What is an acceptable level of residual magnetism in steel plate
What is an acceptable level of residual magnetism in steel plate
(OP)
We have a contractor who is producing 1.625 in. to 1.875 in. thick steel plate for a very large pressure vessel, Height 215.4 ft. Diameter, 130 Ft. with elliptical heads. They are using magnetic lifting devices after the forming process to move & transport the plates. The Base Material is SA738,Gr.B . Our client is concerned about residual magnetism in the plates affecting the welding of the plates together. What is an acceptable level of residual manetism that will not cause welding problems?





RE: What is an acceptable level of residual magnetism in steel plate
The rule of thumb we use is 3G or less is considered demagnetized which is what is listed in ASTM E-1444.
JR97
RE: What is an acceptable level of residual magnetism in steel plate
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04