Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
Chloride and strength-driven jobs often move from 316L to duplex (S31803/S32205) or super duplex (S32750/S32760). We supply pipe and tube to A790 / A789 (and related) when the PO names them.
Related: SS hub · materials hub · duplex buttweld.
Send UNS grade, ASTM product spec, size, wall, quantity, PREN/NACE notes if required, and destination. Email sales@savoypipinginc.com.
Duplex family
| Choose | When | Watch-outs |
|---|---|---|
| S32205 | Most common duplex 2205 enquiries | Control ferrite / heat input |
| S32750 | Higher PREN / seawater-class duty | Stricter fabrication controls |
| 316L | Lower chloride / cost path | Lower strength & PREN |
Duplex / super duplex — UNS: ____ Spec: A790 / A789 / A928 Size: ____ Wall: ____ Qty: ____ PREN/NACE: ____ MTC: 3.1/3.2 Destination: ____
Email sales@savoypipinginc.com with destination and any IBR / NACE / TPI notes.
| Duplex Stainless Steel Pipe & Tubes Specification | ASTM A789, ASTM A790, ASTM A928, ASME SA789, ASME SA790, ASME SA928 |
| Duplex Stainless Steel Pipe & Tubes Grades | S31803 / S32205 (2205), S32750 / S32760 super duplex — A790 / A789 / A928 |
| Duplex Stainless Steel Pipe & Tubes Type | Seamless / Welded / ERW / EFW / Cold Draw / Hot Finish / Cold Finish |
| Duplex Stainless Steel Pipe & Tubes Outer Diameter Size | Seamless - 1/2" NB TO 18" NB Welded / ERW- 1" NB TO 16" NB EFW - 8" NB TO 110" NB |
| Duplex Stainless Steel Pipe & Tubes Wall Thickness | Schedule 10 to Schedule 160 (3 mm to 100 mm Thickness) |
| Duplex Stainless Steel Pipe & Tubes Length | 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size. |
| Duplex Stainless Steel Pipe & Tubes Ends | Plain Ends / Beveled Ends |
| Duplex Stainless Steel Pipe & Tubes Delivery Conditions | As Rolled, Formed, Stress Relieved, Annealed, Hardened, Tempered, Cold Draw, Bright Annealed |
| Duplex Stainless Steel Pipe & Tubes Coating | Electropolish, Mechanical Polish, Satin Finish, Passivated |
| Duplex Stainless Steel Pipe & Tubes Other Testing | Product Analysis, Transverse Tension Test, Flattening Test, Etching Test, Radiograph HIC Examination, Stabilizing Heat Treatment, Intergranular Corrosion Test, Weld Decay Test, Magnetic Particle Detection, Grain Size Test, NACE 0175, Dual Grade, PWHT (POST WELD HEAT TREATMENT), Flare Test, Bend Test, Hardness Test, Tensile Test etc |
| Duplex Stainless Steel Pipe & Tubes Dimension | All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM And ASME |
| Duplex Stainless Steel Pipe & Tubes Value Added Services | Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Heat Treatment |
| Duplex Stainless Steel Pipe & Tubes Packaging | Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
| Duplex Stainless Steel Pipe & Tubes Shipment & Transportation | By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 4 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes |
| Duplex Stainless Steel Pipe & Tubes Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
| Trade Name | UNS | Super Duplex Industry Specifications | Chemical Composition | Min.Tensile (KSI) |
Min.Yield (KSI) |
Elongation % |
| SAF 2205® 22Cr |
UNS S31803 | ASME SA-182 (F51), SA-240, SA-798, SA-79, SA-815 ASTM A182 (F51),A240, A276, A479, A789, A790, A815, A928, A988 SAE J405 |
C 0.30 max Cr 21.0-23.0 Mn 2.00 max Mo 2.50-3.50 N 0.08-0.20 Ni 4.50-6.50 P 0.030 max S 0.020 max Si1.00 max |
9 | 65 | 25 |
| SAF 2205® 22Cr |
UNS S32205 | ASM SA-182 (F60), SA-240, SA-798, SA-79, SA-815 ASTM A182 (F60), A240, A276, A479, A480, A798, A790, A815, A928, A988 SAE J405 |
C 0.30 max Cr 22.0-23.0 Mn 2.00 max Mo 3.00-3.50 N 0.14-0.20 Ni 4.50-6.50 P 0.030 max S 0.020 max> Si 1.00 max |
95 | 65 | 25 |
| SAF 2507® | UNS S32750 | ASTM A182 F53, A240, A276, A479, A789, A790, A815, A928, A988 SAE J405 |
C 0.030 max Cr 24.0-26.0 Cu 0.5 max Mn 1.20 max Mo 3.0-5.0 N 0.24-0.32 Ni 6.0-8.0 P 0.035 max S 0.020 max Si 0.8 max |
116 | 80 | 15 |
| ZERON® 100 | UNS S32760 | ASTM A182 F55, A240, A276, A314, A473, A479, A789, A790, A815, A928, A988 SAE J405 |
C 0.03 max Cr 24.0-26.0 Cu 0.5-1.0 Mn 1.0 max Mo 3.0-4.0 N 0.2-0.3 Ni 6.0-8.0 P 0.03 max S 0.01 max Si 1.0 max W 0.5-1.0 |
109 | 80 | 25 |
Duplex stainless steel are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, Duplex stainless steel exhibit very high resistance to stress corrosion cracking.
The super duplex grades are even more resistant to corrosion.
The high chromium content of Duplex stainless steel that p rotects against corrosion, causes embrittlement at temperatures over about 300°C.
At low temperatures duplex stainless steels have better ductility than the ferritic and martensitic grades. Duplex grades can readily be used down to at least -50°C.
Fabrication of all stainless steel should be done only with tools dedicanted to stainless steel materials. Tooling and work surfaces must be thoroughly cleaned before use. These precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricanted product.
Duplex stainless steel cannot be hardened by heat treatment. They can however be work hardened.
Solution treatment or annealing can be done by rapid cooling after heating to around 1100°C.
Although machinable, the high strengths of Duplex stainless steel makes machining difficult. As an example, machining of 2205 is around 20% slower than for 304.
Machining can be enhanced by using the following rules:
Duplex stainless steel have good weldability. All standard welding processes can be used. They are not quite as easily welded as the austenitic grades but low thermal expansion in duplex grades reduces distortion and residual stresses after welding. The recommended filler material for 2205 stainless steel is 2209.
The Duplex Stainless Steel Pipes and Tubes is used in the following Applications:-
A dual-phase (ferrite + austenite) stainless with higher strength and better chloride pitting resistance than common 304/316 austenitics.
S32205 is the modern tighter 2205 chemistry. Many projects specify S32205; do not substitute without approval.
When seawater / high-chloride PREN or strength exceeds 2205 — typically UNS S32750 or S32760 to A790/A789/A928.
Pipe: ASTM A790. Tube: A789. EFW pipe: A928. Confirm class/testing on the PO.
We supply this product for domestic and export projects with MTC (EN 10204 3.1 standard; 3.2 / TPI on request). Include destination, Incoterms and inspection needs on the RFQ.