Yuhong Group Co.,Ltd
| NDT | Eddy current test, Hydrostatic test |
| Delivery Time | Depends on quantity |
| Supply Ability | 100 tons per month |
| Product Type | Seamless cold drawn stainless steel heat exchanger & condenser tube |
| Application | Heat exchangers, condensers, evaporators, Seawater cooling & desalination plants |
| Heat Treatment | Solution annealing |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Payment Terms | T/T, L/C at sight |
| Common Name | A789 S32750 Super Duplex Tube |
| Standard | ASTM A789 / ASME SA789 |
| Grade | UNS S32750 |
| Delivery Condition | Annealed, pickled & passivated, bright annealed optional |
| Certification | ISO, TUV, PED etc. |
| Brand Name | YUHONG |
| Place of Origin | China |
| Model Number | A789 S32750 (EN 1.4410, SAF 2507) |
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Product Specification
| NDT | Eddy current test, Hydrostatic test | Delivery Time | Depends on quantity |
| Supply Ability | 100 tons per month | Product Type | Seamless cold drawn stainless steel heat exchanger & condenser tube |
| Application | Heat exchangers, condensers, evaporators, Seawater cooling & desalination plants | Heat Treatment | Solution annealing |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap | Payment Terms | T/T, L/C at sight |
| Common Name | A789 S32750 Super Duplex Tube | Standard | ASTM A789 / ASME SA789 |
| Grade | UNS S32750 | Delivery Condition | Annealed, pickled & passivated, bright annealed optional |
| Certification | ISO, TUV, PED etc. | Brand Name | YUHONG |
| Place of Origin | China | Model Number | A789 S32750 (EN 1.4410, SAF 2507) |
| High Light | Super Duplex heat exchanger tube ，Seamless duplex stainless steel tube ，Solution annealed S32750 tube | ||
A789 S32750 Super Duplex Heat Exchanger Tube, Seamless And Solution Annealed, Eddy Current Test / Hydrostatic Tested
Overview
ASTM A789 S32750 (2507/1.4410) is a premium super duplex stainless steel seamless tube engineered specifically for heat exchangers, condensers and evaporators.
With a balanced 50% austenite and 50% ferrite microstructure, it features high mechanical strength, excellent chloride pitting, crevice and stress corrosion resistance, and superior thermal conductivity.
It is widely used in seawater desalination, offshore oil & gas, petrochemical, power plant and FGD systems for high-pressure, high-temperature and harsh corrosive working conditions.
Key Performance Features
Double yield strength compared to 304/316L
Outstanding resistance to chloride pitting, crevice corrosion & stress corrosion cracking
Good thermal conductivity, higher than austenitic stainless steel
Excellent erosion corrosion & fatigue resistance
Suitable for high pressure & high temperature severe service
Mechanical Properties (Solution Annealed Condition)
Tensile Strength: ≥790 MPa
Yield Strength (0.2% Proof): ≥550 MPa
Elongation: ≥15%
Hardness: ≤310 HB / ≤32 HRC
Microstructure: Balanced 50% Ferrite + 50% Austenite
Manufacturing & Heat Treatment
Process: Seamless → Hot piercing → Cold drawn / Cold rolled
Heat Treatment: Solution annealing at 1020–1100°C, water quenched
Delivery Condition: Annealed, pickled & passivated, bright annealed optional
Available Size Range
Outer Diameter: 6.0mm – 114.3mm
Wall Thickness: 1.0mm – 8.0mm
Standard Length: 6000mm / 12000mm
Custom: U-bend heat exchanger tubes available
Tolerance: Strict OD & WT tolerance per ASTM A789
Chemical Composition for A789 S32750 Super Duplex Heat Exchanger Tube
| Element | Content Limit |
|---|---|
| C | ≤0.03 |
| Mn | ≤1.20 |
| P | ≤0.035 |
| S | ≤0.020 |
| Si | ≤0.80 |
| Cr | 24.00–26.00 |
| Ni | 6.00–8.00 |
| Mo | 3.00–5.00 |
| N | 0.24–0.32 |
Key Performance Features
Application
Heat exchangers, condensers, evaporators
Seawater cooling & desalination plants
Offshore oil & gas platforms
Petrochemical, chemical processing industry
Power plant coastal cooling systems
Flue gas desulfurization (FGD) systems
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
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