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What is the approximate percentage of Si content in
transformer core(CRGO-Cold Rolled Grain Oriented)?
Why it is kept so low?

What is the approximate percentage of Si content in transformer core(CRGO-Cold Rolled Grain Orient..

Answer / iamdon

Si content in CRGO steel=(3-4.5)%

Higher Si content(greater than 5%) makes the core brittle which
is not desirable as it makes difficult for punching of core

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