Manufactures & Suppliers of Pipes, Tubes, Flanges, Pipe Fitting & Fasteners
Duplex Steel Pipes and Tubes
Duplex Steel Pipes derive their name from the dual-phase microstructure present in the alloy. Duplex Stainless Steel Seamless Pipes possess excellent mechanical properties and can be used in their as-welded condition. Considered superior to traditional austenitic alloys like ASTM A312 TP304 or ASTM A312 TP316, the Seamless Duplex Pipes offer significantly better corrosion resistance. This is especially evident when the Duplex Stainless Steel Pipes are exposed to corrosive environments containing compounds that can cause chloride stress corrosion and chloride pitting corrosion.
Duplex Seamless Pipe and Tube, Duplex Stainless Steel Seamless Pipe, Duplex Welded Pipe, Duplex Pipe Price List, ASTM A789 Steel Pipe, ASTM A790 DSS Pipe
The Duplex Welded Pipes also showcase higher tensile strength compared to standard austenitic stainless steel grades, making them ideal for use in offshore oil and gas industries. Due to the lower nickel content in Duplex alloys, the material is also more economical, providing both performance and cost-effectiveness. As one of the leading A790 Duplex Pipe manufacturers, Natron Steel is proud to offer high-quality Duplex Steel Pipes to our customers.
At Natron Steel, we have been producing Duplex Stainless Steel Seamless, Welded, and ERW Pipes for several years. Our manufacturing range covers pipes from 4mm to 219mm in Seamless and 5mm to 1219.2mm in Welded formats. Additionally, we offer the flexibility of custom sizes for orders above 10 tons. By choosing Natron Steel as your Duplex Stainless Steel Pipe manufacturer, you benefit from 10% lower pricing compared to stockists and suppliers, along with prime quality material backed by Mill Test Certificates. All our Duplex Steel Pipes and Tubes come with warranties for guaranteed performance.
Duplex Seamless Pipe and Tube Specifications
| Specification | ASTM A 790 ASME SA 790 |
| Dimensions | ASTM, ASME and API |
| Size | 1/2″ TO 6′ IN OD & NB IN Various SWG & SCH |
| Specialized in | Large Diameter Size |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80 |
| Type | Seamless / Welded / ERW / Fabricated |
| Form | Round, Hydraulic, Etc. |
| Length | Single Random, Double Random & Cut Length. |
| End | Plain End, Beveled End, Threaded |
| Test |
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Natron Steel maintains strong relationships with traders, stockholders, and distributors across India, ensuring that we meet the demands of various industries. For orders exceeding 2 tons, you can contact Natron Steel directly, saving up to 10-15% on pricing while receiving authentic, high-quality Duplex Pipes. Don’t forget to check our Duplex Seamless Pipe Price List, weight charts, sizes, and dimensions to ensure you get the best value for your project.
For more information or inquiries, contact Natron Steel today and experience premium-grade Duplex Steel Pipes at competitive prices.
Duplex Tubes Chemical Composition
| Grade | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Ni | Cr | Mo | N | Cu |
| S31803 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 21.0–23.0 | 2.5–3.5 | 0.08–0.20 | – |
| S32205 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 22.0–23.0 | 3.0–3.5 | 0.14–0.20 | – |
| S32750 | 0.03 | 1.20 | 0.035 | 0.02 | 0.80 | 6.0-8.0 | 24.0-26.0 | 3.0-5.0 | 0.24-0.32 | 0.5 |
| S32760 | 0.05 | 1.00 | 0.03 | 0.01 | 1.00 | 6.0-8.0 | 24.0-26.0 | 3.0-4.0 | 0.20-0.30 | 0.50–1.00 |
Duplex Stainless Steel Pipes Mechanical Properties
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 / S32205 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
| S32750 / S32760 | 7.8 | 0.281 | 1350 | 2460 |
Duplex Steel Pipe and Tube Schedule Chart
