Keywords: heavy duty connector, circular connector
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Hardware, refers to the use of gold, silver, copper, iron, tin and other metals through processing, casting tools, used to fix things, processing things, decoration and so on.
As we all know, gold is a very valuable precious metal, worth 385 yuan per gram, most of which are well preserved by the national government. Many species are gold. Gold pieces are rightly used to make valuables. Objects cast in gold are usually jewelry, currency, currency and other items, such as rings, necklaces, gold coins (ancient times), gold bricks, gold bars, etc., and some are used to make objects such as celestial globes. The gold content of gold articles is measured in K (carats), as follows (the percentages in the table are approximate, and the bold type is the common gold content):
Silver is silvery white, is also a kind of precious metal. In ancient China, it was used to make silver ingots or broken silver for state expenses and daily transactions. Ancient Egyptians used to make silver into silver tablets to treat wounds by using the bactericidal effect of silver water-soluble silver ions. Modern silver is also commonly used in jewelry processing. Silver has excellent conductivity and heat transfer performance. Common industrial silver parts are generally parts of electronic instruments and power generation equipment, such as silver core wires.
Copper is the messenger of human civilization. The ancients often used copper to make ritual wares, such as copper tripods and modern tools. As we all know, copper has excellent electrical conductivity, second only to silver, but copper ore is much cheaper than silver ore. Copper is often used to manufacture wire cores and parts of some communication equipment and electronic equipment.
The range of applications of iron is very wide, and the content is very large in the world: the world has proven iron ore storage capacity has exceeded more than 200 billion tons. There are two types of iron commonly used: hematite and magnetite.
Hematite The composition of hematite is ferric oxide, which is dark red or steel gray. It is mostly cast iron nails, screws, nuts, hammer heads, machine parts, etc.
Magnetite magnetite with magnetic, also known as "magnet", "magnet", the scope of application of magnetite is not as wide as hematite, but also useful, magnetite can be made by shaping magnet identification objects.
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