抄録
A comparison of US and Japanese produced Automotive springs was made regarding the following:
1. Material used
2. Quality and Grade of steel
a. Incidental alloying elements
b. Non-metallic inclusions
c. Grain size
3. Scale and Decarburizing
Results of comparison were follows:
1. US springs were made of Silicon-Manganese steel, Chromium steel and Molybdenum steels, but Japan mades were chiefly of Silicon-Manganese steels.
2. The quality and grade of steels used for US springs were superior to those of Japan make.
3. Scale and decarburizing on surfaces of US spring could not be observed, but they were usually observed on surfaces of Japanese springs.
