Analysis and discussion of inland and overseas cold roll electric steel dimension tolerance

IEC standards are introduced by most industrialization countries to constitute their own country standards of cold roll electric steel.In the same situation of iron waste and magnetic induction, dimension tolerance is the most index of evaluating the level of standards and electric steel quality.By the compare of dimension tolerance in IEC,Europe,Japan,China,US standards,we elicit: the same plate difference of grain orientated silicon steel,in IEC,Europe,Japan,China standards is the same;in US standards is stricter.The same plate difference of non-grain orientated silicon steel,in US standards is the largest, in China,Japan standards is the medium,in IEC,Europe standards is the smallest.The cross direction thickness difference of grain orientated silicon steel,in IEC,Europe standards is 0.010mm stricter than in China,Japan standards;in US ASTM isn't prescribed.The cross direction thickness difference of non-grain orientated silicon steel,in IEC,Europe standards is stricter,in China,Japan standards is looser,in US standards isn't prescribed.The width difference,in IEC,Europe standards is the smallest,in US standards is the largest,in China, Japan standards is the medium.