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Iron meteorites consist overwhelmingly of nickel-iron alloys. The metal taken from these meteorites is known as meteoric iron and was one of the earliest sources of usable iron available to humans. Iron was extracted from iron–nickel alloys, which comprise about 6% of all meteorites that fall on the Earth.
There is evidence that iron was known from before 5000 BC. [15] The oldest known iron objects used by humans are some beads of meteoric iron, made in Egypt in about 4000 BC. The discovery of smelting around 3000 BC led to the start of the Iron Age around 1200 BC [16] and the prominent use of iron for tools and weapons. [17]
The best known sulfide is iron ... Cast iron was first produced in China during 5th ... Humans experience iron toxicity when the iron exceeds 20 milligrams ...
The characteristic of an Iron Age culture is the mass production of tools and weapons made not just of found iron, but from smelted steel alloys with an added carbon content. [ citation needed ] Only with the capability of the production of carbon steel does ferrous metallurgy result in tools or weapons that are harder and lighter than bronze .
Iron working came into prominence from about 1,200 BCE. In the 10th century BCE, glass production began in ancient Near East. In the 3rd century BCE, people in ancient India developed wootz steel, the first crucible steel. In the 1st century BCE, glassblowing techniques flourished in Phoenicia.
From man's discovery of fire to the deployment of the world's most powerful weapon, here's a look at 14 events that changed military history.
Steel is an alloy composed of between 0.2 and 2.0 percent carbon, with the balance being iron. From prehistory through the creation of the blast furnace, iron was produced from iron ore as wrought iron, 99.82–100 percent Fe, and the process of making steel involved adding carbon to iron, usually in a serendipitous manner, in the forge, or via the cementation process.
Most cast iron was refined and converted to bar iron, with substantial losses. Bar iron was made by the bloomery process, which was the predominant iron smelting process until the late 18th century. In the UK in 1720, there were 20,500 tons of cast iron produced with charcoal and 400 tons with coke.