Title:
SEAMLESS STEEL TUBE OF HIGH-CARBON STEEL REDUCING GENERATION OF INTERNAL FLAW
Document Type and Number:
Japanese Patent JP3405265
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To secure workability and to prevent the generation of internal flaws at the time of executing Mannesmann piercing of high carbon steel.
SOLUTION: A billet which is made by continuously casting the high-carbon steel containing, by weight, 0.60 to 1.20% C and ≤0.015% P and has P content in the center segragated part satisfies the equation; [P(%)]≤{-0.0545×[C(%)]+0.0754} is manufactured as the base stock for piercing. In this way, the seamless steel tube of the high-carbon steel reducing the generation of the internal flaws is obtained.
Inventors:
Takashi Nakajima
Application Number:
JP10716799A
Publication Date:
May 12, 2003
Filing Date:
April 14, 1999
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
B22D11/00; B21B19/04; (IPC1-7): B21B19/04; B22D11/00
Domestic Patent References:
| JP10180310A | ||||
| JP9291340A | ||||
| JP10146651A | ||||
| JP8127845A | ||||
| JP999349A | ||||
| JP1158031A | ||||
| JP11226634A |
Attorney, Agent or Firm:
Morio Mori (1 outside)