MachineU > China Products > Minerals & Metallurgy > Stainless Steel > Stainless Steel Pipes
Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe
Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe
Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe
Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe
Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe
Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe
Specifications
Brand Name :
YUHONG, YUCHENG
Model Number :
ASTM A790 UNS S32750 Duplex Steel Seamless Pipe
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
1PC
Payment Terms :
L/C,T/T
Delivery Time :
7 DAYS
Packaging Details :
Plywood Case /Iron Case/ Woven Bag
Standard :
ASTM A790, ASME SA790
Material :
UNS S32750, 2507, 1.4410 ,022Cr25Ni7Mo4N
OD :
1/4" to 48"
WT :
Sch 10S to Sch XXS
Length :
SRL , DRL, Cut Length
End :
Plain End, Bevelled End
Type :
Seamless
High Light :
ASTM A790 UNS S32750 Super Duplex Steel Pipe, 2507 Duplex Seamless Pipe
Description

ASTM A790 / ASME SA790 UNS S32750 Seamless Super Duplex Stainless Steel Pipe

S32750 is a super duplex stainless steel with a nearly 50-50 austenitic-ferritic microstructure. This balance is critical for achieving its high strength and corrosion resistance. The phase balance is carefully controlled during manufacturing. If the balance is skewed (e.g., too much ferrite), it can lead to reduced toughness and corrosion resistance. Heat treatment (solution annealing) is used to optimize the microstructure, typically at temperatures around 1020–1100°C (1868–2012°F), followed by rapid quenching.

S32750 is particularly resistant to chloride stress corrosion cracking (CSCC), a common issue in austenitic stainless steels like 304 or 316 in chloride-rich environments (e.g., seawater or brine solutions).

This makes it ideal for offshore oil and gas applications, where exposure to seawater and high pressures is common.

ASTM A790 / ASME SA790 S32750 Super Duplex Stainless Steel Pipe Specification

Standard ASTM A790, ASME SA790
Equivalent Standards DIN 17458, GOST 9941-81, GOST 9940-81, EN 10216-5, ASTM A790, ASME SA790, DIN 17456
Material S32750
Equivalent Materials X2CrNiMoN25-7-4, 1.4410, 2507, F53
Related Products stainless steel tube, stainless steel pipe, heat exchanger steel tube

ASTM A790 / ASME SA790 S32750 Super Duplex Stainless Steel Pipe Chemical Composition

Grade

C

max

Si

max

Mn

max

P

max

S

max

 Cr Ni Mo N
UNS S32750 0.030 0.8 1.2 0.030 0.015 24.0-26.0 6.0-8.0 3.0-5.0 0.24-0.32
UNS S31803 0.030 1.0 2.0 0.020 0.020 21.0-23.0 4.5-6.5 2.5-3.5 0.08-0.20
UNS S31500 0.030 1.0 1.2-2.0 0.030 0.030 18.0-19.0 4.5-5.5 2.5-3.5 0.05-0.10


ASTM A790 / ASME SA790 Duplex Stainless Steel Pipe Physical Properties

Grade Y.S.MPa min T.S.Mpa min Elongation % Hardness HRC
UNS S32750 550 800 15 20
UNS S31803 450 620 25 20
UNS S31500 440 630 30 20

Other characteristic of Super Duplex Steel UNS S32750

Impact of Nitrogen Content

The nitrogen content (0.24–0.32%) in S32750 plays a crucial role:

Enhances strength and corrosion resistance.

Stabilizes the austenitic phase, improving weldability and toughness.

Nitrogen also helps prevent the formation of harmful intermetallic phases (e.g., sigma phase) during welding or prolonged exposure to high temperatures.
Welding Considerations

While S32750 is weldable, it requires careful control of heat input and interpass temperatures to avoid:

Formation of sigma phase or chromium carbides, which can degrade corrosion resistance and toughness.

Excessive ferrite content in the weld zone.

Recommended filler metals: ER2594 or ER2553 for matching properties.

Post-weld heat treatment is generally not required but may be used in specific cases to restore corrosion resistance.
Thermal Stability

S32750 has good thermal stability up to 300°C (572°F). Beyond this temperature, prolonged exposure can lead to:

Embrittlement due to the formation of intermetallic phases.

Reduced corrosion resistance.

This limits its use in high-temperature applications compared to nickel-based alloys.
Cost-Effectiveness

Despite being a premium material, S32750 is often more cost-effective than high-nickel alloys like Inconel or Hastelloy for applications requiring high strength and corrosion resistance.

Its lower nickel content (6–8%) compared to austenitic stainless steels (e.g., 316L with 10–14% Ni) makes it more economical.

Application

  • Oil and gas industry for offshore platforms, subsea pipelines, and topside processing facilities.
  • Chemical and petrochemical industry for processing equipment, storage tanks, and piping systems.
  • Marine industry for shipbuilding, desalination plants, and offshore structures.
  • Power generation industry for heat exchangers, pressure vessels, and boiler tubes.
  • Water treatment industry for desalination plants, water pipelines, and wastewater treatment facilities.

Send your message to this supplier
Send Now

Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe

Ask Latest Price
Product Detail
Brand Name :
YUHONG, YUCHENG
Model Number :
ASTM A790 UNS S32750 Duplex Steel Seamless Pipe
Certification :
ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Place of Origin :
CHINA
MOQ :
1PC
Payment Terms :
L/C,T/T
Contact Supplier
Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe
Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe
Super Duplex 2507 Pipe ASTM A790 UNS S32750 Super Duplex Stainless Steel Pipe

Yuhong Group Co.,Ltd

Verified Supplier
13 Years
zhejiang, ningbo
Since 2007
Business Type :
Manufacturer, Distributor/Wholesaler, Importer, Exporter, Trading Company, Seller, Other
Main Products :
Stainless Steel Seamless Pipe, Stainless Steel Seamless Tube, Duplex Stainless Steel Pipe
Total Annual :
50M-70M
Employee Number :
50~850
Certification Level :
Verified Supplier
Discover similar products
View More

Find Similar Products By Category:

Supplier Homepage Products Duplex Stainless Steel Pipe
MachineU China Products Minerals & Metallurgy Stainless Steel Stainless Steel Pipes
Contact Supplier
Submit Requirement