The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 05, 2013
Filed:
Feb. 23, 2009
Masahide Kawabata, Moka, JP;
Masahide Kawabata, Moka, JP;
Hitachi Metals Ltd., Tokyo, JP;
Abstract
Heat-resistant, austenitic cast steel comprising by mass 0.3-0.6% of C, 1.1-2% of Si, 1.5% or less of Mn, 17.5-22.5% of Cr, 8-13% of Ni, 1.5-4% as (W+2Mo) of at least one of W and Mo, 1-4% of Nb, 0.01-0.3% of N, 0.01-0.5% of S, the balance being Fe and inevitable impurities, and meeting the following formulae (1), (2), (3) and (4):0.05≦(C—Nb/8)≦0.6  (1),17.5≦17.5Si−(W+2Mo)  (2),5.6Si+(W+2Mo)≦13.7  (3), and0.08Si+(C—Nb/8)+0.015Cr+0.011Ni+0.03W+0.02Mo<0.96  (4),wherein the symbol of each element corresponds to the amount (% by mass) of each element in the cast steel.