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Constructual Building Material
Part 1 of Paper
....ts. Steel was first made by cementation, a process of heating bars of iron with charcoal so that the surface of the iron acquired a high carbon content.
The bars were then fused together, yielding a metal harder and stronger than the individual bars but lacking uniformity in these properties. The crucible method, consi.... Part 2 of Paper
....d in kitchen utensils, plumbing fixtures, piping for industrial plants, architectural decoration, and other applications where durability is
The exact date at which people discovered the technique of smelting iron ore to produce usable metal is not known. The earliest iron tools found by archaeologists in Egypt date from about 3000 BC, and iron ornaments were used even earlier; the comparatively advanced technique of hardening iron weapons by heat treatment was known to the Greeks about 1000 BC..... |
| Number of words: 885 - Approximate pages: 4 |
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