Features: low price, excellent process performance (such as weldability and cold formability).
Application: general engineering structures and general mechanical parts.
The difference between ordinary carbon steel and stainless steel
Ordinary carbon steel, also known as iron-carbon alloy, is divided into low carbon steel (to be called wrought iron), medium carbon steel and cast iron according to the level of carbon content. Generally, those with a carbon content of less than 0.2% are called low-carbon steel, commonly known as wrought iron or pure iron; those with a carbon content of 0.2-1.7% are called steel; those with a content of more than 1.7% are called pig iron.
The chromium content in steel is more than 12.5%, and the steel with high resistance to external medium (acid, alkali salt) corrosion is called stainless steel. According to the structure of the steel, stainless steel can be divided into martensitic, ferritic, austenitic, ferritic-austenitic, and precipitation hardening stainless steels. According to the national standard GB3280-92, there are 55 regulations in total. .
Due to the difference in the composition of the two types of stainless steel, the microstructure of the built-in metal is also different. Austenitic stainless steel is due to the addition of high chromium and nickel (containing about 18% chromium and more than 4% Ni) in the steel, and the internal structure of the steel presents a state called austenite, which is Non-magnetic, cannot be attracted by magnets. It is often used as decorative materials, such as stainless steel pipes, handsome racks, tableware, stoves, etc.
Stainless steel for making knives and scissors should use martensitic stainless steel. Because the knives and scissors have the function of cutting objects, they must have sharpness, and to have sharpness, they must have a certain hardness. This kind of stainless steel must undergo heat treatment to make its internal structure change and increase its hardness before it can be used as knives and scissors. However, the internal structure of this type of stainless steel is tempered martensite, which has magnetic conductivity and can be attracted by magnets. Therefore, it is not possible to simply use whether it is magnetic to indicate whether it is a stainless steel material.
Ordinary steel is actually carbon steel, also known as iron-carbon alloy. According to the level of carbon content, it can be divided into low carbon steel, medium carbon steel and cast iron. Stainless steel generally contains more than 12.5% ??chromium in the market, and stainless steel has very high resistance to acid, alkali and salt corrosion. Stainless steel is generally divided into martensitic, ferritic and austenitic types according to the structure. Therefore, the difference between ordinary steel and stainless steel is still very large.
There are two types of stainless steel that are more common in the current stainless steel market, one is austenitic stainless steel, which can also be called nickel stainless steel, and the second is martensitic stainless steel, which can also be called stainless steel, but stainless steel This name is unscientific. Stainless steel generally adds a lot of chromium and nickel to the steel, so a structure called austenite will appear in the internal structure of the steel, which is non-magnetic. So this kind of stainless steel is generally used as decorative materials. Martensitic stainless steel can generally be used to make scissors. This kind of stainless steel is generally changed by heat treatment to change the internal structure, so this structure is magnetic. From here we can know that the authenticity of stainless steel cannot be judged simply by whether the stainless steel is magnetic or not.
Lihua was found in 1986 and has become a leading carbon steel manufacturer of houseware & small furniture now. Our product categories include: Living Room Furniture, Home Office Furniture, Bathroom Houseware, Bedroom Furniture, Kitchen Furniture. Main products include Houseware multifunctional storage rack, assembled Coffee Table, side table, computer table, desk, chair, dining table, 3-layer shelf, 4-layer shelf, 5-layer shelf, wall shelf, tissue tube, storage basket, carrying basket,laundry rack, and so on. For more information, please contact us:
Tel: 86-750-3132281
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