304 stainless steel is a common material in stainless steel, with a density of 7.93 g/cm3, also known as 18/8 stainless steel in the industry. High temperature resistance 800℃, with good processing performance, high toughness characteristics, widely used in industrial and furniture decoration industry and food and medical industry. Common labeling methods on the market include 0Cr18Ni9 and SUS304, of which 0Cr18Ni9 generally indicates national standard production,304 generally indicates ASTM standard production, and SUS304 indicates daily standard production.
304 is a versatile stainless steel, which is widely used in the manufacture of equipment and parts requiring good comprehensive properties (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 18% chromium and more than 8% nickel content.304 stainless steel is a grade of stainless steel produced in accordance with the ASTM standard.
What does 304 stainless steel mean?
304 is equivalent to China's 06Cr19Ni10 stainless steel (GB/T 20878-2007).
Although this kind of stainless steel is very common in the country, the name "304 stainless steel" comes from the United States. Many people think that 304 stainless steel is a model name in Japan, but strictly speaking, the official name of 304 stainless steel in Japan is "SUS304". There are three common marking methods on the market: 06Cr19Ni10,304,SUS304, of which 06Cr19Ni10 generally indicates national standard production,304 generally indicates ASTM standard production, and SUS304 indicates daily standard production.
The difference between 304 stainless steel and 400 series stainless steel?
1. 304 stainless steel is austenitic stainless steel,400 series is martensitic stainless steel.
2. 304 stainless steel is not magnetic,400 series magnetic; 410 belongs to the 400 series stainless steel.
3. generally speaking, 304 will be better rust and corrosion resistance; In some special places, 410 is better than 304;
For example, some need relatively high hardness but do not need good rust prevention ability and do not need corrosion resistance, then 410 will be much better.
400 series of stainless steel can be heat treated to improve the hardness, now do tableware generally 400 series for low-end products,304 for high-end products, and some high-end 304 tableware will use 316L material.
4. 304 is chromium containing stainless steel,400 series is chromium containing stainless steel.
5. from the price point of view, 304 stainless steel is also more expensive than 400.
For example :400 series of stainless steel material is to be used with induction cooker.304 stainless steel, induction cooker can not be used, so the outermost layer of the composite bottom of the pot should be 400 series of stainless steel, 304 stainless steel inside, aluminum in the middle. Of course, now the cheap pot, the inside will use 201.202 series stainless steel.
Advantages of 304 stainless steel
1. Environmental hygiene: eliminate red water, blue and green water, and hidden water problems, no odor, no harmful substances precipitation to keep the water pure, lead-free harmless to human health.
2. Wear resistance: the surface is beautiful, clean and bright, durable, no scratches, never rust, never break. 3. Low temperature resistance: kitchen bathroom stainless steel water pipes, faucet corner valves never break.
4. Excellent thermal expansion performance and insulation performance: stainless steel pipe has slow thermal expansion and cold contraction, good insulation performance.
5. Authoritative certification: The precipitation amount of stainless steel metal elements is lower than 5% of the standard value stipulated by WHO and European drinking water laws.