Harry Brearley

Harry Brearley (February 18, 1871 – August 12,1948) was the inventor of "rustless steel" (later to be called "stainless steel"). He was born in Sheffield, England.


Brearley had humble beginnings as the son of a steel melter. He left school at the age of twelve to enter his first employment as a labourer in one of the city's steelworks, being transferred soon afterwards to the post of general assistant in the company's chemical laboratory.

For several years, in addition to his laboratory work, he studied at home and later in formal evening classes, to specialize in steel production techniques and associated chemical analysis methods.

By his early thirties, Brearley had earned a reputation as an experienced professional and for being very astute in the resolution of practical, industrial, metallurgical problems. It was in 1908, when two of Sheffield's principal steelmaking companies innovatively agreed to jointly finance a common research laboratory (Brown Firth Laboratories) that Harry Brearley was asked to lead the project.

Brearley died in 1948, at Torquay, a coastal resort town in Devon, south west England. He is buried at Sheffield Cathedral. [ [http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GScid=2129496&GRid=15588224& Findagrave.com] ]

Development of stainless steel

In the troubled years immediately before World War I, arms manufacturing increased significantly in the UK, but practical problems were encountered due to erosion (excessive wear) of the internal surfaces of gun barrels. Brearley began to research new steels which could better resist the erosion caused by high temperatures (rather than corrosion, as is often mentioned in this regard). He began to examine the addition of chromium to steel, which was known to raise the material’s melting point, as compared to the standard carbon steels.

The research concentrated on quantifying the effects of varying the levels of carbon (C, at concentrations around 0.2 weight %) and chromium (Cr, in the range of 6 to 15 weight %).

In order to undertake metallography to study the microstructure of the experimental alloys (the main factor responsible for a steel's mechanical properties) it was necessary to polish and etch the metallic samples produced. For a carbon steel, a dilute solution of nitric acid in alcohol is sufficient to produce the required etching, but Brearley found that the new chromium steels were very resistant to chemical attack.

It was probably Harry Brearley’s upbringing in Sheffield, a city famous for the manufacture of cutlery since the 16th century, which led him to appreciate the potential of these new steels for applications not only in high temperature service, as originally envisioned, but also in the mass production of food-related applications such as cutlery, saucepans and processing equipment etc. With this in mind he extended his examinations to include tests with food acids such as vinegar and lemon juice, with very promising results. (Up to that time carbon steel knives were prone to unhygienic rusting if they were not frequently polished and only expensive sterling silver or EPNS cutlery was generally available to avoid such problems). Brearley initially called the new alloy "rustless steel"; the more euphonic "stainless steel" was suggested by Ernest Stuart of R.F. Mosley's, a local cutlery manufacturer, and eventually prevailed. It is reported [ [http://www.stainlesssteel.or.kr/english/stsinfo/develop.asp] dead link|date=August 2008] that the first true stainless steel, a 0.24wt% C, 12.8wt% Cr ferrous alloy, was produced by Brearley in an electric furnace on August 13, 1913. He was subsequently awarded the Iron and Steel Institute's Bessemer Gold Medal in 1920.

Virtually all research projects into the further development of stainless steels were interrupted by the 1914-18 War, but efforts were renewed in the 1920s. Though Harry Brearley had left the Brown Firth Laboratories in 1915, following disagreements regarding patent rights, the research did continue there under the direction of his successor, Dr. W. H. Hatfield.

It is Hatfield who is credited with the development, in 1924, of a stainless steel which even today is probably the widest-used alloy of this type, the so-called "18/8", which in addition to chromium, includes nickel (Ni) in its composition (18wt% Cr, 8wt% Ni).

ee also

*List of people from Sheffield


External links

* [http://www.stainlesssteel.or.kr/english/stsinfo/develop.asp The development of stainless steel]
* [http://www.tilthammer.com/bio/brear.html Biography]

NAME=Brearley, Harry
SHORT DESCRIPTION=Inventor of stainless steel
DATE OF BIRTH=February 18, 1871
PLACE OF BIRTH=Sheffield, England
DATE OF DEATH=August 12,1948
PLACE OF DEATH=Torquay, Devon, England

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Harry Brearley — Harry Brearley. (Plaque aux anciens Brown Firth Laboratories, Sheffield) Harry Brearley (18 février 1871 à Sheffield – 12 août 1948 à Torquay) était un métallurgiste anglais. On lui doit l invention en 1913 du rustless steel (« acier sans… …   Wikipédia en Français

  • Harry Brearley — (* 18. Februar 1871 in Sheffield, England; † 12. August 1948 in Torquay) gilt im angelsächsischen Bereich als der Erfinder des rostfreien Stahls, während in Deutschland die Firma Krupp schon ein Jahr vor Brearleys Durchbruch ein Patent auf… …   Deutsch Wikipedia

  • Harry Brearley — Monumento en honor a Harry Brearley en la antigua Brown Firth Research Laboratories Harry Brearley (*18 de febrero de 1871 – † 12 de agosto de 1948) es un metalurgico inglés conocido como el inventor del rustless steel (denominado más tarde como… …   Wikipedia Español

  • Harry Brearley — stainless steel …   Inventors, Inventions

  • Brearley — is a surname that may refer to:* Harry Brearley, British chemist who invented stainless steel * Mike Brearley, Middlesex and England cricketer, one of the most successful cricket captains of all time * Walter Brearley, Lancashire fast bowler *… …   Wikipedia

  • Brearley — ist der Familienname folgender Personen: David Brearley (1745–1790), Deligierter der Constitutional Convention Harry Brearley (1871–1948), britischer Erfinder Norman Brearley (1890–1989), australischer Pilot und Luftfahrtpionier Peter Brearley (* …   Deutsch Wikipedia

  • Harry — es un nombre masculino, forma medieval del nombre Henry. En tiempos modernos se usa como diminutivo de Henry o Harold[1] y puede referirse a: Deborah Harry, cantante y actriz estadounidense. Grupo Blondie. Harry Abend, escultor polaco. Harry… …   Wikipedia Español

  • Brearley —  Cette page d’homonymie répertorie différentes personnes partageant un même nom. Le nom de famille Brearley est porté notamment par : David Brearley (1745 1790), délégué à la convention constitutionnelle américaine ; Harry Brearley …   Wikipédia en Français

  • Brearley School — Infobox Secondary school name = The Brearley School native name = motto = By Truth and Toil established = 1884 city = New York City state = NY province = country = USA campus = type = Private Girls School affiliation = affiliations = president =… …   Wikipedia

  • Harry Dean — Infobox Historic Cricketer nationality = English country = England country abbrev = Eng name = Harry Dean picture = Cricket no pic.png batting style = Left handed batsman (LHB) bowling style = Left arm fast medium tests = 3 test runs = 10 test… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.