Crack of ASTM A53 Seamless Steel Pipe

ASTM A53 seamless steel pipe crack cause:
First of all, most of the reasons for tube (circle) include internal cracks, inclusions, air bags and so on. The uneven organization of the pipe is the reason. We should pay attention to the implementation of the standard of pipes, and the bar manufacturers with a certain scale will do that.


Secondly, piercing temperature and technological adjustment can not be ignored. If the piercing temperature is low, improper adjustment will cause capillary internal tissue tear.


Third, the final annealing temperature is suitable. The heating temperature of perforation is 1180 ~ 1230 C, which is low, which is the temperature of carbon steel and 1230-1250. The furnace time is generally more than 60min