DDQ (deep drawing quality) material.
Is used for deep drawing (punching) purposes of the material, that is, what we call soft material, the main characteristics of this material is a high elongation (≧ 53%), lower hardness (≦ 170), internal grain grade in 7.0 ~ 8.0 between, deep punching performance is excellent. At present, many production of thermos bottles, pots and pans, the processing ratio of its products (BLANKING SIZE / product diameter) are generally higher, their processing ratio of 3.0, 1.96, 2.13, 1.98. SUS304 DDQ with material is mainly used for these requirements of higher processing ratio of products, of course, processing ratio of more than 2.0 products are generally required after several times of stretching to complete. If the extension of the raw material can not reach, in the processing of deep-drawn products, the product is very easy to produce cracks, pull through the phenomenon, affecting the finished product qualified rate, of course, also increased the cost of manufacturers.
General material is mainly used for materials other than DDQ uses.
This material is characterized by relatively low elongation (≧ 45%), and relatively high hardness (≦ 180), internal grain size grade in 8.0 ~ 9.0 between, and DDQ with the material comparison, it is relatively poor deep punching performance, it is mainly used without stretching can be obtained products, such as a class of tableware spoon, spoon, fork, electrical appliances, steel pipe use. However, it has an advantage over DDQ material in that the BQ properties are relatively good, mainly due to its slightly higher hardness.