STEEL HAVING SUPERIOR TOUGHNESS AT WELDED JOINT

Title:

STEEL HAVING SUPERIOR TOUGHNESS AT WELDED JOINT

Document Type and Number:

Japanese Patent JPS61560

Kind Code:

A

Abstract:

PURPOSE: To obtain a steel having superior toughness at a welded joint at a low cost by adding specified percentages of C, Si, Mn, V, Ti, Nb and sol.Al to Fe.

CONSTITUTION: A steel consisting of, by weight, 0.05W0.20% C, 0.05W0.50% Si, 0.50W2.00% Mn, 0.005W0.025% V, 0.005W0.015% Ti, 0.005W0.025% Nb, 0.010W 0.040% sol.Al and the balance Fe or further contg. one or more among ≤0.70% Ni, ≤0.30% Mo and ≤0.50% Cu is manufactured. The steel has 40W60kgf/mm2 tensile strength and gives a steel sheet having such high toughness as TNOT-30°C or below at a welded joint.

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Inventors:

KIKUTAKE TETSUO
YAMABA RIYOUTA
OKAMOTO KENTAROU
HASHIKAWA KAZUYOSHI

Application Number:

JP11911784A

Publication Date:

January 06, 1986

Filing Date:

June 12, 1984

Export Citation:

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Assignee:

NIPPON STEEL CORP

International Classes:

C22C38/00; C22C38/14; C22C38/16; (IPC1-7): C22C38/14; C22C38/16

Domestic Patent References:

JPS5923854A	1984-02-07
JPS5524935A	1980-02-22
JPS58171526A	1983-10-08

Attorney, Agent or Firm:

Yoshishima Ning

Next Patent: SINTERED ALLOY MATERIAL FOR VALVE SEAT