Difference in SS201 J1 J2 J3 J4 J5

Many times my cliets tell me they want SS201 material for their products, but they seldom mention about which detial level.

That's why often ask our clients where the material is used, then we can provide them the right grade.

J1: It has slightly higher carbon content than J4 and lower copper content than J4. Its workability is inferior to J4. It is suitable for ordinary shallow drawing and deep drawing products with large angle types, such as decorative plates, bathroom products, sinks, tubing, etc.J2 and J5: They are still good for simple processing in decorative tubes because of their high hardness (above 96°), and the polishing is quite beautiful. However, they are prone to cracking when used in square tubes or bent tubes (90°).

In terms of flat plates, due to the high hardness, the plate surface is beautiful, and surface treatments such as sandblasting, polishing and plating are acceptable. But the biggest problem is bending. Bending is easy to break, and slotting is easy to burst, so the ductility is poor.J3: It contains high carbon, low chromium and low copper. However, due to its high carbon content and low copper content, the material is slightly harder. Therefore, it is not suitable for bending with slightly higher strength. Compared with 201 stainless steel J1, its ductility is not as good, and it is more prone to rust in the same environment.

In the narrow strip field, the emergence of 201 stainless steel J3 is more to meet the needs of pipe enterprises for corrosion resistance and deformation requirements that are not particularly high. Because it can reduce the raw material costs of pipe enterprises, it has been sought after by pipe enterprises in the narrow strip field.J3 can be easily processed for decorative plates, but more difficult. Some skilled workers have said that using J3 steel to cut and bend plates will have internal seams after breaking (for black titanium, colored plates, sandblasted plates, breaking and bending out internal seams). Sinks have been tried for bending, 90 degrees is OK, but not continuous.?J4: J4 is a high-end product in the 201 stainless steel J series. It is suitable for small-angle deep drawing products. Most deep drawing and stretching products requiring salt spray testing will choose it. Such as sinks, kitchenware, bathroom products, kettles, vacuum flasks, door hinges, pots, etc.?