Stainless steel is the abbreviation of stainless steel, which has good corrosion resistance and high hardness, and is widely used. So what are the materials it is made of? Here is a brief introduction. 1. DDQ (deep drawing quality) material: it is used for deep drawing (punching)
Stainless steel is the abbreviation of stainless steel, which has good corrosion resistance and high hardness, and is widely used. So what are the materials it is made of? Here is a brief introduction.
1, DDQ (deep drawing quality) material: refers to the stainless steel material used for deep drawing (flushing), that is, the stainless steel soft material, the main characteristics of this material is high elongation (≧53%), low hardness (≦170%), the internal grain grade is between 7.0 and 8.0, and the deep drawing performance is excellent. Many enterprises that produce thermos bottles and POTS, the processing ratio of their products (BLANKING SIZE/ product diameter) is generally relatively high, and their processing ratios reach 3.0, 1.96, 2.13, and 1.98, respectively. SUS304DDQ materials are mainly used for these products that require a higher processing ratio, of course, products with a processing ratio of more than 2.0 generally need to be completed after several stretches. If the extension of raw materials can not be reached, the phenomenon of cracking and pulling through is easy to occur in the processing of deep-drawn products, which affects the qualified rate of finished products, and of course increases the cost of manufacturers;
2. General materials: Mainly used for stainless steel materials other than DDQ use, this material is characterized by relatively low elongation (≧45%), and relatively high hardness (≦180HB), internal grain size grade between 8.0 and 9.0, compared with DDQ material, its deep drawing performance is relatively poor, it is mainly used for products that can be obtained without stretching. Like a type of tableware spoon, spoon, fork, electrical appliances, steel pipe use. However, it has an advantage compared with DDQ materials, that is, the BQ property is relatively good, mainly due to its slightly higher hardness.
