①DDQ (deep drawing quality) material: refers to the material used for deep drawing (red) purposes, which is what we call the soft material, the main features of this material is a high elongation (≧ 53%), hardness Low (≦ 170%), the internal grain level between 7.0 to 8.0, deep drawing performance is excellent. Many of the production of thermos bottle, pot type of business, their products processing ratio (BLANKING SIZE / diameter products) are generally higher, their processing ratio of 3.0,1.96,2.13,1.98 respectively. SUS304DDQ timber is mainly used for these requirements higher processing than products, of course, processing more than 2.0 products are generally required to go through a few passages of stretching to complete. If the extension of raw materials to reach, then deep-drawing products in the processing of products prone to crack, pull through the phenomenon, affecting the finished product pass rate, of course, increased the cost of manufacturers;
② general material: mainly used in addition to DDQ use of materials, this material is characterized by a relatively low elongation (≧ 45%), while the hardness is relatively high (≦ 180HB), the internal grain size rating of 8.0 to 9.0 Compared with the DDQ material, its deep-drawing performance is relatively poor, it is mainly used for products without stretching can get, like a tableware spoon, spoon, fork, appliances appliances, steel use. But it is compared with the DDQ material has an advantage that BQ is relatively good, mainly due to its slightly higher hardness of the reason.