304 stainless steel pipe and some magnetic some non magnetic, what reason is this? Rumor 304 stainless steel pipes with 304 stainless steel tubing magnetic is not in line with national standards, through a non-magnetic stainless steel tube to judge good or bad is not scientific! Stainless steel magnetic or non-magnetic can be according to customer demand production and processing, will be 304 stainless steel wires by annealing processing and then in the water tank after demagnetization instrument warm water to magnetic vibration can become a non-magnetic stainless steel tube.