Non-magnetizable steel casting alloy, its use and process of manufacture

Abstract

PCT No. PCT/CH78/00040 Sec. 371 Date July 30, 1979 Sec. 102(e) Date July 23, 1979 PCT Filed Nov. 24, 1978 PCT Pub. No. WO79/00328 PCT Pub. Date June 14, 1979 A non-magnetizable steel casting alloy with the composition ______________________________________ C max. 0.30% Si max. 2.00% Mn 4.00-20.00% Cr 10.00-20.00% Ni 4.00-12.00% Mo max. 3.00% N.sub.2 0.02-0.20% ______________________________________ the remainder being iron, and with a magnetic permeability .mu..ltoreq.1.20 and with a CrNiMn equivalence factor: f=6.5-% Cr-0.4 . % Ni+0.1 . % Mn+0.075 . % Cr . % Ni+0.013 . % Cr . % Mn-0.02 . % Ni . % Mn, wherein -6.ltoreq.f.ltoreq.+2, meets in the best manner the total set of the following properties: deep permeability, homogeneous strength and toughness values, structural stability at low temperatures, homogeneous magnetic permeability in large solidification cross sections, good machinability and weldability without micro-cracks, and a sufficient yield point. Furthermore, uses in high field intensities and low temperatures and a process in which a heat treatment takes place after welding are subject matter of the invention.

Dependencies are inferred from the claim text.