Blykalla Reaktorer Stockholm Ab

Blykalla Ab

Peter Szakálos

Peter Domstedt

A steek suitable for structural components used in contact with liquid lead or liquid lead alloys in nuclear reactors consisting of in weight % (wt. %): C 0.02-0.09; Si 0.1-1.6; Mn 1.5-3.0; Cr 9.0-12.0; Ni 10.0-16.8; Al 2.0-3.4; Ti 0.1-1.0; Nb≤0.5; V≤0.5; Ta≤1.5; Y≤0.5; Mo≤1.5; W≤1.5; Cu≤1.7; N≤0.06; Co≤1.0; B≤0.1; Zr≤0.5; Hf≤0.5; RE≤0.2; Ca≤0.1; Mg≤0.1; Bi≤0.1; SE≤0.1 and balance Fe apart from impurities, wherein the content of RE does not include the amount of Y but only the amount of the elements having an atomic numbers 21 and 57-71, wherein the steel fulfils one or more of the following requirements:

Overlay welding material

The invention relates to a steel for structural components used at elevated temperatures. The steel comprises the following main components (in wt. %): Cr 8.0-14.0 Ni 4.0-14.0 Al 2.5-5.0 C 0.003-0.3 N&#x2264;0.06 Mo+W&#x2264;4.0 at least one of: Nb 0.01-1.0 Ta 0.01-1.0 Ti 0.01-1.0 Zr 0.01-1.0 Hf 0.01-1.0 Y 0.05-1.0 balance optional elements, Fe and impurities; and the steel composition fulfilling the following condition: Cr(eq)+Ni(eq)&#x2264;30; where Cr(eq)=Cr+2Al+1.5(Si+Nb+Ti)+Mo+0.5W; and Ni(eq)=Ni+10(C+N)+0.5(Mn+Cu+Co).

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Stockholm, Sweden

Peter Szakálos