HIGH STRENGTH LOW ALLOY STEEL WITH SUPERIOR PLATING CRACK RESISTANCE AT WELD HEAT-AFFECTED ZONE

Title:

HIGH STRENGTH LOW ALLOY STEEL WITH SUPERIOR PLATING CRACK RESISTANCE AT WELD HEAT-AFFECTED ZONE

Document Type and Number:

Japanese Patent JPS5884959

Kind Code:

A

Abstract:

PURPOSE: To enhance the plating crack resistance of a high strength low alloy steel at the weld heat-affected zone by restricting the amounts of C, Mn, Si, Nb, Ti, V and Al contained in the steel to specified ranges.

CONSTITUTION: The components of a low alloy steel having ≥55kg/mm2 strength are restricted to 0.04W0.11% C, 0.90W1.70% Mn, 0.05W0.30% Si, 0.01W0.08% Nb, 0.02W0.09% V, 0.005W0.030% Ti and 0.005W0.050% Al while satisfying quantitative relation represented by 93-8.8×103C(C-0.1)-63Si-38M+430V≥42. The occurrence of intercrystalline cracks in the resulting steel at the weld heat- affected zone is prevented when the steel is subjected to galvanizing or other plating.

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Inventors:

YAMATO KAZUNARI
TAKEDA TETSUJIROU
AIHARA SHIYUUJI

Application Number:

JP18095781A

Publication Date:

May 21, 1983

Filing Date:

November 13, 1981

Export Citation:

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Assignee:

NIPPON STEEL CORP

International Classes:

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

Attorney, Agent or Firm:

Tachio Chanogi

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