Data sheets for non-heat treaters
The Contract Heat Treatment Association UK website gives excellent non-technical descriptions of various heat treatment processes including risks and outcomes.
Spectrometer Services provide a useful and cost effective analytical service to determine the exact chemical composition of steel.
Go to their “products” link. You can download data sheets with full chemical analysis and mechanical properties from the “Alloy Steel/High Tensile” and “Mild Steel” links.
Gear Design & Service
Also known as Sanderson Bros. Marshall & Clayton Sanderson manufacture a wide range of gears.