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Stainless Steel 309 Welded Pipes

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SS 309 Welded Pipes – ASTM A312 TP309 / TP309H ERW & Spiral Welded Solutions

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We are a trusted manufacturer, supplier, and Stainless Steel 309 Welded Pipe Stockist offering premium quality SS 309 Welded Pipes engineered for high-temperature and corrosive industrial environments. With decades of industry experience and a strong export network, we supply Stainless Steel ASTM A312 TP309 Welded Pipes and ASTM A312 TP309H Stainless Steel Welded Pipes Stockist solutions to refineries, power plants, fabrication companies, and EPC contractors across India and global markets.

Our expertise in manufacturing, inspection, and global logistics ensures consistent quality, traceability, and reliable supply. As a recognized SS 309H Pipes Supplier Exporter in Mumbai India, we focus on delivering performance-driven materials that meet international standards and project specifications.

What Are SS 309 Welded Pipes?

SS 309 Welded Pipes are chromium-nickel austenitic stainless alloy products specifically developed for high-temperature service. With higher chromium and nickel content than 304 or 316 grades, 309 grade offers superior oxidation resistance and excellent strength at elevated temperatures. We manufacture and supply:

  • 309 Stainless Steel ERW Pipes
  • UNS S30900 Spiral Welded Pipe Stockist
  • Stainless Steel 309H Pipes
  • AISI 309H Stainless Steel ERW Pipe Supplier
  • Stainless Steel ASTM A312 TP309 Welded Pipes
  • ASTM A312 TP309H Stainless Steel Welded Pipes Stockist

The material designation ASTM A312 governs the production of austenitic stainless welded pipes for high-temperature and general corrosive service applications.

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New York City, Los Angeles, Chicago, Houston, Phoenix, Philadelphia, San Antonio, San Diego, Dallas, San Jose, Austin, Jacksonville, Fort Worth, Columbus, Charlotte, San Francisco, Indianapolis, Seattle, Denver, Washington, Boston, El Paso, Nashville, Detroit, Oklahoma City, Portland, Las Vegas, Memphis, Louisville, Baltimore, Milwaukee, Albuquerque, Tucson, Fresno, Mesa, Sacramento, Atlanta, Kansas City, Colorado Springs, Omaha, Raleigh, Miami, Long Beach, Virginia Beach, Oakland, Minneapolis, Tulsa, Tampa, Arlington, New Orleans, Wichita, Bakersfield, Cleveland, Aurora, Anaheim, Honolulu, Santa Ana, Riverside, Corpus Christi, Lexington, Henderson, Stockton, Saint Paul, Cincinnati, St. Louis, Pittsburgh, Greensboro, Lincoln, Anchorage, Plano, Orlando, Irvine, Newark, Durham, Chula Vista, Toledo, Fort Wayne, St. Petersburg, Laredo, Jersey City, Chandler, Madison, Lubbock, Scottsdale, Reno, Buffalo, Gilbert, Glendale, North Las Vegas, Winston-Salem, Chesapeake, Norfolk, Fremont, Garland, Irving, Hialeah, Richmond, Boise, Spokane, Baton Rouge, Tacoma, San Bernardino, Modesto, Fontana, Des Moines, Moreno Valley, Santa Clarita, Fayetteville, Birmingham, Oxnard, Rochester, Port St. Lucie, Grand Rapids, Huntsville, Salt Lake City, Frisco, Yonkers, Amarillo, Glendale, Huntington Beach, McKinney, Montgomery, Augusta, Aurora, Akron, Little Rock, Tempe, Columbus, Overland Park, Grand Prairie, Tallahassee, Cape Coral, Mobile, Knoxville, Shreveport, Worcester, Ontario, Vancouver, Sioux Falls, Chattanooga, Brownsville, Fort Lauderdale, Providence, Newport News, Rancho Cucamonga, Santa Rosa, Peoria, Oceanside, Elk Grove, Salem, Pembroke Pines, Eugene, Garden Grove, Cary, Fort Collins, Corona, Springfield, Jackson, Alexandria, Hayward, Clarksville, Lakewood, Lancaster, Salinas, Palmdale, Hollywood, Springfield, Macon, Kansas City, Sunnyvale, Pomona, Killeen, Escondido, Pasadena, Naperville, Bellevue, Joliet, Murfreesboro, Midland, Rockford, Paterson, Savannah, Bridgeport, Torrance, McAllen, Syracuse, Surprise, Denton, Roseville, Thornton, Miramar, Pasadena, Mesquite, Olathe, Dayton, Carrollton, Waco, Orange, Fullerton, Charleston, West Valley City, Visalia, Hampton, Gainesville, Warren, Coral Springs, Cedar Rapids, Round Rock, Sterling Heights, Kent, Columbia, Santa Clara, New Haven, Stamford, Concord, Elizabeth, Athens, Thousand Oaks, Lafayette, Simi Valley, Topeka, Norman, Fargo, Wilmington, Abilene, Odessa, Columbia, Pearland, Victorville, Hartford, Vallejo, Allentown, Berkeley, Richardson, Arvada, Ann Arbor, Rochester, Cambridge, Sugar Land, Lansing, Evansville, College Station, Fairfield, Clearwater, Beaumont, Independence, Provo, West Jordan, Murrieta, Palm Bay, El Monte, Carlsbad, North Charleston, Temecula, Clovis, Springfield, Meridian, Westminster, Costa Mesa, High Point, Manchester, Pueblo, Lakeland, Pompano Beach, West Palm Beach, Antioch, Everett, Downey, Lowell, Centennial, Elgin, Richmond, Peoria, Broken Arrow, Miami Gardens, Billings, Jurupa Valley, Sandy Springs, Gresham, Lewisville, Hillsboro, Ventura, Greeley, Inglewood, Waterbury, League City, Santa Maria, Tyler, Davie, Lakewood, Daly City, Boulder, Allen, West Covina, Sparks, Wichita Falls, Green Bay, San Mateo, Norwalk, Rialto, Las Cruces, Chico, El Cajon, Burbank, South Bend, Renton, Vista, Davenport, Edinburg, Tuscaloosa, Carmel, Spokane Valley, San Angelo, Vacaville, Clinton, Bend, Woodbridge.

