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6061-T6 aluminium standard heat treating process. T6 temper 6061 has been treated to provide the maximum precipitation hardening (and therefore maximum yield strength) for a 6061 aluminium alloy. It has an ultimate tensile strength of at least 290 MPa (42 ksi) and yield strength of at least 240 MPa (35 ksi).
24-carat gold is pure (while 100% purity is very difficult to attain, 24-carat as a designation is permitted in commerce for a minimum of 99.95% purity), 18-carat gold is 18 parts gold, 6 parts another metal (forming an alloy with 75% gold), 12-carat gold is 12 parts gold (12 parts another metal), and so forth.
The world of men's jewelry is a vast, glimmering space. There are accessories of all shapes and styles and sizes, really; silver and gold and white gold and rose gold and brass.
If the gold layer is 12 kt or higher, the minimum layer of karat gold in an item stamped gold-filled marks must equal at least 1 ⁄ 20th the total weight of the item. The most common stamps found on gold-filled jewelry are 1 ⁄ 20th 12kt GF and 1 ⁄ 20th 14kt GF. Also common is 1 ⁄ 10th 10kt. These standards are for modern gold-filled items.
Gold content in AuAl 2 is around 79% and can therefore be referred to as 18 karat gold. Purple gold is more brittle than other gold alloys (called the "purple plague" when it forms and causes serious faults in electronics [14]), as it is an intermetallic compound instead of a malleable alloy, and a sharp blow may cause it to shatter. [15]
Grills are made of several types of metal (often silver, gold or platinum) that are sometimes inlaid with precious stones; they are generally removable, though some may be permanently attached to the teeth. [5] Gold grills can be made from 10-karat, up to 24-karat gold. The gold can be tinted yellow, white and rose color. [6] [dubious – discuss]