RS-2 (0Cr20Ni26Mo3Cu3Si2Nb)
RS-2 sulfuric acid resistant stainless steel is a Cr Ni Mo Cu austenitic stainless steel gradually evolved in the past 60 years. The characteristic of this steel is to improve the corrosion resistance of stainless steel in sulfuric acid and other media by using the complex effect of trace elements to improve the performance of stainless steel passive film without increasing the total amount of alloy.
Equivalent Grades
| Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
| RS-2 | 00Cr25Ni20Mn3Mo3N | – | – | – | – | – | – | – | – | – |
Chemical Composition, %
| Alloy | C | Si | Mn | P | S | Cr | Ni | Mo | Cu | Fe |
| RS-2 | ≤0.06 | ≤2.0 | ≤1.0 | ≤0.035 | ≤0.030 | 17.0-22.0 | 24.0-28.0 | 2.0-3.0 | 2.0-3.0 | Bal |
Typical Physical and Mechanical Properties (RT, Annealed)
| Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HRB |
| 8.0 | 1130-1280 | ≥568 | ≥313 | ≥35 | / |
Available Products and Specifications
| Rod, Bar, Wire and Forgings | ASTM A182 |
| Plate, Sheet and Strip | ASTM A312 |
| Pipe and Tube | ASTM A167, 240 |
| Welding Product | – |
| Others | ASTM A403 |
Features
This is an austenitic stainless steel with low alloy content and good corrosion resistance
Applications
The castings of plate heat exchanger, wire mesh demister and acid resistant pump made of this material are widely used in sulfuric acid, phosphoric acid and phosphate fertilizer industries.
