2507 Stainless Steel(UNS S32750/DIN W. Nr. 1.4410)
2507 is a super duplex stainless steel with high alloy content, giving it superior corrosion resistance and strength compared to 2205 steel. The material avoids pitting, crevice corrosion, and chloride stress corrosion cracking. When exposed to diluted sulfuric acid contaminated with chloride ions, 2507 demonstrates better corrosion resistance compared to 904L, which is a metal specially designed to resist concentrated sulfuric acid.
Thanks to 2507’s low carbon content, the risk of carbide precipitation at the grain boundaries during heat treatment is significantly lowered. This also makes it more resistant to carbide-related intergranular corrosion.
However, 2507 is not suitable for applications in which it will be exposed to temperatures greater than 300℃. Its yield strength is about twice that of conventional austenitic stainless steels.
Chemical processing industry piping, vessels and heat exchangers; desalination plant seawater piping; oil and gas industry equipment; power plant flue gas desulfurization systems, scrubber systems and absorber towers; and chemical tankers.
| Form | ASTM |
| Rod, bar and shape | A 276, A 484 |
| Plate, sheet and strip | A 240, A 480 |
| Seamless and welded pipe | A 790, A 999 |
| Seamless and welded tubing | A 789, A 1016 |
| Fitting | A 815, A 960 |
| Forged or rolled pipe flange and forged fitting | A 182, A 961 |
| Billet and bar for forging | A 314, A 484 |
| % | Fe | Cr | Ni | Mo | C | Mn | Si | P | S | Cu | N |
| min | balance | 24.0 | 6.0 | 3.0 | 0.24 | ||||||
| max | 26.0 | 8.0 | 5.0 | 0.030 | 1.20 | 0.80 | 0.035 | 0.020 | 0.50 | 0.32 |
| Density | 7.75 g/cm3 |
| Melting range | 1396-1450℃ |
