| 摘要 |
PURPOSE:To provide a titled wire which yields a weld metal having excellent strength and low-temp. characteristic under strict conditions by regulating the contents of C, Mn, Ni, Mo and Si which are essential components, determining the contents of Ni, C, Si and Mo in a manner as to satisfy the specific equations and consisting of the balance iron. CONSTITUTION:The wire for submerged arc welding contains, by wt%, 0.03-0.20% C, 1.60-3.00% Mn, 2.10-3.50% Ni, 0.30-1.50% Mo and <=0.25% Si as essential components, is limited to <=0.25% Cu, <=0.015% P and <=0.015% S, satisfies the conditions expressed by the equations and consists of the balance iron. The wire yields the weld metal having the outstanding strength, low-temp. toughness, crack resistance, etc. as the constituting elements and contents thereof are strictly controlled to the above-mentioned numerical values. |
