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I welcome questions related to the physical metallurgy of steels, preferably stainless steels.

Experience in the area

- Heat treatment of 15-5PH precipitation hardenable stainless steel - Thermomechanical Processing of AISI 430 ferritic stainless steel - Quenching and Partitioning (Q&P) processing of AISI 430 (ferritic) and AISI 420 (martensitic) stainless steels - Metastable austenitic FeCrMnNi-base steels


Institute for Iron and Steel Technology (IEST), Technische Universitšt Bergakademie Freiberg, Freiberg, Germany


Solid State Phenomena (3), Steel Research International (1), Materials Science and Technology (1), Metallurgical and Materials Transactions A (2), Scripta Materialia (1)


Bachelor's degree in Materials Engineering earned from Isfahan University of Technology, Isfahan, Iran. Master's degree in Materials Science and Engineering earned from Sharif University of Technology, Tehran, Iran. Doctoral degree from Graduate Institute of Ferrous Technology (GIFT), Pohang University of Science and Technology (POSTECH), Pohang, Republic of Korea. Scientific Assistant, Technische Universitšt Bergakademie Freiberg, Freiberg, Germany

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Recent Answers from Javad Mola

2016-12-31 Stainless steel:

Precipitation-hardenable stainless steels are commonly heat treated so as to exhibit peak hardness and strength for instance by a one-hour heat treatment at 480 degrees Celsius. A shorter time or a lower


I assume you are referring to the tensile properties of bars machined to different diameters. As long as your bars have a uniform microstructure in the radial direction (NO surface decarburization/carburization/intergranualar

2015-05-18 heat treatment:

Annealing in general may be used to describe thermal treatment processes.     In steels, full annealing, sometimes simply referred to as annealing, is a term used to describe the heat treatment resulting

2015-03-25 Stress relief of 17-4 Condition H1150:

As you are assuming, a stress relief operation at a 1050 F subsequent to aging at 1150 F will not make your rings H1050-treated. The reason is that the copper precipitates formed and somewhat coasened

2014-09-11 17-4 PH H900:

There are two things to consider before making a decision. Hardness which affects the machinability is lower in the solution annealed condition, namely after annealing at around 1900 F, than in the H900


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