抄録
The effect of Cr, Fe, Si, Mn or Zr on the some properties of 52S alloy sheets was investigated. The results obtained may be summarized as follows;
1) The resistance of stress corrosion of the specimens, contained less than 0.2%Cr, was inferior and resistance of corrosion (un-stress) of the specimens, contained above 0.3%Cr, was also similar.
2) The resistance of corrosion decreased gradually with increasing of the content of Fe or Si.
3) The specimens, contained 0.6%Fe, have higher value of tensile strength and hardness, but that, contained 0.6%Si, have lower one.
4) By addition of small amount of Mn or Zr, the tensile strength and hardness increased. 5) At the specimens, contained 0.9%Mn or 0.5%Zr, the tensile strength and hardness scarecely decreased by heating.
6) The casting structure of 52S alloy become very fine by addition of 0.5%Zr.
