2507 is a super duplex stainless steel with higher alloy content, thus making it superior to 2205 in corrosion resistance and strength. It has excellent resistance to uniform, pitting, crevice corrosion and chloride stress corrosion cracking. In dilute sulfuric acid contaminated with chloride ions, 2507 has better corrosion resistance than 904L, which is specially designed to resist pure sulfuric acid. Because 2507’s low carbon content greatly lowers the risk of carbide precipitation at the grain boundaries during heat treatment, it is highly resistant to carbide-related intergranular corrosion. 2507 is not suitable for applications which require long exposure to temperatures above 300℃ because of the increased risk of a reduction in toughness. Its yield strength is about twice that of conventional austenitic stainless steels.
Chinese designation: 2507 超双相不锈钢
| Element | Min % | Max % |
|---|---|---|
| Cr | 24 | 26 |
| Ni | 6 | 8 |
| Mo | 3 | 5 |
| Mn | — | 1.2 |
| Si | — | 0.8 |
| Cu | — | 0.5 |
| N | 0.24 | 0.32 |
| P | — | 0.035 |
| C | — | 0.03 |
| S | — | 0.02 |
| Fe | balance | — |
Chemical composition per the grade specification. Values are nominal; the certified analysis is issued with every order on EN 10204 3.1 documentation.
| Product form | ASTM / EN specification |
|---|---|
| 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 |
2507 (UNS S32750, DIN W. Nr. 1.4410) is a stainless steels grade. 2507 is a super duplex stainless steel with higher alloy content, thus making it superior to 2205 in corrosion resistance and strength. It has excellent resistance to uniform, pitting, crevice corrosion and chloride stress corrosion cracking. In dilute sulfuric acid contaminated with chloride ions, 2507 has better corrosion resistance than 904L, which is specially designed to resist pure sulfuric acid. Because 2507’s
ROBAN supplies 2507 as rod, bar and shape, plate, sheet and strip, seamless and welded pipe, seamless and welded tubing, fitting, with custom dimensions to your drawing.
Yes. Every order ships with EN 10204 3.1 material certification covering the actual heat analysis. 3.2 documentation is available where the contract requires it.
Stock items ship within 3 to 7 working days. Cut-to-size and forged items typically run 15 to 30 working days depending on quantity and specification. Send us your drawing or enquiry for a firm lead time.
Drawing, grade, dimensions, quantity and delivery date — we price from those.
Request a Quote →Heat analysis certificate issued with every order at no extra charge.
Quality documentation →Shearing, sawing and machining to the tolerances on your drawing.
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