Duplex Steel S31803 Condenser Tubes, Duplex Steel 31803 Condenser Tubes, 31803 Duplex Steel Condenser Tube Manufacturer, Duplex Steel 31803 Condenser Tube Supplier, Duplex Steel 31803 Condenser Tube Exporter, Duplex Steel 31803 Precision Tubing, Duplex Steel 31803 Small Diameter Tube ,Duplex Steel 31803 Condenser Tubes
Duplex Steel S31803 condenser tubes offered by Sumer Metal Industries Private Limited combine the high strength of martensitic steels with the corrosion resistance of austenitic grades, making them ideal for demanding heat-exchange and condenser applications. Manufactured under strict quality controls, these tubes are designed to withstand chloride stress-corrosion cracking, erosion from high-velocity fluids, and general seawater exposure — conditions commonly encountered in power plants, desalination units, petrochemical condensers, and HVAC systems. Sumer Metal Industries emphasizes traceability, certified raw-material sourcing, and finishing options suitable for welding or mechanical joining on site.
As a supplier and exporter, Sumer Metal Industries ships S31803 condenser tubes across the Middle East (Oman, Qatar, Saudi Arabia, the UAE, Kuwait), to European markets (Spain, Germany), and to North America (USA, Canada), as well as multiple markets across Africa. Export packing is tailored to preserve surface finish and dimensional accuracy during sea and air transit: wooden crates, VCI film wrapping, end-cap protection and full documentation packages (MTC, chemical & mechanical test reports, NDT where required). The company supports customer requests for special coatings, annealing, and pickling to meet project specifications.
Typical specifications for S31803 tubes from Sumer Metal Industries include composition controls (balanced Cr–Ni–Mo with nitrogen to stabilize ferrite), duplex microstructure (approx. 40–60% ferrite/austenite depending on heat treatment), and dimensions available in seamless and welded tube forms. Tubes are supplied in common international standards and can be supplied to custom tolerances on request. Sumer Metal’s production follows recognized test procedures for hardness, tensile, impact testing at ambient temperatures, as well as PMI or spectrochemical verification on request.
Mechanical performance of S31803 condenser tubes is a strong selling point: duplex steels deliver significantly higher yield and tensile strengths than standard austenitic grades, enabling thinner walls for a given pressure rating and improved thermal efficiency. Typical mechanical characteristics (factory verification advised for each heat) include high yield strength, excellent fatigue resistance, and good notch toughness at ambient temperatures. These properties allow designers to reduce material usage while maintaining safety margins, an attractive economic and engineering benefit for large condenser bundles.
Specification of Duplex Steel S31803 Condenser Tubes
| Property | Specification / Standard | Value / Range | Remarks |
|---|---|---|---|
| Material Grade | ASTM / UNS / EN | S31803 / 1.4462 / Duplex 2205 | Duplex stainless steel |
| Product Form | - | Seamless / Welded Tubes | Standard condenser tube form |
| Outer Diameter (OD) | - | 6.35 mm – 38.10 mm | Custom sizes available on request |
| Wall Thickness | - | 0.89 mm – 6.35 mm | Depends on diameter and design pressure |
| Length | - | 3 m / 6 m / custom | Can be cut to project requirements |
| Surface Finish | - | Pickled, Sand Blasted or Polished | Optional per customer requirement |
| Tensile Strength | ASTM A789 / A790 | 620 – 850 MPa | Depends on heat treatment |
| Yield Strength (0.2% offset) | ASTM A789 / A790 | 450 – 550 MPa | Measured at room temperature |
| Elongation | ASTM A789 / A790 | ≥ 20% | 50 mm gauge length |
| Hardness | HB | ≤ 290 | Depends on heat and treatment |
| Corrosion Resistance | - | Excellent resistance to chloride stress corrosion, pitting & crevice corrosion | Recommended for seawater condensers |
| Standards Compliance | ASTM / ASME / EN | A789 / A790 / 1.4462 | International standard compliant |
| Certification | EN 10204 | 3.1 / 3.2 Mill Test Certificate (MTC) | Chemical & mechanical test reports provided |
Chemical resistance of S31803 makes it suitable for many condenser environments — particularly where chloride concentrations, intermittent temperatures, or high flow velocities make standard stainless steels vulnerable. The controlled addition of molybdenum and nitrogen enhances pitting and crevice corrosion resistance; chromium and nickel provide bulk corrosion stability; while the duplex microstructure limits susceptibility to stress corrosion cracking. Sumer Metal Industries offers material certificates and corrosion testing data on request to help end users validate suitability for their specific fluid chemistries and operating temperatures.
