Mechanical Properties of Martensitic Stainless Steel (AISI420) Subjected to Conventional and Cryogenic Treatments

Authors

• Hareer Mohamed, Materials Engineering Department- University of Technology-Iraq.
• Ali Ataiwi, University of Technology, Materials Engineering DepartmentFollow
• Jamal Dawood, Materials Engineering Department- University of Technology-Iraq.Follow

Keywords

Martensitic Stainless Steel (MSS), Cryogenic Treatment, Hardness, Tensile test

Document Type

Research Paper

Abstract

Martensitic Stainless Steel (AISI420) MSS are vastly used because of their properties conventional which mix good mechanical and corrosion resistance. Cryogenic up to -196°C for different soaking time and heat treatments at (1000,500,200°C) for 15 minutes is one of the ways that used to enhance mechanical properties of these steels by means transformation of retained austenite, deformation regarding martensite then carbide refinement. the result showed an increase in tensile strength of samples that were treated cryogenically and tempered at 500°C was 933 (MPa) compared to samples that just treated conventionally in austenitizing and tempering at the same temperature that was 880 (MPa). The hardness values increased considerably to 414HV and 321 HV for the specimen that tempered at 200°C and 500°C respectively, precipitation of small carbides was observed that this is responsible for the improvement in the mechanical properties of the material.

Recommended Citation

Mohamed, Hareer; Ataiwi, Ali; and Dawood, Jamal (2026) "Mechanical Properties of Martensitic Stainless Steel (AISI420) Subjected to Conventional and Cryogenic Treatments," Engineering and Technology Journal: Vol. 38: Iss. 8, Article 1.
DOI: https://doi.org/10.30684/etj.v38i8A.517

DOI

10.30684/etj.v38i8A.517

First Page

1096

Last Page

1105