ASTM A213 / ASME SA213 Stainless Steel Precision Seamless Tube, S30400 /30403 For Food Industry

BA-6-0016

1 . Annealing of mother tuber ensures :
A) Removal of stress induced during tube forming and cold drawing
B) Sufficient ductility and softness for cold drawing
C) Transformation of the weld zone to austenitic nature
D) Re crystallization of metallic grains to original form and thereby improving corrosion resistance

2 . The tubes are then coated with proper lubricant and then cold drawn over a drew bench
1) To vary the metallurgical structure and restore the properties to the parent material
2) To achieve a tube having closer dimensional tolerances
3) To produce tubing of smaller size and wall thickness
4) To reorient the grain structure of weld portion with that of the parent material
5) To remove/minimize the internal bead