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...Equivalent grades alloy steel internal standard bs din is en sae aisi a cr m crnimo nicrmo enc crmo end ena nivcrmo c mn mncr filesteel enb scm carbon jis ck cmn smn high pc swrhb pccr pck pckcrv r sup rm cda spring si supv sicr simn crv supn supa b bearing quality enm cold heading chq saechq swrcha...