Problem during bending pipes ,, downgrading?

i'm forming high grades Low carbon steel pipes into bends ( elbows) using induction hot coils , i don't know how to maintain the yield and tensile strenght because everytime after bending the test result of the bent area illustrate lower grade. any suggestions???


forming temp. 910 C


quenching using water directly during bending operation


low aloy steel


carbon is 12% Max.


mother pipe Grade is API X70 and the bend may be X56 or X60

Problem during bending pipes ,, downgrading?
Quenching using water directly during bending operation is better for stainless steel grade material.You have not mentioned the detail of water quenching methode. When you are forming bends and using induction heating coil THEN you have to follow the proper heat treatment after the forming for that particular grade.


pl. visit:


http://www.inductionbending.co.uk/servic...


or any other website

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