Iron-nickel alloy with a high level of ductility and a low expansion coefficient

摘要

The invention relates to a solid-solution strengthened iron-nickel alloy with a high level of ductility and an expansion coefficient <5×10−6/K in the temperature range between room temperature and −200° C. Said alloy consists of (in wt. %): between 0.005 and 0.05% of C; <0.02% of S; between 1 and 2% of Cr; between 35 and 38% of Ni; between 0.3 and 1.5% of Mn; <0.5% of Si; between 1.0 and 3.5% of ΣMo+W; between 0.2 and 1.0% of Ti; between 0.2 and 1.0% of Nb; <0.02% of P; and between 1.0 and 4.0% of Co; Fe constituting the remainder, in addition to production-related impurities.

主权项

1. A welding additive material comprising a solid solution-strengthened iron-nickel alloy that has a high level of ductility and an expansion coefficient <4.5×10−6/K in the temperature range between room temperature and −200° C., the alloy comprising, in weight %:
C 0.02-0.03% S <0.01% Cr 1.2-1.8% Ni 35-37% Mn 0.8-1.3% Si max. 0.3% ΣMo+W 1.5-2.5% Ti 0.4-0.7% Nb 0.4-0.7% P <0.01% Co 1.2-1.8% Fe Remainder and production-related impurities.