Non-magnetic high manganese cast product

Details Non-magnetic high manganese cast product Non-magnetic high manganese cast product

1995-07-13

1997-07-01

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

420 73, C22C 3858

Patent

active

056435304

ABSTRACT:
The invention intends to develop a functional material provided with sufficient non-magnetism, strength and ductility. The material is a non-magnetic high manganese cast product composed of 0.2 to 0.03% C, not more than 1.0%. Si, 10 to 20% Mn, not more than 0.1% P, not more than 0.05% S, 15.0 to 20.0% Cr, 2.5 to 6.0% Ni and not more than 0.20% N, and is used in a state of as cast. In this non-magnetic high manganese cast product, a magnetic permeability in the state as cast is not more than 1.05, and the non-magnetic high manganese steel has mechanical properties such that a tensile strength is not less than 620N/mm.sup.2, a proof strength is not less than 250N/mm.sup.2, an elongation is not less than 40%, and a reduction of area is not less than 30%. The material is preferably applied to a complicated or large-sized product. In forming the product, because no plastic deformation is employed, there is no possibility of deterioration of magnetic permeability, and because no heat treatment is employed, no decarburized layer is formed, resulting in good machinability and easy finishing.

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