Duplex Steel S31803 Sanitary Tubes, Duplex Steel 31803 Sanitary Tubes, 31803 Duplex Steel Sanitary Tube Manufacturer, Duplex Steel 31803 Sanitary Tube Supplier, Duplex Steel 31803 Sanitary Tube Exporter, Duplex Steel 31803 Precision Tubing, Duplex Steel 31803 Small Diameter Tube ,Duplex Steel 31803 Sanitary Tubes
Duplex Steel S31803 Sanitary Tubes are a specialized category of tubing used primarily in industries requiring high levels of hygiene, such as food processing, pharmaceuticals, and biotechnology. These tubes are manufactured using Duplex Stainless Steel grade S31803, a nitrogen-enhanced duplex alloy that offers a balanced microstructure of austenite and ferrite. This composition provides a unique combination of strength, corrosion resistance, and durability, making these tubes ideal for environments where both cleanliness and mechanical performance are critical.
One of the key features of Duplex S31803 sanitary tubes is their exceptional corrosion resistance, especially against stress corrosion cracking, pitting, and crevice corrosion. This makes them highly suitable for applications involving aggressive chemicals or salty and acidic environments. In industries where sanitation is crucial, such as dairy or beverage production, the resistance to corrosion ensures long-term performance and reduces the risk of contamination due to metal degradation.
Another significant advantage of these sanitary tubes is their mechanical strength, which is considerably higher than that of standard austenitic stainless steels such as 304 or 316. This allows for the use of thinner wall sections while maintaining high pressure resistance, thereby reducing overall weight and cost without compromising safety or performance. The high yield strength of Duplex S31803 also leads to better resistance to deformation and wear during use or installation.
In terms of sanitary design, these tubes are produced with extremely smooth internal surfaces, often polished to mirror finishes, to prevent the buildup of residues and microorganisms. This smoothness is essential for clean-in-place (CIP) and sterilize-in-place (SIP) processes, commonly used in hygiene-sensitive industries. The tubes are also manufactured to tight dimensional tolerances and undergo rigorous quality control to ensure leak-proof connections and system integrity.
Specification of Duplex Steel S31803 Sanitary Tubes
| Specification Category | Details |
|---|---|
| Material Grade | Duplex Stainless Steel UNS S31803 / 1.4462 |
| Standards | ASTM A789 / A790, ASME SA789 / SA790, ASTM A270 (for sanitary applications) |
| Chemical Composition | |
| - Chromium (Cr) | 21.0 – 23.0% |
| - Nickel (Ni) | 4.5 – 6.5% |
| - Molybdenum (Mo) | 2.5 – 3.5% |
| - Manganese (Mn) | ≤ 2.0% |
| - Silicon (Si) | ≤ 1.0% |
| - Nitrogen (N) | 0.08 – 0.20% |
| - Carbon (C) | ≤ 0.030% |
| - Phosphorus (P) | ≤ 0.030% |
| - Sulfur (S) | ≤ 0.020% |
| Mechanical Properties | |
| - Tensile Strength | ≥ 620 MPa (90 ksi) |
| - Yield Strength (0.2% offset) | ≥ 450 MPa (65 ksi) |
| - Elongation | ≥ 25% |
| - Hardness | ≤ 290 HB |
| Dimensions | |
| - Outer Diameter (OD) | 1/2" to 8" (12.7 mm to 219.1 mm) |
| - Wall Thickness | 0.5 mm to 5 mm (or as per requirement) |
| - Length | Up to 6 meters (custom cut lengths available) |
| Surface Finish | Polished (180 grit, 240 grit, 320 grit, or mirror finish for sanitary use) |
| End Finish | Plain End, Beveled End, or Sanitary Tri-Clamp Fittings |
Overall, Duplex Steel S31803 sanitary tubes combine excellent hygienic properties, corrosion resistance, and mechanical performance, making them a preferred choice in sectors where both structural integrity and cleanliness are paramount. Their long service life, low maintenance requirements, and compatibility with rigorous sanitation protocols help industries maintain safety standards while optimizing operational efficiency.
Chemical Composition of Duplex Steel S31803 Sanitary Tubes
| Element | Symbol | Percentage (%) |
|---|---|---|
| Chromium | Cr | 21.0 – 23.0 |
| Nickel | Ni | 4.5 – 6.5 |
| Molybdenum | Mo | 2.5 – 3.5 |
| Manganese | Mn | ≤ 2.00 |
| Silicon | Si | ≤ 1.00 |
| Nitrogen | N | 0.08 – 0.20 |
| Carbon | C | ≤ 0.030 |
| Phosphorus | P | ≤ 0.030 |
| Sulfur | S | ≤ 0.020 |
| Iron (Balance) | Fe | Balance (remainder) |
With a proven track record as a Duplex Steel S31803 Sanitary 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 Sanitary Tubes
| Specification Category | Details |
|---|---|
| Material Grade | Duplex Stainless Steel UNS S31803 / 1.4462 |
| Standards | ASTM A789 / A790, ASME SA789 / SA790, ASTM A270 (for sanitary applications) |
| Chemical Composition | |
| - Chromium (Cr) | 21.0 – 23.0% |
| - Nickel (Ni) | 4.5 – 6.5% |
| - Molybdenum (Mo) | 2.5 – 3.5% |
| - Manganese (Mn) | ≤ 2.0% |
| - Silicon (Si) | ≤ 1.0% |
| - Nitrogen (N) | 0.08 – 0.20% |
| - Carbon (C) | ≤ 0.030% |
| - Phosphorus (P) | ≤ 0.030% |
| - Sulfur (S) | ≤ 0.020% |
| Mechanical Properties | |
| - Tensile Strength | ≥ 620 MPa (90 ksi) |
| - Yield Strength (0.2% offset) | ≥ 450 MPa (65 ksi) |
| - Elongation | ≥ 25% |
| - Hardness | ≤ 290 HB |
| Dimensions | |
| - Outer Diameter (OD) | 1/2" to 8" (12.7 mm to 219.1 mm) |
| - Wall Thickness | 0.5 mm to 5 mm (or as per requirement) |
| - Length | Up to 6 meters (custom cut lengths available) |
| Surface Finish | Polished (180 grit, 240 grit, 320 grit, or mirror finish for sanitary use) |
| End Finish | Plain End, Beveled End, or Sanitary Tri-Clamp Fittings |
🏭 Industry & Application
- ✅ Duplex Steel S31803 Sanitary Tubes for Medical Industry
- ✅ Duplex Steel S31803 Sanitary Tubes for Chemical Processing
- ✅ Duplex Steel S31803 Tubes for Sanitary Lines
- ✅ Duplex Steel S31803 Sanitary Tubes for Gas & Liquid Flow
- ✅ Duplex Steel S31803 Tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1:What is Duplex Steel S31803?
Duplex Steel S31803 (also known as UNS S31803 or 1.4462) is a duplex stainless steel with a balanced microstructure of austenite and ferrite. It offers excellent strength and superior corrosion resistance compared to standard austenitic stainless steels like 304 or 316.
Q2:Why is S31803 used for sanitary tubes?
S31803 is used in sanitary tubing due to its high resistance to corrosion (especially stress corrosion cracking and pitting), high mechanical strength, and compatibility with hygienic environments. These properties make it ideal for industries like pharmaceuticals, food processing, and beverage production.
Q3:What surface finishes are available for sanitary tubes?
180 grit 240 grit 320 grit Mirror finish (electropolished)
Duplex Steel S31803 Sanitary Tubes exporter
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