①DDQ (deep drawing quality) material: refers to the material used for deep drawing (red), that is, we said that the soft material, the main features of this material is a higher elongation (≧ 53%), hardness Low (≦ 170%), the internal grain grade between 7.0 to 8.0, deep drawing performance is excellent. Many of the production of thermos bottles, pots of enterprises, the processing of their products than (BLANKING SIZE / product diameter) are generally higher, their processing than the respectively, 3.0,1.96,2.13,1.98. SUS304DDQ timber is mainly used for these requirements of the higher processing than the product, of course, more than 2.0 products generally need to go through a few times before the stretch to complete. If the raw material extension can not reach the case, in the processing of deep drawing products when the product is easy to produce cracks, pull the phenomenon of wear, affecting the finished product pass rate, of course, increased the cost of the manufacturers;

② General material: mainly used in addition to DDQ use of the material, this material is characterized by a relatively low elongation (≧ 45%), while the hardness is relatively high (≦ 180HB), the internal grain size of 8.0 ~ 9.0 Compared with DDQ, its deep drawing performance is relatively poor. It is mainly used for products that can be obtained without stretching. It is like a spoon, spoon, fork, appliance, steel pipe and so on. But it has an advantage compared with the DDQ material, that is, BQ is relatively good, mainly because of its hardness slightly higher reason.