Title:
HEAT-RESISTANT CAST STEEL WITH SUPERIOR CARBURIZATION RESISTANCE AND SUPERIOR CREEP RUPTURE STRENGTH AT HIGH TEMPERATURE
Document Type and Number:
Japanese Patent JPS5953662
Kind Code:
A
Abstract:
PURPOSE: To obtain the titled heat-resistant cast steel most suitable for use as the material of a member for a high-temp. apparatus such as a reformer tube, by specifying the composition of Ni-Cr-Mn-N-W steel.
CONSTITUTION: This heat-resistant cast steel consistis of, by weight, 0.25W 0.75% C, ≤2.0% Si, 5W20% Mn, 20W30% Cr, 15W40% Ni, 0.01W0.40% N, 0.5W 3.0% W and the balance Fe. The steel may further contain 0.5W3.0% Cu and/or 0.01W1.0% Al. The steel can be provided with especially superior carburization resistance without deteriorating the creep rupture strength at high temp. as compared to a conventional HP material contg. W or the like.
Inventors:
SUGITANI JIYUNICHI
TSUCHIDA KOUJI
TSUCHIDA KOUJI
Application Number:
JP16532182A
Publication Date:
March 28, 1984
Filing Date:
September 22, 1982
Export Citation:
Assignee:
KUBOTA LTD
International Classes:
C22C19/05; C22C30/00; C22C33/00; C22C38/00; C22C38/58; (IPC1-7): C22C19/05; C22C30/00; C22C38/58
Domestic Patent References:
| JP44023420A | ||||
| JP43012501A | ||||
| JPS5040099A | 1975-04-12 | |||
| JPS55152158A | 1980-11-27 |
Attorney, Agent or Firm:
Toshio Yasuda