Grades 304 and 430 are commonly used stainless steel materials. 304 stainless steel is a general type of chromium-nickel austenitic stainless steel, the density of 7.93 g/cm3, also known as 18/8 stainless steel, is the 300 series of stainless steel which is the most commonly used steel. It can withstand high temperatures of 800 °C, has good processing performance and hardness, widely used in the requirements of equipment and parts of good integral performance (corrosion resistance and molding). 304L is a low-carbon version of 304, which does not require post-weld annealing, so it is widely used for thick gauge parts (about 5mm and more). The higher carbon content of 304H can be used at high temperatures. The annealed austenite structure also gives these grades excellent toughness, even at low freezing temperatures.
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