Stainless steel grades according to AISI, GOST. Table of compliance with DIN, SMS, ISO, GOST. Chemical composition of stainless steel EN, AISI, ASTM
The most common steel grades according to AISI and their scope of application
AISI 304 |
The most common brand of steel in everyday life. It is used in the manufacture of furniture, structures, interior items, decor, in equipment for the food and pharmaceutical industries, in mechanical engineering and construction. |
AISI 321 |
This brand is most often used in pipelines working under pressure: pipes, pipeline parts, tees, bends, flanges, transitions, shut-off valves, heat exchangers, collectors. |
AISI316 |
Elements and details of pipelines and structures operating in environments with a high content of alkalis, solutions of salts and acids. All installations and units located in highly aggressive environments. |
08X18H10 |
It is recommended for the manufacture of welded products operating in environments of less high aggressiveness than steel grades 12X18N10T and 12X18N12T. Steel has a reduced resistance to intercrystalline corrosion compared to steel 12X18N10T and 12X18N12T. Pipes, pipeline parts and fittings, heat exchangers, muffles, retorts, pipes, exhaust manifolds, welded apparatuses and vessels of chemical engineering |
10X17H13M2T |
It is recommended for the manufacture of welded structures operating in boiling phosphoric, sulfuric, 10% acetic acid and sulfuric acid environments. Devices and vessels operating in environments of increased aggressiveness. The blades of the gas blower, stamped from sheet steel, rivets made by the method of hot landing, forging discs, tires, shafts and other parts of compressor machines, turbine parts. |
12X18H10T |
Details and components of the main equipment and pipelines of the AEU with a water coolant. Blades, pipes and other parts of power engineering, operating at temperatures up to +600 °C. Welded apparatuses and vessels operating in dilute solutions of nitric, acetic, phosphoric acids, solutions of alkalis and salts; adsorber bottoms, regenerators, heat exchangers, etc. Housings and other parts working under pressure at temperatures from -196 °C to +600 °C, and in the presence of aggressive media up to+350 °C. |
Stainless steel is a corrosion-resistant steel, a type of alloy steel, resistant to corrosion in the atmosphere and aggressive environments due to the chromium content of 12% or more. There are various brands of stainless steels on the market. The most common steel grades are AISI 304, AISI316 and AISI 321.
AISI304 (08X18H10)
The most common and most popular brand of steel. Steel of this brand is used in many industries.This brand is also used in the food, chemical and pharmaceutical industries. It is well processed and has good corrosion resistance indicators.
AISI316 (10X17H13M2)
Stainless steel of this brand has higher corrosion resistance to aggressive environments. This brand is used in those industries where the use of AISI 304 is not possible. This brand is more often used in chemical industry enterprises where alkalis and acids are used.
AISI321 (12X18H10T)
The steel of this brand also has good corrosion resistance indicators. It is also well processed and weldable, like the previous two. Most often, this brand of steel is used in products that have higher requirements for mechanical properties and heat resistance.
Compliance table DIN, SMS, ISO, GOST | |||||
Standard | DIN | SMS | ISO | GOST | |
Nominal diameter, inch | Nominal diameter (DN, DN), mm | Outer diameter, mm | Outer diameter, mm | Outer diameter, mm | Outer diameter, mm |
1 / 8" | 5 | 10.3 | 6 | ||
1 / 4" | 8 | 6.35 | 13.7 | 8 | |
3 / 8" | 10 | 12 (13) | 9.54 | 17.1 | 10 |
1 / 2" | 15 | 18 (19) | 12.7 | 21.3 | 14 |
3 / 4" | 20 | 22 (23) | 19.05 | 26.9 | 18 |
1" | 25 | 28 (29) | 25 | 33.7 | 25 |
1 1 / 4" | 32 | 34 (35) | 31.75 | 42.4 | 38 |
1 1 / 2" | 40 | 40 (43) | 38 | 48.3 | 45 |
2" | 50 | 52 (53) | 50.8 | 60.3 | 57 |
2 1 / 2" | 65 | 70 | 63.5 | 76.1 | 76 |
3" | 80 | 85 (84) | 76.1 | 88.9 | 89 |
4" | 100 | 104 | 101.6 | 114.3 | 108 |
5" | 125 | 129 | 129 | 139.7 | 133 |
6" | 150 | 154 | 154 | 168.3 | 159 |
8" | 200 | 204 | 204 | 219.1 | 219 |
10" | 250 | 254 | 254 | 273 | 273 |
12" | 300 | 323.9 | 325 | ||
14" | 350 | 355.6 | 377 | ||
16" | 400 | 406.4 | 426 | ||
20" | 500 | 508 | 530 | ||
24" | 600 | 609.6 | 630 | ||
28" | 700 | 711.2 | 730 | ||
32" | 800 | 812 | 820 |
Type of steel | Steel grade according to EN | Steel grade according to AISI/ASTM | Designation | Chemical composition of steel | ||||||||
steel | C | Si | Mn | P max | S | N | Cr | Mo | Ni | |||
Austenitic steel |
1.4301 | 304 | X5CrNi18-10 | ≤0,07 | ≤1,00 | ≤2,00 | 0.045 | ≤0,015(2) | ≤0,11 | 17,50 - 19,50 | 8,00 - 10,50 | |
Austenitic steel |
1.4541 | 321 | X6CrNiTi18-10 | ≤0,08 | ≤1,00 | ≤2,00 | 0.045 | ≤0,015(2) | 17,00 - 19,00 | 9,00 - 12,0 | ||
Austenitic steel |
1.4401 | 316 | X5CrNiMo17-12-2 | ≤0,07 | ≤1,00 | ≤2,00 | 0.045 | ≤0,015(2) | ≤0,11 | 16,50 - 18,50 | 2,00 - 2,50 | 10,00 - 13,00 |