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| Brand Name: | YUHONG |
| Model Number: | ASTM A789 UNS 32750 Super Duplex Stainless Steel Seamless Tube |
| MOQ: | 1000kgs |
| Payment Terms: | L/C,T/T |
ASTM A789 UNS S32750 / Super Duplex 2507 Stainless Steel Seamless Tube Heat Exchanger Tube
Why S32750 is Chosen for Heat Exchangers:
Outstanding Corrosion Resistance: Especially against chloride pitting, crevice corrosion, and stress corrosion cracking. It far exceeds standard 316/316L and even duplex 2205. This is critical in seawater-cooled condensers, offshore platforms, and chemical processing.
High Strength: Yield strength is about double that of standard austenitic steels (e.g., 304/316). This allows for thinner tube walls, which improves heat transfer efficiency and reduces weight and material cost.
Good Erosion/Corrosion Resistance: Suitable for fluids with suspended solids or high flow rates
ASTM A789 UNS S32750 Super Duplex Stainless Steel Seamless Tube Equivalent Grade
|
Duplex |
UNS Designation |
Werkstoff NR. |
Specifications |
AFNOR |
Grade |
1.4410 |
|---|---|---|---|---|---|---|
|
2507 |
S32750 |
1.4410 |
A/SA789, A/SA790 |
Z3 CN 25.06 Az |
F53 |
X2 Cr Ni MoN 25.7.4 |
ASTM A789 UNS S32750 Super Duplex Stainless Steel Seamless Tube Chemical Composition
| C% | Si% | Mn% | P% | S% | Cr% | Ni% | Mo% | N% | Cu% |
| 0.03 max | 0.8 max | 1.2 max | 0.035 max | 0.02 max | 24-26 | 6-8 | 3-5 | 0.24-0.32 | 0.5 max |
ASTM A789 UNS S32750 Super Duplex Stainless Steel Seamless Tube Mechanical Properties
| Tensile Strength, Mpa | Yield Strength, MPa | Elongation, % | Hardness, HB |
| 795 min | 550 min | 15 min | 310 max |
Comparison Rationale: Why Choose S32750 over 316L or 2205?
vs. 316L Austenitic: When 316L is failing due to chloride stress corrosion cracking or pitting, and higher strength is needed.
vs. 2205 Duplex (S32205/S31803): When the chloride concentration, temperature, or required safety factor exceeds the limits of 2205, or when higher mechanical strength offers a design advantage.
Application
This tube is specified for critical, capital-intensive heat transfer equipment where reliability is paramount:
Shell & Tube Heat Exchangers & Condensers in offshore oil & gas platforms and refineries.
Seawater Cooling Systems (the premier material for this application).
Desalination Plant (MED, MSF) tubing.
Chemical & Petrochemical Processing with aggressive acids and chlorides.
Pollution Control & FGD (Flue Gas Desulfurization) systems.
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Tel
+86-574-88013900
