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:
Jun. 17, 1997
Filed:
Oct. 10, 1995
Applicant:
Inventors:
Jiro Ichikawa, Chita, JP;
Toshihiro Kitagawa, Nagoya, JP;
Assignee:
Daido Tokushuko Kabushhiki Kaisha, Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; C22C / ;
U.S. Cl.
CPC ...
420 87 ; 420108 ;
Abstract
A precipitation hardening steel excellent in machinability, toughness (10J/cm.sup.2 or above), hardness (HRC43 or above) after aging treatment and suitable to a metallic mold for plastics, which consists by weight percentage of C: 0.05-0.18%, Si:0.15-1.00%, Mn:1.0-2.0%, Ni:2.5-3.5%, Cr:0.7-2.0%, Al:0.5-1.5%, Cu:0.7-1.7%, Mo:0.1-0.4%, S:0.05-0.35%, and the balannce of Fe, and H-value obtained through the following equation indicates zero or a positive value: