Hi Blacksmith37, many thanks for your reply. I agree with your answer, the Miu taper and radius are the most important features of the upset. The external upset is very small. Also Quench and Temper does change the grain to a fine martensite structure. However today we have many 3rd parties...
Our plant forges drill pipe (seamless rolled tube) ends to make and upset ready for friction welding to a connector that joins several pipes. The forged upset has to meet specific dimensions and have generous tapers and radii from the upset to the the original pipe body. See attachment. The...
