LOW THERMAL-EXPANSION ALLOY THIN-SHEET SUPERIOR IN MANUFACTURING PROPERTY

摘要

PROBLEM TO BE SOLVED: To provide a low thermal-expansion alloy thin-sheet, which does not cause slab surface-cracking in blooming-rolling, coil edge-cracking in hot- rolling, and rupturing, and hence is manufactured in a high yield.;SOLUTION: The low thermal-expansion alloy thin-sheet superior in manufacturing in a high yield comprises, by mass%, 34-38% Ni, 0.015% or less C, 0.05% or less Si, 0.01-0.5% Mn, 0.005% or less S, 0.07% or less Al, 0.01% or less N, 0.05% or less Cu, and 0.002% or less Ca; one or more of Nb, V, Ta, W, Mo, Zr, Y, Ti, Hf, Cr, Sb, and B; 0.002-2% of a Gf value expressed in the expression: Gf=(Nb/93+V/51+Ta/181+W/184+Mo/96+Zr/91+Y/89+Ti/48+Hf/178+Cr/52+ Sb/122+B/11)×-51; and the balance substantially Fe.;COPYRIGHT: (C)2003,JPO