| 1.grade | ck55 ck60 ck67 ck70 ck75 sae1055 sae1060 sae1070 sae1074 60Si2Mn 50CrV4 |
| 2.Technique | cold rolled ,annealed ,hardened and tempered |
| 3.hardness | 18-30HRC |
| 4.color | blue |
| 5.surface | polish,polish blue,grey-blue,unpolish |
| 6.edge | round,mill,slit,one side is round or one side is slit |
| 7.thickness | 0.2-2.5mm |
| 8.width | 8-300mm |
| 9.tolerance on thickness | max+/-0.01mm |
| 10.tolerance on width | max+/-0.05mm |
| 11.length | strip coil |
| 12.coil ID | 400-500mm |
| 13.coil OD | 800-1000mm |
| 14.tensile strength | 540-1275N/mm2 |
| 15.yield strength | 370-1175N/mm2 |
| 16.application | metal shoes accessoy(shoes shank,shoes insole,toe cap) |
| 17.package |
1)each boundle with anti-rust paper and light oil 2)then wrapped in plastic film and put in 20ft container for standard sea worthy |
Quality control
How should quality control be organized?
there are 3 satges of operaton in the control quality
1)raw material
the acceptance or rejection of raw material is normally the duty of the analytical chemists Dept,their duty is to decide whether the material is good or not,inspection is usually combined with sampling and is the most important part of raw material inspection.
2)process of manufacture
GWYL is a professional and original producer and exporter over 10 year,it has the best skilled experts and compelte equipment to product high carbon spring steel strip,controlling every production line
3)inspection of the finished product :QC control strictly,all the order of the finished product is inspected by the QC,including check the surface,hardness,thickness,width,edge,ipackage and so on.if not meet the customer's requirement by inspected,it will be not pass and reproduct.
