Special Products
Specially Designed Products
Super Duplex 32760
Super Duplex UNS 32760 has excellent corrosion resistance to a wide variety of media, with outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with Critical Pitting Temperature exceeding 50°C.
Providing higher strength than both austenitic and 22% Cr Duples Stainless Steels 32760 is suited to a variety of applications in industries such as Chemical Processing, Oil & Gas, and Marine environments.
Super Duplex UNS 32760 is listed in NACE MR 01 75 for sour service and having gained ASME Approval for Pressure Vessel applications.
Providing higher strength than both austenitic and 22% Cr Duples Stainless Steels 32760 is suited to a variety of applications in industries such as Chemical Processing, Oil & Gas, and Marine environments.
Super Duplex UNS 32760 is listed in NACE MR 01 75 for sour service and having gained ASME Approval for Pressure Vessel applications.
Chemical Specification
| Elements | C | Cr | Cu | Fe | Mo | Mn | N | Ni | P | S | Si | W |
| Minimum | 24.0 | 0.5 | REMAINDER | 3.0 | 0.20 | 6.00 | 0.50 | |||||
| Maximum | 0.030 | 26.00 | 1.0 | 4.0 | 1.0 | 0.30 | 8.00 | 0.030 | 0.010 | 1.00 | 1.00 |
Mechanical Properties
| 0.2% Proof Stress (N/mm2 ) [ksi] minimum | 550 [79.8] |
| Ultimate Tensile Strength (N/mm2) [ksi] minimum | 750 [108.8]] |
| Elongation (%) minimum | 25 |
| Hardness (HBN) | 270max |
| Reduction of Cross Section Area (%) minimum | 45 |
| Charpy V-notch Impact at ambient Temp (J) [ft.lb] | 80min [59min] |
| Charpy V-notch Impact at -46°C (J) [ft.lb] | 45av, 35min [33av, 25.8min] |
| Additional Testing | |
| ASTM G48A Corrosion test at 50°C | No pitting and weight loss <0.8g/m2 |
| Ultrasonic Testing | According to ASTM A388 |
| Ferrite Content | 35%-55% |
| Microstructure | Microstructure certified free from grain boundary carbides, sigma, chi and laves phases |
Physical Properties
| Density (Kg.m-3) | 7810 |
| Magnetic Permeability | 33 |
| Young’s Modulus (N/mm2) | 199 x 103 |
| Fracture Toughness, KQ (MPa.m½) | 98 |
| Specific Heat, 20°C (J.Kg-1.°K-1) | 475 |
| Specific Electrical Resistance, 20°C (µO.m) | 0.80 |
| Thermal conductivity, 20°C (W.m-1.°K-1) | 14.2 |
| Mean coefficient of thermal expansion, 20-100°C (°K-1) | 11.1 x 10-6 |
Key Features
- High strength compared to austenitic and 22% chrome duplex stainless steels
- Excellent corrosion resistance in a wide variety of corrosive chemicals including seawater and industrial acids
- Excellent ductility and impact strength at both ambient and sub-zero temperatures
- High resistance to abrasion, erosion and cavitation erosion Excellent resistance to stress corrosion cracking
- Applicable for sour service operation
- Specified for pressure vessel applications