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By certification 
1. Product Description
Products are mainly used in: electromagnet pole head, end welded tube in magnetron, earphone vibration film, torque motor rotor, magnetostrictive transducer core, etc.
2. Product Superiority
Mainly reflected in the quality of stability and product professionalism. Our cooperative production base has produced China's first batch of precision alloy product. All China's precision alloy production technology is exported from here. The main process of this product lies in the hot rolling process and quenching process.
3. Chemical Component
The chemical composition shall comply with table 1.
Table 1 Chemical Component
Grade of steel |
Element Content (%) |
|||||||||
C |
Mn |
Si |
P |
S |
Ni |
Co |
Cu |
V |
Fe |
|
1J22 |
≤0.04 |
≤0.30 |
≤0.30 |
≤0.020 |
≤0.020 |
≤0.50 |
49.0~51.0 |
≤0.20 |
0.80~1.80 |
Balance |
4. Size And Allowable Deviation
The size and allowable deviation of cold rolled strip shall be in accordance with table 2 and table 3.
Table 2 Allowable deviation of cold rolled strip thickness
Unit: mm
Nominal thickness |
Thickness and allowable deviation |
Nominal width |
Nominal length, no less than |
≥0.10~0.15 |
-0.02, 0 |
60~200 |
3000 |
＞0.15~0.25 |
-0.03, 0 |
60~200 |
900 |
＞0.25~0.40 |
-0.04, 0 |
60~200 |
450 |
＞0.40~0.70 |
-0.05, 0 |
60~200 |
450 |
＞0.70~0.95 |
-0.07, 0 |
60~200 |
400 |
＞0.95~1.35 |
-0.08, 0 |
60~200 |
400 |
＞1.35~1.75 |
-0.11, 0 |
60~200 |
400 |
＞1.75~2.30 |
-0.13, 0 |
60~200 |
400 |
＞2.30~3.00 |
-0.16, 0 |
60~200 |
400 |
Table 3 Allowable deviation of the width of cutting edge strip
Unit: mm
Nominal thickness |
Nominal width |
|
≤100 |
＞100 |
|
Allowable deviation | ||
0.10~0.50 |
±0.1 |
±0.15 |
＞0.50~1.00 |
±0.15 |
±0.20 |
＞1.00 |
±0.25 |
±0.30 |
5. Appearance
5.1 Cold rolled strip is usually delivered in rolls. The edges shall be free of cracks and burrs exceeding the allowable tolerance of thickness.
5.2 Cold rolled strip shall not have curved and obvious waves . The sickle bend shall not be greater than 3mm per meter.
6. Smelting Process
The products are smelted by vacuum induction furnace.
7. Delivery State
The product is delivered in cold rolled condition. Finished products are not heat-treated.
8. Magnetic Property
The magnetic properties of the samples after heat treatment shall meet the requirements in table 4.
Table 4 Magnetic properties of samples after heat treatment
Grade of steel |
The intensity of magnetic induction at different magnetic field strengths（A/m） |
Coercivity Hc/ (A/m) |
|||||
B400 |
B800 |
B1600 |
B2400 |
B4000 |
B8000 |
||
T | |||||||
No Less Than | |||||||
1J22 |
1.70 |
1.90 |
2.00 |
2.10 |
2.20 |
2.25 |
≤110 |
9. Surface Quality
The surface of cold-rolled strip should be smooth and clean. Slight heterochromia and depth defects not exceeding the thickness allowance are allowed.
10. Company Qualification
We have passed the quality management system certification of GB/T 19001-2016/ISO9001:2015.
11. About us
Our products are trustworthy.
http://www.specialsteelcn.com/
