3 16L is a kind of stainless steel containing molybdenum. Because the steel contains molybdenum, its overall performance is better than that of 3 10 and 304 stainless steel. At high temperature, when the concentration of sulfuric acid is lower than 15% or higher than 85%, 3 16L stainless steel is widely used. 3 16L stainless steel also has good chloride corrosion resistance, so it is usually used in marine environment.
Characteristics of 3 16L stainless steel
1) Cold-rolled products have good gloss and beautiful appearance;
2) Due to the addition of Mo, the corrosion resistance, especially pitting resistance, is excellent;
3) Excellent high temperature strength
4) Excellent work hardening (weak magnetism after processing)
5) No magnetism in solid solution state;
6) Compared with 304 stainless steel, the price is higher.
Extended data:
The corrosion resistance of 3 16L stainless steel is better than that of 304 stainless steel, and it has good corrosion resistance in pulp and paper production. Moreover, 3 16L stainless steel is also resistant to the corrosion of ocean and corrosive industrial atmosphere.
3 16L stainless steel has good oxidation resistance in intermittent use below 1600 degrees and continuous use below 700 degrees. Within the range of 800- 1575 degrees, it is best not to move continuously. 3 16L stainless steel, but when 3 16L stainless steel is used continuously outside this temperature range, the heat resistance of stainless steel is good. The carbide precipitation resistance of 3 16L stainless steel is better than that of 3 16 stainless steel, and all the above temperature ranges can be used.
Solution annealing is carried out in the temperature range of1010-150 degrees, and then rapid cooling is carried out. 3 16L stainless steel cannot be hardened by overheating. 3 16L stainless steel has good weldability. All standard welding methods can be used for welding.
According to the application, 3 16Cb, 3 16L or 309Cb stainless steel filler rod or covered electrode can be used for welding. In order to obtain the best corrosion resistance, the welded part of 3 16 stainless steel needs to be annealed after welding. If 3 16L stainless steel is used, post-weld annealing is not required.
Origin of stainless steel:
The invention and use of stainless steel can be traced back to the First World War. Henry buhrer, a British scientist, was commissioned by the British military arsenal to study the improvement of weapons. At that time, the rifle bore used by soldiers was very easy to wear, and buhrer wanted to invent an alloy steel that was not easy to wear.
The stainless steel invented by buhrer Leigh was patented in Britain in 19 16, and mass production began. Since then, stainless steel accidentally found in garbage has swept the world, and Henry buhrer Leigh is also known as the "father of stainless steel". During the First World War, British guns on the battlefield were always transported back to the rear because the bore was worn out and could not be used. The Ministry of Military Production ordered Lieutenant Li to develop high-strength wear-resistant alloy steel to solve the problem of gun bore wear.
Li and his assistant collected all kinds of steels and alloy steels with different properties produced at home and abroad, conducted performance tests on machines with different properties, and then chose the steel that is more suitable for manufacturing guns. One day, they experimented with a domestic alloy steel containing a lot of chromium. After the wear-resistant experiment, it was found that this alloy was not wear-resistant, which indicated that guns could not be made. So they recorded the experimental results and threw things at the corner.
One day a few months later, an assistant came to Bougel with a shiny piece of steel and said, "Sir, this is the alloy steel that Mr. Mullah sent me when I was cleaning the warehouse. Do you want to try it and see what special effect it has? " "good!" Buhrer looked at the bright steel and said happily.
The experimental results show that it is a stainless steel that is not afraid of acid, alkali and salt. This kind of stainless steel was invented by Mullah in Germany in 19 12. However, the mullahs don't know what this stainless steel is for.
Li thought: "This kind of steel which is not wear-resistant but corrosion-resistant can't be used to make guns. Can it be used as tableware? " He did as he said, and made stainless steel fruit knives, forks, spoons, fruit bowls and folding knives.
Baidu encyclopedia -3 16L stainless steel