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Product Specifications – SS 309 Welded Pipes 

  • Standard: ASTM A312 / ASME SA312
  • Grade: TP309 / TP309H
  • Type: ERW / Spiral Welded
  • Outer Diameter: ½” NB to 48” NB
  • Wall Thickness: SCH 10 to SCH XXS
  • Length: Single Random, Double Random, Cut Length
  • Finish: Annealed, Pickled, Polished

As an experienced ASTM A312 TP309H Stainless Steel Welded Pipes Stockist, we ensure full compliance with dimensional and metallurgical standards.

Chemical Composition of SS 309 / 309H

Element

SS 309 (%)

SS 309H (%)

Chromium (Cr)

22.0 – 24.0

22.0 – 24.0

Nickel (Ni)

12.0 – 15.0

12.0 – 15.0

Carbon (C)

≤ 0.08

0.04 – 0.10

Manganese (Mn)

≤ 2.00

≤ 2.00

Silicon (Si)

≤ 1.00

≤ 1.00

Phosphorus (P)

≤ 0.045

≤ 0.045

Sulfur (S)

≤ 0.030

≤ 0.030

The higher chromium and nickel content enhances oxidation resistance, making SS 309 Welded Pipes ideal for elevated temperature applications.

Mechanical Properties of Stainless Steel 309 / 309H

Property

SS 309

SS 309H

Tensile Strength (MPa)

≥ 515

≥ 515

Yield Strength (MPa)

≥ 205

≥ 205

Elongation (%)

≥ 40

≥ 40

Hardness (HB)

≤ 217

≤ 217

These mechanical values confirm the structural reliability of Stainless Steel ASTM A312 TP309 Welded Pipes under high-stress conditions.

Key Features of SS 309 Welded Pipes

  • Excellent resistance to oxidation
  • High temperature strength
  • Superior resistance to thermal shock
  • Good weldability and fabrication properties
  • Reliable creep resistance (309H variant)

Our AISI 309H Stainless Steel ERW Pipe Supplier solutions are preferred for projects requiring high integrity performance in aggressive thermal environments.

Manufacturing Process – ERW & Spiral Welded

We manufacture 309 Stainless Steel ERW Pipes using advanced Electric Resistance Welding (ERW) technology, ensuring uniform wall thickness, structural integrity, and excellent dimensional accuracy.

1. ERW (Electric Resistance Welded)

  • Continuous forming and welding

  • Clean internal weld seam

  • Ideal for structural and pressure applications

2. Spiral Welded

As a leading UNS S30900 Spiral Welded Pipe Stockist, we provide large-diameter spiral welded options for industrial piping systems, water transmission, and structural installations. Every pipe undergoes:

  • Hydrostatic testing

  • PMI testing

  • Radiography (if required)

  • Third-party inspection (TPI)

Grades We Offer – 309 & 309H

SS 309 (UNS S30900)

  • Excellent oxidation resistance up to 1035°C (1900°F)

  • Good corrosion resistance in mildly corrosive atmospheres

  • Suitable for furnace components and heat treatment equipment

The grade is also referred to under the unified numbering system as UNS S30900.

SS 309H (High Carbon Version)

Stainless Steel 309H Pipes are designed for enhanced creep resistance and higher strength at elevated temperatures. The higher carbon content improves structural stability under prolonged heat exposure.

Common designations include:

  • ASTM A312 TP309H Stainless Steel Welded Pipes Stockist

  • AISI 309H Stainless Steel ERW Pipe Supplier

The “H” variant aligns with high-temperature service conditions, especially in furnace and thermal processing industries.

Applications of SS 309 & 309H Welded Pipes

We supply to industries including:

  • Oil & Gas Processing
  • Petrochemical Plants
  • Power Generation Units
  • Heat Treatment Facilities
  • Cement Industries
  • Boiler and Furnace Manufacturing
  • Refineries and Chemical Processing Units

Stainless Steel 309H Pipes are widely used in:

  • Burner systems
  • Heat exchangers
  • Kilns
  • Thermal oxidizers
  • High-temperature ducting systems

Why Choose Us as Your Stainless Steel 309 Welded Pipe Stockist?

1. Proven Industry Experience

We have supplied SS 309 Welded Pipes for mission-critical applications across domestic and international projects.

2. Strict Quality Assurance

Each batch of Stainless Steel ASTM A312 TP309 Welded Pipes undergoes:

  • Raw material verification

  • Chemical testing

  • Mechanical testing

  • Visual and dimensional inspection

3. Export Expertise

As a recognized SS 309H Pipes Supplier Exporter in Mumbai India, we manage export packaging, documentation, and compliance smoothly for global shipments.

4. Transparent Traceability

Mill Test Certificates (MTC 3.1) are provided for every consignment to ensure full traceability.

Get High-Performance SS 309 & 309H Welded Pipes Today

Whether you require Stainless Steel 309H Pipes, 309 Stainless Steel ERW Pipes, or bulk supply under ASTM A312 TP309H Stainless Steel Welded Pipes Stockist specifications, we are ready to support your project with precision and commitment.

As a leading SS 309H Pipes Supplier Exporter in Mumbai India, we focus on quality, timely delivery, and long-term partnerships. Contact us today for technical assistance, pricing, and customized project solutions for SS 309 Welded Pipes.

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