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04. Martensitic Stainless Steels

Martensite, the hardest structural component in steels, is responsible for the high hardness in many sharp edge tools. The formation of martensite is a remarkable phenomenon in materials science and smiths have known for at least 3000 years how to make use of it to produce implements such as

03. Nickel-rich austenitic stainless steels

An Achilles heel of austenitic stainless steels is the susceptibility to stress corrosion cracking (SCC). However, when the nickel concentration exceeds about 20% considerable improvement in the resistance to stress corrosion is observed (Fig 1). Nickel-rich austenitic stainless steels (NiASS),

Season 2

S02E01. Austenitic stainless steels - from kitchen sinks to fuel cell cars Read the article S02E02. Ferritic stainless steels-almost immune to stress corrosion Read the article S02E03. Duplex stainless steels- an interplay between ferrite and austenite Read the article S02E04. Martensitic

02. Ferritic stainless steels-almost immune to stress corrosion

The second in a series of eight columns throughout 2017 on the topic of the seven families of stainless steels; their characteristics, complementary properties and the wide variety of applications from the smallest of items destined for the human body to large scale constructions in the process

04. Medical applications of stainless alloys

Owing to the unique combination of properties of stainless alloys they are indispensable in modern medicine. The required materials properties include good corrosions resistance in body fluids, biocompatibility, good strength to-weight ratio, fatigue resistance and a low magnetic

02. Precipitation hardened stainless steels

An Achilles heel of austenitic stainless steels is the susceptibility to stress corrosion cracking (SCC). However, when the nickel concentration exceeds about 20% considerable improvement in the resistance to stress corrosion is observed (Fig 1). Nickel-rich austenitic stainless steels (NiASS),

03. The role of chromium in duplex stainless steels

Designing a steel that is stainless was considered impossible in the beginning of the 1900’s. A renowned German chemist, G Mars, maintained the opinion that creating a stainless steel is impossible because iron is not a noble metal and its oxides are thermodynamically more stable than the pure

02. The role of nitrogen in duplex stainless steels

Some nitrogen has been present in steel as long as steel-making has taken place. This has been unintentional and, in practice, there have been no means of removing or controlling the nitrogen concentration. It was not until the advent of modern process metallurgical techniques such as AOD, VOD

01. The role of nickel and manganese in duplex steels

In this series of articles, the role of the elements nickel, manganese, chromium, molybdenum and nitrogen in the design of duplex stainless steels will be described. An optimum balance between austenite and ferrite is accomplished by a clever use of the alloying elements.

Season 1

E1. Rock steady! - Nickel and manganese in duplex steels Read the article E2. Steady On! - Nitrogen in duplex steels Read the article E3. Chrome It Up! - Chromium in duplex steels Read the article E4. Bye-Bye Corrosion! - Molybdenum and tungsten in duplex steels Read the article Soundcloud