Centerway Steel Co., Ltd
Centerway Steel Co., Ltd
Centerway Steel Co., Ltd
carbon steel plate,steel coil,stainless steel plate,china export service provider.
carbon steel plate,steel coil,stainless steel plate,china export service provider.
Both 304 stainless steel and 321 stainless steel are austenitic stainless steel
|
The difference between 304 and 321 stainless steel |
304 stainless steel plate |
321 stainless steel plate |
|
Features |
Corrosion resistance, good toughness |
Corrosion resistance, high temperature resistance, creep resistance |
|
Grade |
0Cr18Ni9（0Cr19Ni9） 06Cr19Ni9 S30408 |
X10CrNiTi189 321、S32100、TP321 SUS321 |
|
chemical composition |
C：≤0.08 ，Si ：≤1.0 Mn ：≤2.0 ， Cr ：18.0～20.0 ，Ni ：8.0～10.5， S ：≤0.03 ，P ：≤0.035 N≤0.1 |
Sulfur: 0.030, Nickel: 9.00-12.00, Chromium: 17.00-19.00, Titanium: 5C-0.70 |
|
Tensile strength (Mpa) |
520 |
≥520 |
|
Conditional yield strength (MPa) |
205-210 |
≥205 |
|
Elongation(%) |
40% |
≥40 |
|
hardness |
HB187 HRB90 HV200 |
≤187HB;≤90HRB;≤200HV |
|
density |
7.93 g/cm3 |
7.93 g/cm3 |
|
theoretical weight |
Weight (kg) = thickness (mm) * width (m) * length (m) * density value |
Weight (kg) = thickness (mm) * width (m) * length (m) * density value |
|
use |
Tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs, auto parts, medical appliances, building materials, chemicals, food industry, agriculture, ship parts. |
Field open-air machines for the chemical, coal, and petroleum industries |
As can be seen from the above table, the main difference is that 304 does not contain Ti, and 321 contains Ti. Ti can prevent stainless steel from being sensitized. Generally speaking, it is to improve the high-temperature service life of stainless steel. 304 stainless steel plate is more suitable.
The appearance and physical properties of 304 and 321 stainless steel are very similar, only slightly different in chemical composition:
First of all, 321 stainless steel requires a trace amount of titanium (Ti) element (according to ASTM A182-2008 standard, its Ti content should not be less than 5 times of carbon (C) content, but not less than 0.7%, another note, 304 and The carbon (C) content of 321 is 0.08%), while 304 does not contain titanium (Ti).
Secondly, the requirements for nickel (Ni) content are slightly different, 304 is between 8% and 11%, while 321 is between 9% and 12%.
Third, the requirements for chromium (Cr) content are different. 304 is between 18% and 20%, while 321 is between 17% and 19%.
