Heavy metals only mercury, lead and bismuth meet all of them. Despite this lack of agreement, the term (plural or singular) is widely used in science. A density of more than 5 g/cm is sometimes quoted as a commonly used criterion and is used in the body of this article. The earliest known metals—common metals such as iron, copper, and tin, and precious metals such as silver, gold, and platinum—are heavy metals. From 1809 onwards, light metals, such as magnesium, aluminium, and titanium, were discovered, as well as less well-known heavy metals including gallium, thallium, and hafnium. Some heavy metals are either
Russel Metals three business segments: metals service centres, energy products, and steel distributors. As of 2017, 49% of revenue was from the service centres, 39% was from energy products, and the rest was from steel distribution. It has sites in both Canada and the United States, with most sites located in Canada, and derives roughly 30 per cent of its revenues from the United States. Russel Metals Russel Metals Inc. is a Canadian public metals distribution and processing company. It is one of North America's largest metal distribution companies, with operations across Canada and the United States. The company was originally established