The following table lists the chemical composition of SS304 in various standards. So you can use metal material analyzer or chemical analysis method to verify the composition of these two materials and make judgments.304 Stainless Steel Composition (SS304 Chemical Composition)ģ04 stainless steel composition contains 18% chromium and 8% nickel, so it is also known as 18-8 steel. 304 is between 8% and 11%, while 321 is between 9% and 12%.ģ) the requirements for chromium (Cr) content are different. The appearance and physical properties of 304 and 321 stainless steel are very similar, except for the slight difference in chemical composition:ġ) 321 stainless steel requires trace amounts of titanium (Ti) (according to the ASTM A182-2008 standard, the Ti content should not be less than 5 times the carbon (C) content, but not more than 0.7%, another note, 304 and 321 The carbon (C) content is 0.08%, and 304 does not contain titanium (Ti).Ģ) the requirements for nickel (Ni) content are slightly different. 304 stainless steel plate is more suitable. Generally speaking, it can improve the high temperature service life of stainless steel. Ti can prevent stainless steel from sensitizing. Outdoor machines for the chemical, coal, and petroleum industries.Īs can be seen from the above table, the main difference is that 304 does not contain Ti, and 321 contains Ti. Due its composition consists of 18 percent chromium and 8. Tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs,Īuto parts, medical appliances, building materials, chemicals, food industry, agriculture, and ship parts. The austenitic stainless steel known as Type 304 is the most popular choice for everyday applications. Weight (kg) = thickness (mm) * width (m) * length (m) * density value Compared with 304 alloy, 321 stainless steel has better ductility and resistance to stress fracture. 321 stainless steel has advantages in high temperature environment due to its excellent mechanical properties. The higher the carbon content the greater the yield strength. The real difference is their carbon content. They different by a very very small addition of Titanium.
The titanium element in 321 stainless steel makes it more resistant to chromium carbide formation.ģ21 stainless steel is basically from 304 stainless steel. Also recommended for parts to be used at temperatures between 800☏ and 1850☏ (427 to 816☌), have good properties resistance to intergranular corrosion. Recommended for parts fabricated by welding which cannot be subsequently annealed. 304L grade Low Carbon, typically 0.035% Maxģ04 grade Medium Carbon, typically 0.08% Maxģ04 stainless steel and 321 stainless steel belong to the 300 stainless steel series.ģ04 stainless steel is low carbon chromium nickel stainless and heat resisting steel somewhat superior to Type 302 in corrosion resistance.ģ21 stainless steel is known as stabilized grades of stainless steel, is Chromium nickel steel containing titanium. Updated: DecemTable of Contents 304 Grade Stainless Steel 316 Grade Stainless Steel 304 vs 316 Stainless Steel 7 Differences 1.
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