Ferritic stainless steel for heat exchanger
AssigneesTokyo Radiator Mfg. Co., Ltd., Nippon Yakin Kogyo Co., Ltd., Nissan Motor Co., Ltd.
InventorsYoshito Fujiwara, Yutaka Kobayashi, Mituo Kimura, Masatoshi Iio, Tohsaku Takamura
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Abstract
A ferritic stainless steel comprises C: not more than 0.025 wt %, Si: not more than 0.10 wt %, Mn: not more than 1.0 wt %, Cr: 17.0-25.0 wt %, Ni: not more than 0.50 wt %, Mo: 0.50-2.00 wt %, Al: not more than 0.025 wt %, N: not more than 0.025 wt %, at least one of Nb: 10(C wt %+N wt %)-1.0 wt % and Ti: 10(C wt %+N wt %)-1.0 wt %, and the balance being substantially Fe and inevitable impurities and is effectively used in various heat exchangers.
Claims1
A ferritic stainless steel for heat exchangers consisting essentially of:
- not more than 0.015 wt % of C;
- not more than 0.05 wt % of Si;
- not more than 1.0 wt % of Mn;
- 18.0-20.0 wt % of Cr;
- not more than 0.50 wt % Ni;
- 0.70-1.00 wt % of Mo;
- not more than 0.020 wt % of Al;
- not more than 0.015 wt % of N;
- at least one of Nb in an amount of 15(C wt %+N wt %)-0.7 wt %, and Ti in an amount of 15(C wt %+N wt %)-0.7 wt %;
- and
- a balance of substantially Fe and inevitable impurities.
Dependencies are inferred from the claim text.