Crack of ASTM A53 Seamless Steel Pipe

Causes of ASTM A53 seamless steel tube crack:
First, the reasons for the tube (round) mostly, the internal contains more cracks, inclusions, air bags and so on. Uneven organization of the tube is the reason, pay attention to the choice of the implementation of tube standard, there is a certain size of the manufacturer of the round bar on the line.

Second, the perforation temperature, process adjustment can not be ignored, if the piercing temperature is low, improper adjustment, can also cause the tearing of the capillary tube internal organization.

Third, the finish annealing temperature is suitable. Perforated heating temperature 1180 ~ 1230 ℃, low, this is the temperature of carbon steel, take 1230-1250 was appropriate. Furnace time is generally more than 60min