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:
Sep. 19, 2017
Filed:
May. 09, 2013
Heat-resistant, austenitic cast steel having excellent machinability and exhaust member made thereof
Hitachi Metals, Ltd., Tokyo, JP;
Kana Morishita, Matsue, JP;
Kenichi Inoue, Matsue, JP;
Susumu Katsuragi, Moka, JP;
Masahide Kawabata, Moka, JP;
Tomonori Sakuta, Miyako-gun, JP;
HITACHI METALS, LTD., Tokyo, JP;
Abstract
A heat-resistant, austenitic cast steel having excellent machinability comprising by mass 0.4-0.55% of C, 1-2% of Si, 0.5-1.5% of Mn, 18-27% of Cr, 8-22% of Ni, 1.5-2.5% of Nb, 0.01-0.3% of N, 0.1-0.2% of S, and 0.02-0.15% of Al, the balance being Fe and inevitable impurities, a machinability index I represented by the following formula: I=100×S+75×Al+0.75×Mn−10×C−2×Nb−0.25×Cr−0.15×Ni−1.2×N, wherein each element symbol represents % by mass of each element in the cast steel, meeting the condition of −3.0≦I≦+14.0, and an exhaust member made thereof.