STEEL FOR HIGH TOUGHNESS PRESSURE VESSEL HAVING EXCELLENT WELDABILITY

Title:

STEEL FOR HIGH TOUGHNESS PRESSURE VESSEL HAVING EXCELLENT WELDABILITY

Document Type and Number:

Japanese Patent JPS59153867

Kind Code:

A

Abstract:

PURPOSE: To provide a steel for a high toughness pressure vessel whch has excellent weldability and workability and has substantial strength and high toughness even when subjected to working or a post weld heat treatment by readucing an amt. of C and adding Cr and Nb/V in combination to a basic component system of an Mn-(Ni)-Mo steel.

CONSTITUTION: A steel for a high toughness pressure vessel contg., by weight, 0.07W0.20% C, 0.10W0.50% Si, 0.90W1.60% Mn, 0.05W0.40% Cr, 0.40W0.65% Mo, ≤0.025% P, ≤0.006% S, and 0.005W0.050% SolAl, and contg. 0.005W0.07% V or/and 0.003W0.05% Nb. The steel has a positively improved weldability and toughness after post-weld heat treatment (PWHT) while having high strength and has an excellent high temp. characteristic and toughness.

Inventors:

YAMADA MAKOTO
SUZUKI HARUO
TAGAWA HISATOSHI
TSUYAMA AOSHI
ICHINOSE HIROYUKI
TANI SABUROU

Application Number:

JP2490483A

Publication Date:

September 01, 1984

Filing Date:

February 18, 1983

Export Citation:

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Assignee:

NIPPON KOKAN KK

International Classes:

C22C38/00; C22C38/26; C22C38/54; F16J12/00; (IPC1-7): C22C38/26; C22C38/54; F16J12/00

Domestic Patent References:

JPS4940527A	1974-04-16
JPS57161053A	1982-10-04

Attorney, Agent or Firm:

Ichiichi Shirakawa

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