ASTM A815 UNS S32750
ASTM A815 UNS S32750 Super Duplex 2507 Pipe Fittings
ASTM A815 UNS S32750 refers to pipe fittings made from Super Duplex Stainless Steel grade 2507, known for its high strength and superior corrosion resistance. This alloy combines the qualities of austenitic and ferritic stainless steels, making it ideal for aggressive environments like offshore oil and gas, chemical processing, and marine applications.
Key Features:
Highly resistant to pitting, crevice corrosion, and chloride stress corrosion cracking.
High mechanical strength and durability
Good weldability and workability
Low thermal expansion and high thermal conductivity
Standards:
ASTM A815 – Specification for Wrought Ferritic, Ferritic/Austenitic Stainless Steel Fittings
ASME B16.9 / B16.11 / B16.28
MSS-SP-43
Available Types
ASTM A815 UNS S32750 Chemical Composition
Element | Composition |
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Manganese (Mn) | ≤ 1.20 |
| Silicon (Si) | ≤ 0.80 |
| Carbon (C) | ≤ 0.030 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.020 |
| Iron (Fe) | Balance |
ASTM A815 UNS S32750 Mechanical Properties
| Property | Value |
| Tensile Strength | ≥ 800 MPa (116000 psi) |
| Yield Strength (0.2% Offset) | ≥ 550 MPa (79800 psi) |
| Elongation | ≥ 15% |
| Hardness (HRB) | ≤ 100 |
Applications
Offshore platforms
Heat exchangers and pressure vessels
Pulp & paper industry
Desalination plants
Chemical and petrochemical industries