In fact, many times we don't care about the tensile coefficient of stretching parts. In fact, this is incorrect. Why do we have the concept of tensile coefficient? It must be the value of our value, but we have not noticed it ourselves. Next, we will tell you how to calculate the tensile coefficient of our stretching parts by the small knitting of our central and southern stretching parts. The formula for calculating drawing coefficient is m total = dn / d0, m total = m1m2... Mn in which DN is the final diameter of the drawing part and d0 is the diameter of the blank. M1, m2 and Mn are the coefficients of each drawing. Here we would like to remind you that the selection of each drawing coefficient is also selected according to the table, such as stainless steel (0Cr18Ni9Ti) first drawing coefficient is only 0.52-0.55, after each drawing coefficient is the lowest 0.78-0.81. Here we want to remind you that we can calculate the drawing height of each process, according to the actual situation, we can choose different calculation formulas. Now with the rapid development of our deep drawing technology, the advent of new deep drawing technology and equipment can further reduce our tensile coefficient.