| 1/8" IPS(.405" O.D.) | 3 1/2" IPS( 4.000" O.D.) |
|---|---|
| Seamless Pipes, SCH 40, 80 | Pipes, SCH 10, 40, 80, 160, XXH |
| 1/4" IPS(.540" O.D.) | 4" IPS(4.500" O.D.) |
| Pipes, SCH 10, 40, 80 | Seamless Pipes, SCH 10, 40, 80, 160, XXH |
| 3/8" IPS(.675" O.D.) | 5" IPS( 5.563" O.D.) |
| Seamless Pipes, SCH 10, 40, 80 | Pipes, SCH 10, 40, 80, 160, XXH |
| 1/2" IPS(.840" O.D.) | 6" IPS(6.625" O.D.) |
| Seamless Pipes, SCH 5, 10, 40, 80, 160, XXH | Seamless Pipes, SCH 5, 10, 40, 80, 120, 160, XXH |
| 3/4" IPS(1.050" O.D.) | 8 ” IPS(8.625" O.D.) |
| Pipes, SCH 10, 40, 80, 160, XXH | Stainless Pipes, SCH 5, 10, 40, 80, 120, 160, XXH |
| 1" IPS:(1.315′ O.D.) | 10" IPS(10.750" O.D.) |
| Seamless Pipes, SCH 5, 10, 40, 80, 160, XXH | Pipes, SCH 10, 20, 40, 80 (.500), TRUE 80(.500) |
| 1-1/4" IPS(1.660" O.D.) | 12" IPS(12.750" O.D.) |
| Seamless Pipes, SCH 10, 40, 80, 160, XXH | Pipes, SCH 10, 20, 40(.375), TRUE40(.406), SCH80(.500) |
| 1-1/2" IPS(1.900" O.D.) | 14" IPS(14.000" O.D.) |
| Seamless Pipes, SCH 10, 40, 80, 160, XXH | Pipes, SCH10 (.188), SCH40 (.375) |
| 2" IPS(2.375" O.D.) | 16" IPS(16.000" O.D.) |
| Seamless Pipes, SCH 10, 40, 80, 160, XXH | Pipes, SCH10(.188), SCH40(.375) |
| 2 1/2" IPS(2.875" O.D.) | 18" IPS (18.000" O.D.) |
| Seamless Pipes, SCH 10, 40, 80, 160, XXH | Pipes, SCH-40 (.375) |
| 3" IPS( 3.500" O.D.) | |
| Seamless Pipes, SCH 5, 10, 40, 80, 160, XXH |
ASTM A790 DSS Pipe Tube Weight Chart
| Outside Dia mm |
Wall Thk mm |
in. | Schedule | Kg/m |
|---|---|---|---|---|
| 13.72 | 1.65 | 1/4 | 10S | 0.50 |
| 13.72 | 2.24 | 1/4 | 40S | 0.64 |
| 13.72 | 3.02 | 1/4 | 80S | 0.81 |
| 17.15 | 1.65 | 3/8 | 10S | 0.64 |
| 17.15 | 2.31 | 3/8 | 40S | 0.86 |
| 17.15 | 3.20 | 3/8 | 80S | 1.12 |
| 21.34 | 2.11 | 1/2 | 10S | 1.02 |
| 21.34 | 2.77 | 1/2 | 40S | 1.29 |
| 21.34 | 3.73 | 1/2 | 80S | 1.65 |
| 26.67 | 2.11 | 3/4 | 10S | 1.30 |
| 26.67 | 2.87 | 3/4 | 40S | 1.71 |
| 26.67 | 3.91 | 3/4 | 80S | 2.23 |
| 33.40 | 2.77 | 1 | 10S | 2.13 |
| 33.40 | 3.38 | 1 | 40S | 2.54 |
| 33.40 | 4.55 | 1 | 80S | 3.29 |
| 33.40 | 6.352) | 1 | 160 | 4.30 |
| 42.16 | 2.77 | 1¼ | 10S | 2.73 |
| 42.16 | 3.56 | 1¼ | 40S | 3.44 |
| 42.16 | 4.85 | 1¼ | 80S | 4.53 |
| 42.16 | 6.352) | 1¼ | 160 | 5.69 |
| 48.26 | 2.77 | 1½ | 10S | 3.16 |
| 48.26 | 3.68 | 1½ | 40S | 4.11 |
| 48.26 | 5.08 | 1½ | 80S | 5.49 |
| 60.33 | 2.77 | 2 | 10S | 3.99 |
| 60.33 | 3.91 | 2 | 40S | 5.52 |
| 60.33 | 5.54 | 2 | 80S | 7.60 |
| 60.33 | 8.742) | 2 | 160 | 11.29 |
| 73.03 | 3.05 | 2½ | 10S | 5.35 |
| 73.03 | 5.16 | 2½ | 40S | 8.77 |
| 73.03 | 7.01 | 2½ | 80S | 11.59 |
| 88.90 | 3.05 | 3 | 10S | 6.56 |
| 88.90 | 5.49 | 3 | 40S | 11.47 |
| 88.90 | 7.62 | 3 | 80S | 15.51 |
| 88.90 | 11.132) | 3 | 160 | 21.67 |
| 101.60 | 3.05 | 3½ | 10S | 7.53 |
| 101.60 | 5.74 | 3½ | 40S | 13.78 |
| 101.60 | 8.08 | 3½ | 80S | 18.92 |
| 114.30 | 3.05 | 4 | 10S | 8.50 |
| 114.30 | 6.02 | 4 | 40S | 16.32 |
| 114.30 | 8.56 | 4 | 80S | 22.67 |
| 114.30 | 13.492) | 4 | 160 | 34.05 |
| 141.30 | 6.55 | 5 | 40S | 22.10 |
| 141.30 | 9.53 | 5 | 80S | 31.44 |
| 141.30 | 15.882) | 5 | 160 | 49.87 |
| 168.28 | 3.4 | 6 | 10S | 14.04 |
| 168.28 | 7.11 | 6 | 40S | 28.69 |
| 168.28 | 10.97 | 6 | 80S | 43.21 |
| 168.28 | 14.27 | 6 | 120 | 54.75 |
| 168.28 | 18.262) | 6 | 160 | 68.59 |
| 219.08 | 8.18 | 8 | 40S | 43.20 |
| 219.08 | 12.7 | 8 | 80S | 65.63 |
| 219.08 | 18.23 | 8 | 120 | 91.30 |
| 219.08 | 23.012) | 8 | 160 | 112.97 |
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- Stainless Steel Welded Pipes and Tubes
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- Super Duplex Steel Pipes and Tubes
- Carbon Steel Pipes and Tubes
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- Brass Pipes
- Heavy Thickness Seamless Pipes
- High Nickel Alloy Pipes
