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Home » Products » Alloy 32750
Specifications
- 1.4410
- X2CrNiMoN 25-7-4
- Z3CND25.07Az
- Norsok MDS D57
- ASTM A276/A476
- UNS S32750 (Super Duplex 32750)
- ASME A182 Duplex F53
- CE3MN (Cast grade)
- 25Cr
View Data Tables For This Product
Alloy 32750 is a super duplex stainless steel supplied in the solution annealed condition. As a super duplex stainless steel, it combines the desirable aspects of both austenitic and ferritic grades. The higher chromium, molybdenum and nitrogen contents result in a Pitting Resistance Equivalent number (PREN) of >41, providing pitting and crevice corrosion resistance superior to austenitic and duplex stainless steels in almost all corrosive media, and a Critical Pitting Temperature exceeding 50°C.
Supplied in the annealed condition, it achieves yield strengths of 80ksi (550Mpa), greater than most austenitic and duplex stainless steel grades. It cannot be hardened by heat treatment but can be strengthened by cold working. It also exhibits a low coefficient of thermal expansion and higher heat conductivity than austenitic steels and is suitable for working temperatures up to 300°C. Alloy 32750 is listed in NACE MR 0175 for sour service and having gained ASME Approval for Pressure Vessel applications it can be used in a wide variety of applications.
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Specifications
- 1.4410
- X2CrNiMoN 25-7-4
- Z3CND25.07Az
- Norsok MDS D57
- ASTM A276/A476
- UNS S32750 (Super Duplex 32750)
- ASME A182 Duplex F53
- CE3MN (Cast grade)
- 25Cr
View Data Tables For This Product
Data Tables
Chemical Composition:
| Cr | Ni | Mo | Co | Nb (+Ta) | Ti | V | W | Cu | C | Mn | N | Si | P | S | Fe | Al | |
| Min | 24.50 | 6.00 | 3.00 | 0.50 | 0.24 | 0.10 | |||||||||||
| Max | 26.00 | 8.00 | 5.00 | 0.50 | 0.03 | 1.20 | 0.32 | 0.80 | 0.035 | 0.020 | Bal |
Mechanical Properties:
| 0.2% Proof Stress | 550 N/mm2 | 79.8 ksi |
| Tensile Strength | 800 N/mm2 | 116 ksi |
| Elongation, 5.65√S0 | 25% | |
| Reduction of area | 45% | |
| Hardness (Brinell) | <270 | |
| Impact Strength (Room Temp) | 80J | |
| Impact Strength (-46oC) | Longitidinal 45J (35J min) | |
| Transverse 45J (35J min) | ||
Notes:
- Testing shall be carried out in accordance with ASTM A370 or EN ISO 6892-1 (tensile), EN ISO 6506-1 (hardness)
- Minimum properties quoted (tested at room temperature in a longitudinal direction)
- Testing performed on each melt of material per heat treatment batch
- Hardness shall be in accordance with NACE MR 1075 with a maximum HRC of 25
- ASTM G48A corrosion test (at 50°C) No pitting and < 3.0g/m2 weight loss (ASTM specification < 4.0g/m2)
- Ferrite content 35-55%
- Microstructure certified free from grain boundary carbides, sigma, chi and laves phases
Physical Properties:
| Density (Kg/m3) | 7810 |
| Magnetic Permeability (20°C) | 33 |
| Young’s Modulus (kN/mm2) | 199 |
| Specific Electrical Resistance, 20°C (µΩ.m) | 0.8 |
| Mean coefficient of thermal expansion, 20-300°C (m/m/oC) | 11.1 x 10-6 |
| Specific Heat, 20°C (J/kg.K) | 475 |
| Thermal conductivity, 20°C (W/m.K) | 14.2 |
Product Features
Key Features:
- Excellent corrosion resistance in a wide variety of corrosive chemicals
- Pitting Resistance Equivalent number (PREN) of >41
- Outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments
- Critical Pitting Temperature exceeding 50°C
- High strength compared to austenitic and 22%Cr duplex stainless steels
- 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 in chloride containing environments
- Listed in NACE MR 0175 for sour service
- ASME Approval for Pressure Vessel application
Applications:
- Process industry components in nitric acid, dioxide, polypropylene & PVC production, caustic evaporators
- Equipment handling organic & fatty acids
- Marine industry and shipbuilding propellers, shafts, rudders, shaft seals, pumps, bolts, fasteners, valves, instrumentation
- Oil and chemical tankers
- Oil & Gas industry pumps, valves, pipe, vessels, wellhead equipment, subsea equipment
- Pollution control systems, fans and pumps, wet scrubbers, incinerators, flue gas desulphurisation (FGD)
- Pulp & paper industry components such as black liquor heater tubes, digester blow valves, rotary feed valves, I.D.fans, brownstock washers, precipitators, bleaching components
- Food Industry applications including sugar cane centrifuges, corn and vegetable processing plant
- Agrochemicals production such as fertilisers (based on wet phosphoric acid)
- Sewage treatment, seawater cooling, desalination plants
Datasheet SD Alloy 32750 Bar (rev2)
Worldwide Delivery Available We can offer air, sea and road freight shipping options, with choice of packaging, to deliver to customers globally. Inventory Management Let us manage your total material requirements with call-off and consignment arrangements. Up to 40 sizes per alloy available More sizes equal less machining and a more cost-effective supply chain.
For enquiries and product information, please call us on +44 1782 610250 or email [emailprotected] to request a quote
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Langley Alloys Ltd
504-506 Lowfield DriveNewcastle-under-LymeStaffordshireST5 0UU
+44 1782 610250
[emailprotected]
