STAINLESS STEEL FOR AUTOMOBILE EXHAUST MANIFOLD EXCELLENT IN PRODUCTIVITY, WORKABILITY AND HIGH TEMPERATURE STRENGTH AFTER HIGH TEMPERATURE LONG TIME AGING

Title:

STAINLESS STEEL FOR AUTOMOBILE EXHAUST MANIFOLD EXCELLENT IN PRODUCTIVITY, WORKABILITY AND HIGH TEMPERATURE STRENGTH AFTER HIGH TEMPERATURE LONG TIME AGING

Document Type and Number:

Japanese Patent JP3364322

Kind Code:

B2

Abstract:

PURPOSE: To produce a stainless steel for an automobile exhaust manifold excellent in productivity, workability and high temp. strength by preparing a stainless steel having specified chemical components in which the contents of Nb, Ta and Zr are prescribed.
CONSTITUTION: A stainless steel having a compsn. contg., by weight, ≤0.02% C, 0.4 to <1.0% Si, ≤1.0% Mn, ≤0.04% P, ≤0.03% S, ≤0.015% Al, 10 to 20% Cr, ≤0.02% N, ≤0.5% Nb, 0.02 to 1.5% Ta so as to satisfy ≤0.5% in total of Nb and Ta and 0.01 to 0.15% Zr, contg. C, N and Zr so as to satisfy the inequality Zr%/91≤C%/12+N%/14, and the balance iron with inevitable impurities is prepd. Thus, the stainless steel for an automobile exhaust manifold excellent in high temp. strength after high temp. long time aging and excellent in workability and productivity can be obtd.

Inventors:

Masaya Tada
Atsushi Miyazaki

Application Number:

JP12222694A

Publication Date:

January 08, 2003

Filing Date:

June 03, 1994

Export Citation:

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Assignee:

Kawasaki Steel Co., Ltd.

International Classes:

C22C38/00; C22C38/28; (IPC1-7): C22C38/00; C22C38/28

Attorney, Agent or Firm:

Nobuto Watanabe (1 person outside)

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