Kawasaki Steel Corporation

Toshiaki Shiraishi

Toshihiko Emi

Shinobu Okano

Hiroshi Ooi

Shuji Watanabe

Toshio Iwasaki

Osamu Haida

Akitoshi Fujiwara

Noboru Okamoto

Steel materials having an excellent hydrogen induced cracking resistance when used under atmosphere containing H.sub.2 S, which contain 0.05 to 0.20% of C, 0.01 to 0.50% of Si, 0.60 to 2.00% of Mn, 0.01 to 0.10% of Al, less than 0.0020% of S, Ca of 0.0020% to less than 0.0050%. These steel materials are increased in the tensile strength by additionally containing at least one of Cu, Ni, Cr, B, Mo, Nb, V, Zr and Ti. Furthermore the effect of addition of Ca is stabilized by adding rare-earth elements.

Steel materials having an excellent hydrogen induced cracking resistance

Growing community of inventors

Chiba, Japan

Toshiaki Shiraishi