| 摘要 |
A raw material for a shadow mask comprising a cold rolled steel sheet having a chemical composition: C: </= 0.0008 wt %, Si </= 0.03 wt %, Mn: 0.1 to 0.5 wt %, P: </= 0.02 wt %, S: </= 0.02 wt %, Al: 0.01 to 0.07 wt %, N: </= 0.0030 wt %, B: 0.5 </= B/N </= 2, balance: Fe and inevitable impurities; a method for producing the material; a shadow mask using the material; and a picture tube using the shadow mask. The material has magnetic properties which are excellent and also homogeneous in a coil. |
