Super Duplex 2507
Super Duplex 2507 is a high-chromium, high-molybdenum, nitrogen-alloyed duplex stainless steel designed for very high resistance to chloride pitting, crevice corrosion and stress-corrosion cracking while retaining high mechanical strength.
Super Duplex 2507 Information
Super Duplex 2507 is a high-chromium, high-molybdenum, nitrogen-alloyed duplex stainless steel designed for very high resistance to chloride pitting, crevice corrosion and stress-corrosion cracking while retaining high mechanical strength.
Metallic winding and compatible ring components where service conditions are suitable.
| UNS Number | S32750 |
|---|---|
| EN / Werkstoff | 1.4410 |
| Material Type | Super-duplex ferritic-austenitic stainless steel |
| Common / Applicable Specification | ASTM A240 / A240M |
| Typical Gasket Use | Metallic winding and compatible ring components where service conditions are suitable. |
Super Duplex 2507 Chemical Composition
Reference composition limits are shown below. Exact requirements should be confirmed against the applicable product specification and certified material documentation.
| Element / Constituent | Symbol | Composition / Information |
|---|---|---|
| Carbon | C | 0.030 max. |
| Manganese | Mn | 1.20 max. |
| Silicon | Si | 0.80 max. |
| Phosphorus | P | 0.035 max. |
| Sulfur | S | 0.020 max. |
| Chromium | Cr | 24.0–26.0 |
| Nickel | Ni | 6.0–8.0 |
| Molybdenum | Mo | 3.0–5.0 |
| Nitrogen | N | 0.24–0.32 |
| Copper | Cu | 0.50 max. |
| Iron | Fe | Balance |
Super Duplex 2507 Mechanical Properties
Reference room-temperature properties are shown for a commonly supplied condition. Exact requirements depend on product form, size, heat treatment and governing specification.
| Property | Reference Value | Unit / Basis |
|---|---|---|
| Tensile Strength | 795 min. | MPa |
| 0.2% Offset Yield Strength | 550 min. | MPa |
| Elongation | 15 min. | % |
| Hardness | 310 max. | HBW |
Values shown are engineering reference data, not universal design allowables. Final procurement and design must use the governing specification, exact product form/condition and certified material test documentation.
Super Duplex 2507 Physical & Service Information
Reference physical properties and service considerations relevant to material selection for Spiral Wound Gaskets.
| Density | Approx. 7.8 g/cm³ |
|---|---|
| Structure | Super-duplex ferritic-austenitic |
| Corrosion Behaviour | Excellent resistance to chloride pitting, crevice corrosion and stress-corrosion cracking. |
| Heat Treatment | Normally solution annealed and rapidly cooled. |
| Service Selection | Control fabrication and thermal exposure to avoid detrimental intermetallic phase formation. |
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