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:
Nov. 24, 2020
Filed:
Jun. 02, 2016
Applicant:
Hitachi Metals, Ltd., Tokyo, JP;
Inventor:
Ryo Goto, Kuwana, JP;
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 5/14 (2006.01); C22C 37/10 (2006.01); C22C 1/02 (2006.01);
U.S. Cl.
CPC ...
C21D 5/14 (2013.01); C22C 1/02 (2013.01); C22C 37/10 (2013.01);
Abstract
A black heart malleable cast iron including carbon of not lower than 2.0% and not higher than 3.4%; silicon of not lower than 0% and not higher than 1.4%; aluminum of not lower than 2.0% and not higher than 6.0%, which are all expressed by percent by mass; and balance iron and inevitable impurities, wherein a value of a carbon equivalent CE expressed by Equation (1) is not lower than 3.0% and not higher than 4.2%, where C denotes a content of the carbon expressed by percent by mass, Si denotes a content of the silicon expressed by percent by mass and Al denotes a content of the aluminum expressed by percent by mass: CE=C+Si/3+Al/8 (1).