The steel core here refers to a piece of stainless steel.
The advantage of nickel plating on steel core is that the material composition changes after melting. This is a kind of uneven material inside and outside, which can't be melted again and is easy to be altered. Other stainless steel properties are floating clouds, and stainless steel will do.
Extracted information:
Refined ordinary commemorative coins (hereinafter referred to as refined coins) are mainly made of several materials, such as copper-zinc alloy, copper-nickel alloy, purple copper alloy, brass alloy, two-color inlaid copper alloy and nickel plating on steel core. These coins refined from different materials have their own merits, showing the brilliance and brilliance of coin casting art in China. Here, I would like to summarize the characteristics of nickel-plated coins with steel core and communicate with you. I hope you can be outspoken.
1. "Nickel plating on steel core" is imported from abroad. It is made into blank cakes by high-temperature barrel plating nickel, and then stamped into coins.
2. The earliest nickel-plated coin with steel core was the 1 1 Asian Games. The issue number of this coin is 1990.8.22, which is a sports theme, cast by Shanghai Mint. It has two kinds of packaging, exquisite workmanship and little market circulation. The current price is around 800 yuan.
Third, the most beautiful steel-core nickel-plated coin is Dunhuang. This coin was issued on June 30, 2000, with the theme of cultural heritage and religion, and it is also a century coin. It was cast by Shanghai Mint with a circulation of 20,000. The characters on the front of the coin are serene and lifelike. Looking at the edge of the coin from the front, there are two formats of RMB, which is also the first commemorative coin divided into two formats. The current price is about 150 yuan.
4. The rarest nickel-plated coin with steel core is the first World Women's Football Championship. The issue number of this coin is1991.1.1,which was minted by Shanghai Mint. Circulation is unknown. At present, only one set has been found, and the conservative price is above 10000 yuan.
The most valuable nickel-plated coin with steel core is the sample coin made in the first World Women's Football Championship. Except for Inner Mongolia and the 40th anniversary of the founding of the People's Republic of China, the Big Three Treasures and the Small Four Treasures are all made of copper-nickel alloy and nickel-plated steel core. They are the 70th anniversary of the founding of the Producers' Party of China, the 50th anniversary of the founding of the United Nations, the 50th anniversary of the victory of War of Resistance against Japanese Aggression in China and the world anti-fascist war, and the 4th World Conference on Women.
6. The most potential nickel-plated coin with steel core is Zhu De. This coin is1996.11.27, minted by Shanghai Mint, with a circulation of 20,000 pieces. It is the first series of characters with good craftsmanship, the first set of kangzhuang binding, and the best set of coins on the market recently. My article has been analyzed in detail, so I won't repeat it here.
Seven, the nickel-plated steel-core coins that most completely reflect the coinage process are character series. Since Soong Ching Ling, this series has been distributed in Mao Zedong, Zhu De, Zhou Enlai, Liu Shaoqi, Deng Xiaoping and Chen Yun. The technological quality of this set of coins can be divided into three stages. Song and Mao are the first stage, and their skills are the worst. In the second stage, Zhu, Zhou, and the characters have a strong three-dimensional sense; Deng and Chen are the third stage, and the sandblasting process goes further. Since Deng, there has been the abbreviation "J" representing exquisiteness, and the difference between the positive and negative versions has begun. Regarding the series of people, Liu Shaoqi was the first coin with a certificate, which was different from all the certificates after Kang Yinge. The name of this coin was inscribed by calligrapher Liu Bingsen; The statue of Deng Xiaoping is the largest sculpture; There is an error in the issue number on the Chen Yun card, and there is no collar in the upper part of the picture. With this set of coins, what is good and what is bad is clear at a glance.
Eight, the biggest visual difference between refined and popular is the three towns of Xiao, Zhu De, Zhou Enlai, Liu Shaoqi, Dunhuang and CPPCC. Deng Xiaoping, deputy to the National People's Congress, Chen Yun, there is little difference on the surface of currency, but there is a "J" difference on the edge of currency.
Collectors of fine coins all know that collectors used to call the fine coins before Zhu De as early coins, and the fine coins bound by Kangyinge in Zhu De as late coins. The factory records of Shenyang Mint clearly recorded the casting quantity of some varieties of early refined coins. The minimum number of species is 40 years after the founding of the People's Republic of China 1000, and there are 2,000 in Inner Mongolia and 4 million giant pandas, which are quite different. Later refined coins were uniformly bound and issued by Kangyinge, with a circulation of 20,000 sets (40,000 sets in the new century and 40,000 sets in the 50 years after the founding of the People's Republic of China), some of which were directly indicated on the packaging, and some were reflected in the certificates. Kangyinge Company is a RMB binding company approved by the People's Bank of China, and it is also the only company that can bind refined coins at present. In addition to the paper card packaging of Kangyinge, there are also wooden boxes of refined coins on the market, which are bound for the People's Bank of China, and the circulation quantity is very small. First of all, it must be clear that the circulation of refined coins is included in the circulation of ordinary commemorative coins. Refined coins are a version of ordinary commemorative coins, and they are not divorced from the attributes of ordinary commemorative coins, but the processing molds and processes of refined coins are different. These have been verified in the reply of China People's Bank to refined coin lovers. The processing cost of refined coins is higher than that of ordinary coins, and the People's Bank of China stipulates that they must be bound before they can be issued, so the face value of refined coins cannot be recovered. Generally, the issue price of 1 yuan is 15 yuan/piece, and the issue price of 5 yuan currency is 20 yuan/piece.
The refined coins in the gift package are all bound by the People's Bank of China, and they are certified by the People's Bank of China. The certificate has no number. It is a gift from the leaders of the central bank. There has been no public offering, and there are few in circulation in the market. A variety in the hands of collectors is only a few dozen sets at most. Many species known now are "orphans". For example, the second set of Deng Xiaoping gift packages and NPC gift packages have not been found, which is related to the fact that refined coins are now in the initial stage of collection. With the development of refined coins,
Excerpt from: Katunger Blog 2008.03