YUHONG HOLDING GROUP CO., LTD
| Specification&Material | ASTM A815 UNS S32750 (1.4410 / Alloy 2507) |
| Product Name | Duplex Stainless SteeI Pipe Fitting |
| Type | Seamless |
| Delivery Time | Depends on quantity |
| Application | Offshore oil & gas platforms, Desalination plants, Marine engineering, Petrochemical and chemical processing |
| Payment Terms | L/C,T/T |
| Testing | UT, PT, MT, PMI |
| Size Range | DN15-DN1200 (1/2"-48") |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Connection Type | Butt weld |
| Supply Ability | Accdording to customer's request |
| Model Number | ASTM B111 C70600 |
| Brand Name | YUHONG |
| Place of Origin | China |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 |
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Product Specification
| Specification&Material | ASTM A815 UNS S32750 (1.4410 / Alloy 2507) | Product Name | Duplex Stainless SteeI Pipe Fitting |
| Type | Seamless | Delivery Time | Depends on quantity |
| Application | Offshore oil & gas platforms, Desalination plants, Marine engineering, Petrochemical and chemical processing | Payment Terms | L/C,T/T |
| Testing | UT, PT, MT, PMI | Size Range | DN15-DN1200 (1/2"-48") |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap | Connection Type | Butt weld |
| Supply Ability | Accdording to customer's request | Model Number | ASTM B111 C70600 |
| Brand Name | YUHONG | Place of Origin | China |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015 |
ASTM A815 UNS S32750 WP-S Elbow, Duplex Stainless SteeI Pipe Fitting B16.9
The ASTM A815 UNS S32750 WP-S Elbow is a pipe fitting manufactured from super duplex stainless steel (UNS S32750) in accordance with ASTM A815. The designation “WP-S” indicates a seamless butt-weld fitting, meaning the fitting body is seamless wrought. This elbow is used to change the direction of fluid flow in piping systems (typically 45° or 90° or 180° ) (available in both long radius LR and short radius SR designs). UNS S32750 is known for its excellent resistance to pitting, crevice corrosion, stress corrosion cracking, and high mechanical strength. It is the Unified Numbering System designation for Duplex Stainless Steel 2507, a super duplex stainless steel with very high strength and exceptional corrosion resistance. Making it ideal for severely corrosive environments such as offshore engineering, petrochemical, seawater desalination, and flue gas desulfurization.
1.Chemical & Mechanical & Physical Properties
| ASTM A815 S32750 WP-S Chemical Composition (%) |
||||||||
| C | Mn | Si | P | S | Cr | Ni | N | Cu |
| ≤0.030 | ≤1.20 | ≤0.8 |
≤0.035 |
≤0.020 | 24.0-26.0 | 6.0-8.0 | 0.24-0.32 | ≤0.5 |
Mechanical Properties
|
Yield Strength,
min, ksi [MPa]
|
Tensile Strength,
ksi [MPa]
|
Elongation in 2 in. [50 mm]
or 4D, min, %
|
Hardness, HBW max
|
| 80[550] | 116[800]-140[965] | 15.0 | 310 |
Physical Properties
|
Density
|
Melting range
|
Thermal conductivity
|
Coefficient of thermal expansion
|
Continuous operating temperature
|
|
~7.8 g/cm³
|
1300℃ - 1440℃
|
14 W/(m·K)
|
12.0×10⁻⁶/K (20-100℃)
|
-50℃ to 250℃
|
|
Grade
|
Temperature
|
Cooling
|
Tempering Temperature
|
| S32750 | 1920-2060℉ [1025-1125℃] |
Water quench or rapidly cooled by other means | Not required |
2. Key Advantage
The corrosion resistance of S32750 is its core advantage in replacing conventional duplex steel and high-nickel alloys, mainly reflected in the following aspects:
Pitting and Crevice Corrosion Resistance: With high Cr (25%), Mo (4%), and N (0.3%), the material achieves a PREN (Pitting Resistance Equivalent Number) of ≥40 (and up to 43), enabling long-term service in seawater. CPT ≥40℃ (20% NaCl solution), CCT ≥35℃.
Stress Corrosion Cracking (SCC) Resistance: The ferritic phase provides excellent SCC resistance in chloride-bearing environments, a property where austenitic stainless steels (e.g., 316L) are deficient.
Intergranular Corrosion Resistance: Extremely low C content (≤0.030%) reduces chromium carbide precipitation at grain boundaries.
General Corrosion Resistance: Highly resistant to organic acids (formic, acetic). Corrosion rate <0.05 mm/year in 10% formic acid and 50% acetic acid, versus >0.2 mm/year for 316L.
Erosion and Corrosion Fatigue Resistance: Excellent resistance to erosion corrosion and corrosion fatigue.
3. Key Applications
Offshore Engineering: Deepwater oil & gas extraction, subsea manifolds, FPSO; compliant with NACE MR0175/ISO 15156
Seawater Desalination: RO systems, MSF plants; exceptional chloride corrosion resistance (CPT ≥40℃)
Petrochemical: Refinery units, chemical reactors, heat exchangers
Power Generation & Environment: Flue gas desulfurization (FGD) systems, nuclear auxiliary piping
Pulp & Paper: Bleaching plant piping systems
Specialty Chemicals: PTA plants, fertilizer equipment
| Nominal Pipe Size (inches) |
Outside Diameter |
90° Elbows | 45° Elbows | |||
| (mm) | (inches) | Long Radius | Short Radius | Long Radius | ||
| Center to Face (inches) |
Center to Face (inches) |
Center to Face (inches) |
Radius (inches) |
|||
| 1/2 | 21.3 | 0.840 | 1 1/2 | – | 5/8 | |
| 3/4 | 26.7 | 1.050 | 1 1/8 | 7/16 | ||
| 1 | 33.4 | 1.315 | 1 1/2 | 1 | 7/8 | |
| 1 1/4 | 42.2 | 1.660 | 1 7/8 | 1 1/4 | 1 | |
| 1 1/2 | 48.3 | 1.900 | 2 1/4 | 1 1/2 | 1 1/8 | 3 |
| 2 | 60.3 | 2.375 | 3 | 2 | 1 3/8 | 4 |
| 2 1/2 | 73.0 | 2.875 | 3 3/4 | 2 1/2 | 1 3/4 | 5 |
| 3 | 88.9 | 3.500 | 4 1/2 | 3 | 2 | 6 |
| 3 1/2 | 101.6 | 4.000 | 5 1/4 | 3 1/2 | 2 1/4 | 7 |
| 4 | 114.3 | 4.500 | 6 | 4 | 2 1/2 | 8 |
| 5 | 141.3 | 5.563 | 7 1/2 | 5 | 3 1/8 | 10 |
| 6 | 168.3 | 6.625 | 9 | 6 | 3 3/4 | 12 |
| 8 | 219.1 | 8.625 | 12 | 8 | 5 | 12 |
| 10 | 273.1 | 10.750 | 15 | 10 | 6 1/4 | 15 |
| 12 | 323.9 | 12.750 | 18 | 12 | 7 1/2 | 18 |
Company Details
Business Type:
Manufacturer,Importer,Exporter,Trading Company,Seller,Other
Year Established:
1990
Total Annual:
50M-70M
Employee Number:
50~800
Ecer Certification：
Verified Supplier
Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n... Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n...
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