Are you searching for high-performance stainless steel pipes for demanding industrial applications? When it comes to critical projects that require superior corrosion resistance, high strength, and durability, ASTM A790 UNS32750 and UNS32760 stainless steel pipes are the ideal choice. These duplex stainless steel grades are specially designed for severe environments, offering excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, making them perfect for oil & gas, chemical, marine, and power generation industries.
What Are ASTM A790 UNS32750 & UNS32760 Pickled and Annealed Stainless Steel Pipes?
ASTM A790 is a specification that covers seamless and welded duplex stainless steel pipes. UNS32750 and UNS32760 are two of the most commonly used duplex stainless steel grades for applications requiring enhanced corrosion resistance and strength, particularly in seawater, chemical processing, and power generation industries.
Both grades are pickled and annealed to enhance the surface quality, corrosion resistance, and structural integrity of the pipes.
What is the difference between UNS32750 and UNS32760 stainless steel?
UNS32750 (Duplex 2507) offers high strength and resistance to corrosion, suitable for most aggressive environments. UNS32760 (Super Duplex 32760) provides even higher corrosion resistance and strength, ideal for the most demanding applications.
ASTM A790 UNS32750 & UNS32760 Chemical Composition
| Element | UNS32750 (Duplex 2507) | UNS32760 (Super Duplex) | Notes |
|---|---|---|---|
| Chromium (Cr) | 24–26% | 25–27% | Higher Cr for superior corrosion resistance |
| Nickel (Ni) | 6–8% | 6–8% | Nickel content helps improve toughness |
| Molybdenum (Mo) | 3–5% | 3–4% | Mo enhances pitting resistance |
| Manganese (Mn) | 0.5–2% | 1.0–1.5% | Manganese supports toughness and corrosion resistance |
| Nitrogen (N) | 0.2–0.3% | 0.2–0.3% | Nitrogen increases strength and resistance to cracking |
Mechanical Properties
| Property | UNS32750 (Duplex 2507) | UNS32760 (Super Duplex) | Unit |
|---|---|---|---|
| Tensile Strength | 620–850 MPa | 700–950 MPa | MPa |
| Yield Strength | 450–550 MPa | 500–600 MPa | MPa |
| Elongation | 25% | 20% | % |
| Hardness | 290–330 HB | 300–340 HB | HB |
Cost Considerations and Availability
| Pipe Grade | Price Range (USD) | Availability | Notes |
|---|---|---|---|
| UNS32750 (Duplex 2507) | $8.00–$10.00 / lb | Widely available | Ideal for high-corrosion applications |
| UNS32760 (Super Duplex) | $10.50–$13.00 / lb | Limited availability | Premium grade for extreme environments |
Pro tip: The price of UNS32760 is higher due to its superior performance in aggressive environments, but it is a valuable investment for long-term reliability in critical applications.
Are UNS32750 and UNS32760 pipes resistant to chloride stress corrosion cracking?
Yes, both grades are specifically designed to provide superior resistance to chloride stress corrosion cracking, making them perfect for marine and offshore oil & gas applications.
ASTM A790 UNS32750 and UNS32760 pickled and annealed stainless steel pipes are top choices for industries demanding the highest performance in corrosive environments. Whether you're involved in offshore oil rigs, chemical processing, or marine applications, these duplex stainless steel pipes offer superior corrosion resistance, high tensile strength, and long-term durability.
For more information or to place an order, contact our sales team to discuss your requirements. With competitive pricing, international shipping, and custom specifications, we are your trusted partner for stainless steel piping solutions. Mail:es@gescosteel.com
