ASTM A789 S32750 is a specification for super duplex seamless and welded pipe designed to achieve high strength and enhanced resistance to seawater corrosion, particularly in environments with equalizing chlorides. With nearly 18 years of extensive experience in seamless stainless steel pipe production, GNEE ensures each pipe undergoes rigorous testing for dimensions, surface quality, PMI (Positive Material Identification), eddy current inspection, and hydrostatic testing. We only package high-quality pipes for delivery to global customers.
The ASME SA789 super duplex UNS S32750 pipes supplied by GNEE are typically manufactured using the cold-drawing process and can be further strengthened through cold working. The UNS S32750 steel grade (also known as SAF 2507 or Duplex 2507) features a dual-phase microstructure, delivering exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking.
The ASME SA789 S32750 bright annealed pipes are suitable for applications up to 600°F (316°C), offering a minimum yield strength of 57 ksi (≈570 MPa). They ensure dimensional accuracy, surface finish, and long-term performance under extreme chemical and thermal stresses, making them ideal for high-demand applications in offshore oil and gas, petrochemical processing, and marine engineering.
ASTM A789 S32750 Super Duplex Steel pipe specifications
| Thickness | 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Outer Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Form | Round Tubes, Square Tubes, Rectangular Tubes, Coiled Tubes, "U" Shape, Pan Cake Coils, Hydraulic Tubes |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Treaded. |
S32750 Super Duplex Steel Seamless Tube Chemical Composition
|
Grade |
C |
Mn |
P |
S |
Si |
Ni |
Cr |
Mo |
N |
Cu |
|
S32750 |
≤0.03 |
≤1.2 |
≤0.035 |
≤0.002 |
≤0.8 |
6-8 |
24-26 |
3-5 |
0.24-0.32 |
≤0.5 |
S32750 Duplex Steel Seamless Tube Mechanical Properties
|
Grade |
Tensile Strength ksi(MPa) |
Yield Strength ksi (MPa) |
Elongation (%) |
Hardness HBW |
Hardness HRC |
|
S32750 |
≥116(800) |
≥80(550) |
≥15 |
≤300 |
≤32 |
GNEE has nearly 18 years of experience in seamless stainless steel pipe production. Every pipe undergoes dimensional, surface, PMI, eddy current, and hydrostatic tests. Only high-quality pipe is packaged and delivered to customers worldwide. Our pipe offerings cover both imperial and metric sizes, with outer diameters ranging from 1.58 mm to 108 mm. Special sizes are also available. FILET pipes are available in straight or U-bend lengths up to 30 meters. Mail:es@gescosteel.com
Grades: 304/304L, 304H, 316/316L, 316H, 317L, 321, 310S (2520), 347H, S31803/S32205, S32750, S32760, S32304, 904L
Specifications: ASTM A213, A270, A789, A790, GB/T13296, DIN17458, EN10216-5
Outer Diameter Range: 1.58mm – 108mm
Thickness: 0.38mm – 5.18mm
Length: Maximum 25mm (U-bend compatible)
Surface Treatment: A&P, BA, EP
