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Premium Quality Stainless Steel 309/310/310S Flanges from Sandvik

At Sandvik, we specialize in producing top-grade Stainless Steel 309/310/310S Flanges engineered for high-temperature and corrosive environments. These flanges are widely trusted in industries where durability, heat resistance, and corrosion resistance are non-negotiable. Whether you're managing petrochemical pipelines, power plants, or heavy-duty mechanical systems, our SS 309, 310, and 310S flanges offer unmatched reliability.

So, what exactly are Stainless Steel 309/310/310S Flanges? They are forged or cast metal components used to connect pipes, valves, pumps, and other equipment to form a piping system. The 309/310/310S grades belong to the austenitic stainless steel family, known for their excellent resistance to oxidation and heat. Grade 309 has high chromium and moderate nickel content, while 310 and 310S have even better high-temperature strength and oxidation resistance. 310S is a low-carbon version of 310, which improves weldability and minimizes carbide precipitation during welding.

As leading Stainless Steel 309/310/310S Flanges Manufacturers, Sandvik ensures that every product meets international quality standards. The flanges are built to perform in aggressive conditions without cracking, warping, or losing structural integrity. Their strength at elevated temperatures makes them ideal for furnaces, boilers, heat exchangers, and other thermal applications. They're also easy to fabricate and install, which reduces project downtime and labor costs.

One major advantage of Stainless Steel 309/310/310S Flanges Suppliers like Sandvik is our ability to offer flanges that exhibit high corrosion resistance, even in extreme environments such as sulfur-rich atmospheres or marine settings. These flanges also maintain excellent creep strength and mechanical properties at elevated temperatures, offering long-term operational efficiency and reducing maintenance costs.

As trusted Stainless Steel 309/310/310S Flanges Exporters, we serve industries worldwide. You’ll find our flanges used in power generation, oil and gas, food processing, chemical plants, marine engineering, aerospace, pulp & paper industries, and thermal processing units. Their high thermal resistance and metallurgical stability make them essential for heat treatment equipment, incinerators, and reactors.

Being reputable Stainless Steel 309/310/310S Flanges Stockists, Sandvik offers a wide variety of flange types: Weld Neck Flanges: Ideal for high-pressure systems; they offer excellent stress distribution. Slip-On Flanges: Easy to align and install; suited for low-pressure applications. Blind Flanges: Used to close pipeline ends or pressure vessel openings. Socket Weld Flanges: Excellent for small-diameter pipes requiring high-pressure strength. Threaded Flanges: Useful in low-pressure, non-welded connections. Lap Joint Flanges: Best for systems that require frequent dismantling for inspection or cleaning.

With a robust inventory, custom size availability, and global shipping, Sandvik stands as your one-stop destination for high-performance Stainless Steel flanges. If you're looking for reliable and precise pipe connections that can take the heat—literally—our Stainless Steel 309/310/310S Flanges are the answer.

Specification of Stainless Steel 309/310/310S Flanges

Stainless Steel Flanges Specification : ASTM A182 / ASME SA182
Dimension Standard : ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Standard : ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size : 1/2" (15 NB) to 48" (1200NB)
Class / Pressure : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
DIN Flanges : DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673.
JIS Flanges : JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K
BS Flanges : BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H.

Equivalent Grades of Stainless Steel 309/310/310S Flanges

STANDARD UNS WNR. AFNOR EN JIS BS GOST
SS 309 S30900 1.4828 - - SUS 309 - -
SS 310 S31000 1.4841 / 1.4307 - X15CrNi25-20 SUS 310 310S24 20Ch25N20S2
SS 310S S31008 1.4845 - - SUS 310S - 20Ch23N18

Chemical Composition of Stainless Steel 309/310/310S Flanges

C Mn Si P S Cr Ni Fe
309 0.2 max 2.0 max 1.0 max 0.045max 0.03max 22 24 12-15 Balance
310 0.25 max 2.0 max 1.50 max 0.045max 0.03max 24-26 min: 8.0 max: 12.0 Balance
310S 0.08 max 2.00 max 1.50 max 0.045 0.03 24-26 19-22 Balance

Mechanical Properties of Stainless Steel 309/310/310S Flanges

Grade Tensile Strength ksi (min) Yield Strength 0.2% ksi (min) Elongation % Hardness (Brinell) MAX
309 40 30 40 217
310 Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 40% -
310S Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 40% -