Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.

sales@savoypipinginc.com
Savoy Piping Inc logo

ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes

A Super Duplex Alloy Stainless Steel Designed to Feature High Strength, Resistance to Pitting, Stress Corrosion Cracking, Erosion Corrosion and Corrosion Fatigue, Crevice Corrosion, and Strong Weldability

ASTM A790 S32750 Super Duplex Welded Pipe

ASME SA790 · UNS S32750 · 25Cr super duplex (~2507)


Duplex Stainless Steel Pipes

Savoy Piping Inc. supplies ASTM A790 S32750 welded pipe — 25% Cr super duplex for severe chloride / seawater duty with high mechanical strength.

A790 Seamless · A790 Welded · A789 Tube · A928 EFW · Duplex hub

Also see: Duplex & super duplex hub · Duplex buttweld · Duplex flanges.

What is A790 S32750?

UNS S32750 welded pipe for chloride and high-strength duty. typical min yield ~550 MPa (80 ksi), tensile ~800 MPa (116 ksi) — confirm A790/A789.

Typical applications

  • Seawater injection and firewater systems
  • Offshore umbilicals / process piping
  • Desalination and aggressive brine
  • High-pressure chloride process lines

Selection guidance

Use when 2205 PREN/strength is insufficient. Control heat input, ferrite balance and intermetallic precipitation risk — WPS critical.

2507 vs 2205: higher PREN and strength. 2507 vs S32760: both super duplex; S32760 often chosen for specific sour/chloride packages.

ASTM A790 UNS 32750 Super Duplex Stainless Steel Welded Pipes

ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Specification ASTM A789, ASTM A790, ASTM A928, ASME SA789, ASME SA790, ASME SA928
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Grades UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF® 2205, SAF® 2507, FERRINOX® 225, AMINOX® 225, ZERON® 100
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Type Seamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold Finish
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Outer Diameter Size Seamless - 1/2" NB TO 18" NB
Welded / ERW- 1" NB TO 16" NB
EFW - 8" NB TO 110" NB
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Wall Thickness Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness)
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Length 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size.
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Ends Plain Ends / Beveled Ends
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Delivery Conditions As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw, Bright Annealed
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Coating Electropolish, Mechanical Polish, Satin Finish, Passivated
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Other Testing Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiograph HIC Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Dimension All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM And ASME
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Value Added Services Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Packaging Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Shipment & Transportation By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 4 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes
ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes Material Test Certificate Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC

Chemical Composition of ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes

Elements C Cr Cu Fe Mo Mn N Ni P S Si W
Minimum 24.0 REMAINDER 3.00 0.24 6.00 0.20 0.50
Maximum 0.030 26 0.50 5.00 1.20 0.32 8.00 0.035 0.020 0.80 1.00

Mechanical Properties of ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes

0.2% Proof Stress (N/mm2 ) [ksi] minimum 550[79.8]
Ultimate Tensile Strength (N/mm2) [ksi] minimum 800 [116]
Elongation (%) minimum 15
ardness (HBN) 310 max
Reduction of Cross Section Area (%) 4
Charpy V-notch Impact at ambient Temp (J) [ft.lb] 80min [59min]
Charpy V-notch Impact at -46°C (J) [ft.lb] 4av, 35min [33av, 25.8min]
Additional Testing
ASTM G48A Corrosion test at 40°C No pitting and weight loss 4.0g/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 OF ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes

Density (Kg.m-1) 7810
Magnetic Permeability 33
Young’s Modulus (N/mm2) 199 x 103
Specific Heat, 20°C (J.Kg-1.°K-1) 475
Fracture Toughness, Kq (MPa.m) 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

Alloy Comparison Super Duplex Stainless Steel

Alloy Comparisons S31803 S17400
(17-4PH)		 718
( ST)		 S31254 Alloy 32750
0.2% Proof Strength (N/mm2), minimum 40 1070 550 300 550
Corrosion Rate (mm.y-1) Seawater <0.01< /td> ~1 <0.01< /td> <0.01< /td> <0.01< /td>
Corrosion Rate (mm.y-1)
10% sulphuric acid at 80°C		 <0.4< /td> 10 >1 1.5 <0.15< /td>
Corrosion Rate (mm.y-1)
Boiling 50% nitric acid		 <0.15< /td> <0.15< /td> <0.15< /td> 0.4 <0.15< /td>
Wear Properties related to Hardness (HBN) RC25 RC38 RC20 RC20 RC28

Main Features of UNS S32750 Super Duplex Stainless Steel

  • UNS S32750 has excellent corrosion resistance in a wide variety of corrosive chemicals
  • Outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with 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
  • UNS S32750 is listed in NACE MR 01 75 for sour service
  • ASME Approval for Pressure Vessel Application

Application of ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes

  • Chemical Process Industry: Due to its high corrosion resistance UNS S32750 is ideal for use in Nitric Acid Processes, Polypropylene Production, PVC Production, Dioxide, Caustic Evaporators, and Equipment.
  • Handling Organic and Fatty Acids.
  • Marine Industry and Shipbuilding: Propellers and Shafts, Rudders, Shaft Seals, Pumps, Bolts and Fasteners, Valves, Instrumentation, Oil and Chemical Tankers
  • Oil and Gas Industry: Pumps, Valves, Pipe, Vessels, Wellhead Equipment, Subsea Equipment
  • Pollution Control: Fans and pumps, Wet Scrubbers, Incinerators
  • Pulp and Paper Industry: Black liquor heater tubes, Digester Blow Valves, Rotary Feed Valves, I.D.Fans, Brownstock Washers, Precipitators, Bleaching Components
  • Food Industry: Sugar Cane Centrifuges, Corn and Vegetable processing plant
  • Agrochemicals: Fertilizer Production (Wet phosphoric acid)
  • Civil Engineering: Sewage Treatment

Frequently asked questions — ASTM A790 S32750 Welded Pipe

What is ASTM A790 S32750?

A790 covers seamless and welded ferritic/austenitic stainless pipe. S32750 is 25% Cr super duplex for severe chloride / seawater duty with high mechanical strength.

A790 vs A789?

A790 is pipe; A789 is tube. Keep the product noun matching the datasheet.

Typical strength?

typical min yield ~550 MPa (80 ksi), tensile ~800 MPa (116 ksi) — confirm A790/A789

Fabrication note?

Control heat input and interpass temperature to maintain phase balance and avoid sigma/chi phases.

Supplying ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes to Countries -

We export ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes to Saudi Arabia, Iran, Iraq, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen, Syria, Israel, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Myanmar, Taiwan, Cambodia, Argentina, Bolivia, Brazil, Chile, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States of America, Canada, Mexico, Panama, Costa Rica, Puerto Rico, Trinidad And Tobago, Jamaica, Bahamas, Denmark, Russia, Norway, Germany, France, Italy, United Kingdom, Spain, Ukraine, Netherlands, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Switzerland, Slovakia, Finland, Ireland, Croatia, Slovenia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Equatorial Guinea, The Republic Of Congo, Gabon, Europe, Africa, Asia, North America, South America, Middle East, Far East.etc

Savoy Piping Inc. is a well known worldwide Exporter of ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes, Savoy Piping Inc. is committed to provide each and every customer with the highest standard of customer service. We deal in ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipe in India and Overseas, offering a wide range of ASTM A790 UNS S32750 Super Duplex Stainless Steel Welded Pipes.