Chemical Composition of Duplex Steel S31803 Condenser Tubes
| Element | Typical Range (wt%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.020 |
| Chromium (Cr) | 21.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Nitrogen (N) | 0.08 – 0.20 |
| Iron (Fe) | Balance |
With a proven track record as a Duplex Steel S31803 Condenser Tubes exporter in over 30 countries, Sumer Metal Industries ensures global availability, third-party inspection support, and client-specific customization. Our wide export network combined with strict quality standards has made us a preferred choice for SS 31803 tubing worldwide.
Specification of Duplex Steel S31803 Condenser Tubes
| Property | Specification / Standard | Value / Range | Remarks |
|---|---|---|---|
| Material Grade | ASTM / UNS / EN | S31803 / 1.4462 / Duplex 2205 | Duplex stainless steel |
| Product Form | - | Seamless / Welded Tubes | Standard condenser tube form |
| Outer Diameter (OD) | - | 6.35 mm – 38.10 mm | Custom sizes available on request |
| Wall Thickness | - | 0.89 mm – 6.35 mm | Depends on diameter and design pressure |
| Length | - | 3 m / 6 m / custom | Can be cut to project requirements |
| Surface Finish | - | Pickled, Sand Blasted or Polished | Optional per customer requirement |
| Tensile Strength | ASTM A789 / A790 | 620 – 850 MPa | Depends on heat treatment |
| Yield Strength (0.2% offset) | ASTM A789 / A790 | 450 – 550 MPa | Measured at room temperature |
| Elongation | ASTM A789 / A790 | ≥ 20% | 50 mm gauge length |
| Hardness | HB | ≤ 290 | Depends on heat and treatment |
| Corrosion Resistance | - | Excellent resistance to chloride stress corrosion, pitting & crevice corrosion | Recommended for seawater condensers |
| Standards Compliance | ASTM / ASME / EN | A789 / A790 / 1.4462 | International standard compliant |
| Certification | EN 10204 | 3.1 / 3.2 Mill Test Certificate (MTC) | Chemical & mechanical test reports provided |
🏭 Industry & Application
- ✅ Duplex Steel S31803 Condenser Tubes for Medical Industry
- ✅ Duplex Steel S31803 Condenser Tubes for Chemical Processing
- ✅ Duplex Steel S31803 Tubes for Condenser Lines
- ✅ Duplex Steel S31803 Condenser Tubes for Gas & Liquid Flow
- ✅ Duplex Steel S31803 Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1: What makes S31803 duplex tubes better for condensers than standard 304/316 stainless steel?
A1: S31803 (Duplex 2205 family) has higher yield and tensile strength and superior resistance to chloride stress corrosion cracking and pitting. This allows thinner walls and improved lifetime in seawater or high-chloride condenser environments, reducing total installed cost.
Q2: Can S31803 tubes be welded and used with other stainless steel grades?
A2: Yes — S31803 can be welded with appropriate filler metals and procedures. Careful control of heat input and post-weld treatment (where specified) is recommended to preserve duplex microstructure and corrosion resistance. Sumer Metal provides welding guidance and can supply matched filler on request.
Q3: What documentation is supplied with exported S31803 condenser tubes?
A3: Typical export documentation includes Mill Test Certificate (MTC/EN 10204 3.1), chemical and mechanical test reports, dimensional inspection reports, packing list, and shipping documentation. Additional NDT or third-party inspection can be arranged per contract.
Duplex Steel S31803 Condenser Tubes exporter
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At Sumer Metal Industries Pvt. Ltd., we follow a zero-defect policy by implementing stringent quality checks, using certified raw materials, and continuously improving our processes to deliver reliable and consistent tubing solutions
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