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Thursday, June 28, 2007 - 9:30 AM
HSS2.3

A High Strength PH Stainless Steel for Structural Applications, MLX17

A. Tronche, AUBERT & DUVAL, Gennevilliers, France

ABSTRACT – A HIGH STRENGTH PH STAINLESS STEEL, MLX17

AUBERT & DUVAL alloy, MLX17, is a very high strength PH stainless steel recently introduced to the Aerospace industry. The alloy continues a series of high strength, high fracture toughness, and corrosion resistant PH steels from AUBERT& DUVAL. This series of alloys, already widely used in the Aerospace industry, provides solutions ranging from 150 to 250ksi. Thereby, replacement of cadmium or chromium plated low carbon steels may be considered. Additionally, the alloy offers Aerospace manufacturers certain fabrication benefits.

In order to qualify for Aerospace structural applications, MLX17 was extensively tested in products ranging from 0.5 to 12 inch thickness. Tensile tests, fracture toughness, and stress corrosion resistance results were recorded.

The metallurgy of the grade along with the results of the study carried out on more than 10 heats will be discussed. Aerospace applications, including large products for landing gears, will be presented.


Summary: AUBERT & DUVAL alloy, MLX17, is a very high strength PH stainless steel recently introduced to the Aerospace industry. The alloy continues a series of high strength, high fracture toughness, and corrosion resistant PH steels from AUBERT&DUVAL. This series of alloys, already widely used in the Aerospace industry, provides solutions ranging from 150 to 250ksi. Thereby, replacement of cadmium or chromium plated low carbon steels may be considered. Additionally, the alloy offers Aerospace manufacturers certain fabrication benefits. In order to qualify for Aerospace structural applications, MLX17 was extensively tested in products ranging from 0.5 to 12 inch thickness. Tensile tests, fracture toughness, and stress corrosion resistance results were recorded. The metallurgy of the grade along with the results of the study carried out on more than 10 heats will be discussed. Aerospace applications, including large products for landing gears, will be presented.