History and Applications of Stainless Steel
The birth of a unique material
Today, stainless steel is one of the most popular materials in metallurgy. Almost no industry or sphere of human activity can do without structures, parts and mechanisms made of this unique alloy. Its corrosion resistance, strength and aesthetic appearance have made it indispensable in the modern world.
Harry Brearley - the discoverer of stainless steel
The official history of stainless steel dates back just over a hundred years, to 1913. That was when self-taught English metallurgist Harry Brearley accidentally obtained a sample of nickel-chromium alloy while searching for the optimal alloy composition for gun barrels. This metal was rejected along with many others, but a few months later Brearley came across it again and discovered that the sample remained in perfect condition - without rust or traces of oxidation.
The new alloy contained 85.3% iron, 12.8% chromium, 0.44% manganese, 0.24% carbon and 0.2% silicon. It was this composition that became the first officially recorded sample of stainless steel.
Brearley's discovery formed the basis for the industrial production of the new material. As early as 1915, one of the British companies began producing stainless steel cutlery that did not rust, did not tarnish, and retained its shine for many years. This product was patented, and Harry Brearley forever went down in history as the "father of stainless steel."
A long road to success
However, the history of stainless steel goes back further. As early as 1821, French engineer and geologist Pierre Berthier discovered the corrosion resistance of an iron-chromium alloy. He tried to use this material to make cutlery, but it turned out to be too fragile, and his experiment was unsuccessful.
At the beginning of the 20th century, several scientists independently conducted research in this area. American engineer and automobile pioneer Elwood Haynes filed a patent application for tools made from a high-chromium alloy in 1912. However, he was able to patent his invention only in 1919, after Brearley’s discovery.
After 1913, stainless steel research continued, and scientists discovered the main secret of its durability. Chromium, which is part of the alloy, when interacting with oxygen in the air, forms a thin but extremely durable oxide film (Cr₂O₃) on the surface of the metal. This protective layer prevents oxidation of the metal, and also has the ability to self-repair in the event of mechanical damage. Due to this property, stainless steel has become indispensable in a variety of areas.
Stainless steel in the modern world
Today, stainless steel is used everywhere. It has become the most important material in:
- Medicine — production of surgical instruments, implants, dental equipment;
- Chemical industry — production of tanks, pipelines and reactors resistant to aggressive environments;
- Electric power industry — components for thermal, nuclear and hydroelectric power plants;
- Construction and architecture — facade cladding, manufacturing of frames, railings and decorative elements;
- Aerospace industry — engine parts, spacecraft bodies;
- Art and design — decorative elements, interior items, monuments and sculptures.
Modern metallurgy offers dozens of varieties of stainless steel with different characteristics, which makes this material a universal solution for many tasks. Due to its unique properties, stainless steel remains indispensable in the 21st century, and humanity is unlikely to find a worthy alternative to it.
