ASTM A789 S32001 Duplex Stainless Steel Pipe Material
ASTM A789 S32001 Duplex Stainless Steel Pipe & Material
Technical data for ASTM A789 S32001 duplex stainless steel pipe with chemistry, mechanical & physical properties, international equivalents, and application guide.
Hot rolling, cold drawing, welding, solution annealing (typically 1020–1100°C, water quench)
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ASTM A789 S32001 Duplex Stainless Steel Pipe Material Introduction
S32001 (UNS S32001) is a lean duplex stainless steel specified in ASTM A789/A789M for seamless and welded pipe. It offers a balanced microstructure of ferrite and austenite, providing high strength, good weldability, and excellent resistance to chloride stress corrosion cracking. The composition contains reduced nickel and molybdenum compared to standard duplex grades, making it a cost-effective choice for many corrosive environments. Typical delivery is solution annealed, achieving a minimum tensile strength of 690 MPa with good ductility.
ASTM A789 S32001 Duplex Stainless Steel Pipe Material Chemical Composition
Chemical composition according to ASTM A789/A789M for grade S32001. Values represent the heat analysis limits; product analysis may have slight variations. Iron (Fe) constitutes the balance.
| Element | Content (%) | Remarks |
|---|---|---|
| C | ≤0.030 | |
| Mn | 4.0–6.0 | |
| P | ≤0.040 | |
| S | ≤0.010 | |
| Si | ≤1.00 | |
| Cr | 19.5–21.5 | |
| Ni | 1.00–3.00 | |
| Mo | ≤0.60 | |
| N | 0.05–0.17 | |
| Cu | ≤1.00 | |
| Fe | Balance (approx. 67–74) |
ASTM A789 S32001 Duplex Stainless Steel Pipe Material Thermal & Electrical Physical Properties
Representative physical properties for UNS S32001 duplex stainless steel at room temperature and up to 100°C where indicated. These values are for general guidance and may vary with processing and exact composition.
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density (ρ) | 7.8 | g/cm³ | Room temperature |
| Elastic Modulus (E) | 200 (29.0×10³) | GPa (ksi) | Room temperature |
| Shear Modulus (G) | 77 (11.2×10³) | GPa (ksi) | Room temperature, calculated from E and ν |
| Poisson's Ratio (ν) | 0.30 | – | Room temperature |
| Coefficient of Thermal Expansion (α) (20–100°C) | 13.5 | ×10−⁼/K | 20–100°C |
| Thermal Conductivity (λ) | 14 | W/(m·K) | At 20°C |
| Specific Heat Capacity (c) | 500 | J/(kg·K) | At 20°C |
| Electrical Resistivity (ρ) | 0.80 | μΩ·m | At 20°C |
ASTM A789 S32001 Duplex Stainless Steel Pipe Material Mechanical Properties
Minimum tensile properties as per ASTM A789 for S32001 pipe in the solution-annealed condition. Testing is performed at room temperature in the longitudinal direction.
| Property | Specified Value | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength (Rm) | ≥690 (100) | MPa (ksi) | Room temperature, longitudinal |
| Yield Strength (Rp0.2) | ≥450 (65) | MPa (ksi) | Room temperature, longitudinal |
| Elongation (A) | ≥25 | % | In 2 in. (50 mm) gauge length |
ASTM A789 S32001 Duplex Stainless Steel Pipe Material Full Equivalent Material Standards & Substitute Grades
| Country/Region | Standard | Grade/Designation | Remarks |
|---|---|---|---|
| Europe | EN 10088-3 | 1.4482 (X2CrMnNiMoN21-5-3) | Identical chemical composition and mechanical properties |
| International | ISO 4954 | X2CrMnNiMoN21-5-3 | Corresponds to UNS S32001 |
| USA | UNS | S32001 | Universal numbering system designation |
| Various | Project specifications | S32001 / 1.4482 | Direct equivalents in international projects |
ASTM A789 S32001 Duplex Stainless Steel Pipe Material Application Introduction
S32001 pipe is suited for applications demanding high strength, good weldability, and resistance to chloride stress corrosion cracking. Its lean composition offers cost advantages over standard duplex grades while maintaining adequate corrosion performance in many environments.
Product Applications: Seamless and welded pipes, Heat exchanger tubes, Process piping systems, Structural hollow sections, Water and wastewater transport lines
Processed into products: Pipe spools and fittings, Flanges and connectors, Pressure vessel components, Columns and beams, Brackets and supports
Application industries: Chemical processing, Oil and gas (offshore/onshore), Desalination plants, Marine engineering, Pulp and paper industry, Structural and civil engineering
ASTM A789 S32001 Duplex Stainless Steel Pipe Material Similar / Alternative Materials & Recommendations
| Country/Region | Standard | Grade/Designation | Remarks |
|---|---|---|---|
| USA | ASTM A789 | S32101 (UNS S32101) | Lean duplex with lower Ni and Mn; slightly lower strength but similar corrosion resistance |
| Europe | EN 10088-3 | 1.4162 (X2CrMnNiN21-5-1, LDX 2101®) | Commonly used substitute; lower Mo and N, may have lower pitting resistance |
| USA/Europe | ASTM A240 / EN 10088 | S32304 (1.4362, 2304) | Higher Ni and Mo content, offering improved corrosion resistance but higher cost |
Notes:
All data is based on the published ASTM A789/A789M specification and typical material data sheets. Values are minimum or typical reference and should not be substituted for product-specific certification. Always refer to the relevant material test report (MTR) for final acceptance.
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