renewed in the 1920s. Brearley had left the Brown Firth Laboratories in 1915, following disagreements regarding patent rights, but the research continued 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). Memorials A mural of Brearley, marking the 100th anniversary of his invention of stainless steel, was commissioned for the side of a building on Howard Street, Sheffield, and was painted by the artist Sarah Yates (aka "Faunagraphic"). Books H. Brearley & F. Ibbotson (1902) The Analysis of Steel-works Materials H. Brearley (1911) The Heat Treatment of Tool Steel H. Brearley (1914) The Case-Hardening of Steel H. Brearley (1918) The Heat Treatment of Steel H. Brearley (1933) Steel Makers H. Brearley (1941) Knotted String (autobiography) See also List of people from Sheffield Elwood Haynes Portland Works References External links Biography Archive.org, list of books by creator:"Brearley, Harry, b. 1871" 1871 births 1948 deaths People from Sheffield British metallurgists English inventors History of Sheffield Science and technology in South Yorkshire Stainless steel Engineers from Yorkshire Bessemer Gold Medal