel strips ,Over 10years experience in this industry,which is made of heat treatment with hardened and tempered process.it grew in great sucess and reputation for supply Yellow Polished or golden band saw blade steel strips to saw cutting industries.and also especially the material of CK75,51Crv4 is well received by the highter quality and more efficient cost.

ck75 high carbon spring steel strips for making band saw blade,which is made of heat treatment with hardened and tempered steel strips by throught controlling heating and coolling process.this type of  steel strip has good flatness,high degree of toughness and excellent spring properites,so that is the reason why it can be better for band saw blade,cuting tools,knife balde.etc

1.grade with DIN CK75,SAE1074,C75

2.size(thickness&width):1.1x110mmm,0.8x50mm,0.8x40mm,0.9x50mm,0.6x120mm,1.0x70mm,0.6x25 mm etc,the range of our thickness is 0.2mm to 2.5mm, and width is 10mm to 300mm.

3.hardness:44-46hrc

4.surface:bright polished

5.MOQ:3tons for trial order

1.grade with ck67,ck75.sk5

2.size(thickness&width):0.8 x 7mm, 0.8x 14mm, can be made accord to customer`s  request 

3.harness:45-50HRC, tolerance +/-2HRC for one coil  

4.edge:slit,no burr

5.application with auto wiper blade

grade with ck67,ck75.sk5

size(thickness&width):0.8 x 7mm, 0.8x 14mm, can be made accord to customer`s  request 

harness:45-50HRC, tolerance +/-2HRC for one coil  

edge:slit,no burr

application with auto wiper blade,Windshield Wiper Blade

1.grade with ck67,ck75.sk5

2.size(thickness&width):0.8 x 7mm, 0.8x 14mm, can be made accord to customer`s  request 

3.harness:45-50HRC, tolerance +/-2HRC for one coil  

4.edge:slit,no burr

5.application with auto wiper blade