Today is an era of rampant stainless steel, many things are made of stainless steel. Such as kitchen utensils, medical appliances, building materials, public facilities, etc. Of course, stainless steel is just a general term for one type of steel, and it is also divided into many types. There are four main types that people use the most.
These four types of stainless steel are 304, 304L, 316 and 316L, but many people are not very clear about the difference between them. Do you know the difference between these types of steel? First, let's take a look at what the L behind the number means.
Although people only speak of stainless steel, stainless steel can be welded in addition to corrosion resistance. There are many stainless steel welds in life now. If you want to weld, there are certain requirements for the carbon content in stainless steel. If the carbon content inside is high, intergranular corrosion will occur during welding, which is what carbon combines under high temperature. After the appearance of crystal corrosion, it is not obvious from the appearance in a short period of time, but after a period of time, as long as a slight external force is applied, the weld will crack.
In order to solve this problem, people took part of the carbon in the stainless steel. If there is no L in the back, this kind of steel is not decarbonized, and the weldability is also worse. Then two kinds of stainless steels, 304 and 316, are two kinds of steels with certain differences in performance strength. The corrosion resistance of 304 steel is very good, but more molybdenum is added to 316 steel, so its corrosion resistance and strength are greater than 304.
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