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Standards
ASTM/ASME .......... A240 - UNS S32750
EURONORM............ 1.4410 - X2 Cr Ni MoN 25.7.4
AFNOR.................... Z3 CN 25.06 Az
Benefits of UNS32750 Super Duplex Stainless Steel
Crevice Corrosion
The presence of crevices, almost unavoidable in practical constructions and operations, makes stainless steels more susceptable to corrosion in chloride enviroments. 2507 is highly resistant to crevice corrosion. The critical crevice corrosion temperatures of 2507 and several other high-performance stainless steels are shown above.
Chemical Analysis
Typical values (Weight %)
| C | Cr | Ni | Mo | N | Others |
| 0.020 | 25 | 7 | 4.0 | .27 | S=0.001 |
| PREN = [Cr%] + 3.3 [Mo%] + 16 [N%] ≥ 40 | |||||
Mechanical Properties
Mechanical and Physical Properties
2507 combines high tensile and impact strength with a low coefficient of thermal expansion and high thermal conductivity. These properties are suitable for many structural and mechanical components. The low, ambient, and elevated temperature mechanical properties of 2507 sheet and plate are shown below. All of the test data shown are for samples in the annealed and quenched condition.
2507 is not recommended for applications which require long exposures to temperatures in excess of 5700F because of the increased risk of a reduction in toughness. The data listed here are typical for wrought products and should not be regarded as a maximum or minimum value unless specifically stated.
Mechanical Properties
| Ultimate Tensile Strength, ksi | 116 min. |
| 0.2% Offset Yield Strength 0.2%, ksi | 80 min. |
| 0.1% Offset Yield Strength 0.2%, ksi | 91 min. |
| Elongation in 2 inches, % | 15 min. |
| Hardness Rockwell C | 32 max. |
| Impact Energy, ft.-lbs. | 74 min. |
Low Temperature Impact Properties
| Temperature 0F | RT | 34 | -4 | -40 |
| Ft.-lbs. | 162 | 162 | 155 | 140 |
| Temperature 0F | -76 | -112 | -148 | -320 |
| Ft.-lbs. | 110 | 44 | 30 | 7 |
Elevated Temperature Tensile Properties
| Temperature 0F | 68 | 212 | 302 | 392 | 482 |
| 0.2% Offset Yield Strength, ksi | 80 | 65 | 61 | 58 | 55 |
| Ultimate Tensile Strength, ksi | 116 | 101 | 98 | 95 | 94 |
Physical Properties
| Density | lb/in3 | 0.28 |
| Modulus of Elasticity | psi x 106 | 29 |
| Coefficient of Thermal Expansion 68-2120F/0F | x10-6/0F | 7.2 |
| Thermal Conductivity | Btu/h ft 0F | 8.7 |
| Heat Capacity | Btu/lb/0F | 0.12 |
| Electrical Resistivity | W-in x 10-6 | 31.5 |
Duplex Steel 2205 UNS S31803 Products Stock At a Glance:-
Duplex Steel 2205 UNS S32205 Products Stock At a Glance:-
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