Maraging steel is developed by INCO, Inc (USA). It is an age-hardenable ultra-high strength steel made by adding Cobalt, Molybdenum, Titanium, Aluminum, etc. as age-hardening elements to low-carbon 18% Nickel steel.
Because of its high strength, high toughness, and high notch strength, this material is used in aircraft, rockets, missiles, and space development equipment such as satellites.
TOKKIN's MAS-1 raw material is provided by Daido Steel.
Because it achieves over 1960 MPa tensile strength by age-hardening treatment and also has toughness, MAS-1 is also used for watch parts, computer parts, precision springs, diaphragmss, and other parts requiring an extremely high reliability
This is a very expensive material among iron-based alloys because it contains approximately 30% of expensive elements such as Nickel, Cobalt, and Molybdenum.
Main features of MAS-1:
(1) Tensile strength over 1,960 N/mm2
MAS-1 can achieve over 1,960 N/mm
2 tensile strength through comparatively simple age-hardening treatment.
After cold working, tensile strength increases further; for example, tensile strength after age hardening of 50% cold-rolled material reaches over 2,110 N/mm
2.
(2) High Strength and Toughness
In addition to high strength, MAS-1 has excellent toughness, and also has high notch and fatigue strength.
(3) Easy processing?Rapid cooling is not required after heat treatment
MAS-1 does not require rapid cooling after age hardening, making it easy to handle and virtually free from distortion due to heat treatment.
(4) Slight Hardening by Cold Working
MAS-1 has a martensitic structure even in the solid solution state, so there is only slight hardening by cold working.
(Increase amount around HV40 with 50% rolling.)
(5) Relatively Good Weldability and Machinability