For example: 1, corner coins are manufactured by copper -zinc alloy, and its diameter is 20mm. 2, 5 corner coins are made of copper -zinc alloy, and its diameter is 26mm. 3, 1 yuan coins are made of copper nickel alloy, and its diameter is 30mm. Copper zinc alloy is a memory alloy. Golden yellow, like gold, commonly known as brass. Pure copper and nickel can significantly improve strength, corrosion resistance, hardness, resistance and thermal power, and reduce the temperature coefficient of resistivity. Therefore, the mechanical performance and physical properties of white copper are extremely good in the mechanical and physical properties of other copper alloys. They have good ductility, high hardness, beautiful color, and deep resistance. The authenticity of the one -dollar coin: First look at the pattern of the coin. In the early years, the fake currency patterns made of pouring method were rough and blurred. The national emblem, Tiananmen, peony core, chrysanthemum core, etc. all blurred, and the signs of polishing was obvious. In recent years, the counterfeit methods of criminals have been continuously updated. The use of real currency as a template, flipping the implants on the electric spark machine, and making fake coins. The patterns of this type of counterfeit coins are relatively rough, font strokes are slightly thick, strokes are irregular, and the subtle places are defective. The pattern edges are virtual and blurred, and they are obviously lacking three -dimensional and hierarchy. In order to make up for the shortcomings of imitation, some fake coins use manual modification, reinstallation of flower cores, petals and other methods. As a result, the fake marks are more obvious. If discrimination of the true and false of one yuan coins. Secondly, the color of the one is nickel -white. The fake coins are different depending on the material and the color difference is obvious. The color of stainless steel fake coins is bright, and the color of fake coins made of iron alloy, aluminum alloy, lead alloy and other materials is gray; nickel -plated alloys in the later stage generally have poor coordination force in the coating. The appearance is very easy to recognize.
For example:
1, corner coins are manufactured by copper -zinc alloy, and its diameter is 20mm.
2, 5 corner coins are made of copper -zinc alloy, and its diameter is 26mm.
3, 1 yuan coins are made of copper nickel alloy, and its diameter is 30mm. Copper zinc alloy is a memory alloy. Golden yellow, like gold, commonly known as brass. Pure copper and nickel can significantly improve strength, corrosion resistance, hardness, resistance and thermal power, and reduce the temperature coefficient of resistivity. Therefore, the mechanical performance and physical properties of white copper are extremely good in the mechanical and physical properties of other copper alloys. They have good ductility, high hardness, beautiful color, and deep resistance.
The authenticity of the one -dollar coin:
First look at the pattern of the coin. In the early years, the fake currency patterns made of pouring method were rough and blurred. The national emblem, Tiananmen, peony core, chrysanthemum core, etc. all blurred, and the signs of polishing was obvious. In recent years, the counterfeit methods of criminals have been continuously updated. The use of real currency as a template, flipping the implants on the electric spark machine, and making fake coins.
The patterns of this type of counterfeit coins are relatively rough, font strokes are slightly thick, strokes are irregular, and the subtle places are defective. The pattern edges are virtual and blurred, and they are obviously lacking three -dimensional and hierarchy. In order to make up for the shortcomings of imitation, some fake coins use manual modification, reinstallation of flower cores, petals and other methods. As a result, the fake marks are more obvious.
If discrimination of the true and false of one yuan coins. Secondly, the color of the one is nickel -white. The fake coins are different depending on the material and the color difference is obvious. The color of stainless steel fake coins is bright, and the color of fake coins made of iron alloy, aluminum alloy, lead alloy and other materials is gray; nickel -plated alloys in the later stage generally have poor coordination force in the coating. The appearance is very easy to recognize.