Stainless steel of tube number comparision between china and international

Stainless steel pipe is one of the more standardized materials in the building and engineering industries.

Standard Classifications:

Some grades are not covered by standard numbers and could be proprietary grades or be named using standards for specialist products like welding wire.

The old AISI three digit stainless steel numbering system (e.g. 304 and 316) is still commonly used. New grades are defined under the SAE and ASTM system that uses a 1-letter + 5-digit UNS number. An example of this is the new term for 304, which is S30400. Other designations include old BS numbers like 304S31 and occasionally old wartime Emergency Numbers such as ‘EN’ 58E.

316L Stainless steel pipes

Grade Selection:

The grade selection process for stainless steels is a compromise between the desired properties of the finished product.

Type Grade of steel Specification Common
DIN17006 DIN17007 D-SMM Standare
Stainless steel seamless pipe 0Cr18Ni9 304/S30400 SUS304 X5CrNi18-10 1.4301 Ф6-350mm
00Cr19Ni10 304L/S30403 SUS304L X2CrNi19-11 1.4306 GB/T14976-2002
00Cr25Ni20 310S/31008 SUS310S X12CrNi25-21 1.4845 GB13296-91
0Cr17Ni12Mw2 316/S31603 SUS316 X5CrNiMo17-12-2 1.4401  
00Cr17Ni14Mo2 316L/S31603 SUS316L X2CrNiMo18-14-3 1.4435 ASTM A312/A213M
0Cr19Ni13Mo3 317/S31700 SUS317 X5CrNiMo11-13-3 1.4449 ASTM A312/A312M
00Cr19Ni13Mo3 317L/S31703 SUS317L X2CrNiMo18-16-4 1.4438 JIS G3459
1Cr18NI9ti 321/S32100 SUS321 X12CrNiti18-9 1.4878 DIN2462
0Cr18Ni10ti - - X6CrNiti18-10 1.4541 -
0Cr18Ni11Nb 347/S34700 SUS347 X12CrNiNb18-10 1.4550 -
Stainless steel welded pipe 0Cr18Ni9 304/S30400 SUS304 5CrNi18-10 1.4301 Ф19-1000mm
0Cr19Ni10 304L/S30403 SUS304L X2CrNi19-11 1.4306 GB/T12771-200
0Cr25Ni20 310S/31008 SUS310S X12CrNi25-21 1.4845 HG20537.2-92
0Cr17Ni12Mo2 316/S31603 SUS316 X5CrNiMo17-12-2 1.4401 HG20537.3-92
00Cr17Ni14Mo2 316L/S31603 SUS316L X2CrNiMo18-14-3 1.4435 HG20537.4-92
0Cr19Ni13Mo3 317/S31700 SUS317 X5CrNiMo11-13-3 1.4449 -
00Cr19Ni13Mo3 317L/31703 SUS317L X2CrNiMo18-16-4 1.4438 ASTM A312/A312M
1Cr18Ni9ti 321/S32100 SUS321 X12CrNiti18-9 1.4878 ASTM A688/A688M
0Cr18Ni10ti - - X6CrNiti18-10 1.4541 JIS G3468
0Cr18Ni11Nb 347/S34700 SUS347 X12CrNiNb18-10 1.4550 DIN2462

When selecting a particular grade of stainless steel, it is essential to consider the primary properties required, such as corrosion resistance and heat resistance. Important consideration must also be given to the secondary properties, like physical and mechanical properties. These properties will determine other factors such as the ease of fabrication of any candidate grades.