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Incoloy 800/825 Flanges: Strength, Resistance, and Versatility by Sandvik

When high-performance and corrosion resistance are top priorities, engineers and industries turn to Incoloy 800/825 Flanges. At Sandvik, we specialize in manufacturing and supplying these premium-grade flanges designed to perform in the most aggressive environments. Whether you're building offshore platforms or chemical plants, these flanges offer unmatched durability and efficiency. Let’s break down what makes Incoloy 800 and 825 flanges such a powerhouse in the industrial world.

What is Incoloy 800/825 Flanges? These are industrial pipe flanges made from Incoloy alloys—primarily nickel-iron-chromium blends. Incoloy 800 and 825 are known for their high-temperature strength and excellent corrosion resistance, especially in acidic and oxidizing environments. Incoloy 800 is ideal for structural stability at elevated temperatures, while Incoloy 825 includes molybdenum and copper for improved resistance to acidic environments like sulfuric and phosphoric acids. Together, they cover a wide range of critical applications.

Advantages of Incoloy 800/825 Flanges include thermal stability, corrosion resistance, and long service life. These flanges resist stress corrosion cracking, oxidation, and carburization. They also maintain strength at high temperatures, making them ideal for heat exchangers and nuclear reactors. Their metallurgical stability ensures minimal maintenance and extended lifespan, saving costs in long-term operations.

Industries across the globe trust Incoloy 800/825 Flanges Manufacturers like Sandvik for applications where standard stainless steel fails. From petrochemical units to marine engineering, these flanges offer reliable sealing and structural performance under pressure.

Applications and Uses of Incoloy 800/825 Flanges span across multiple sectors. In the oil and gas industry, they’re used in offshore rigs, heat exchangers, and separation equipment. In chemical processing, they handle highly corrosive substances with ease. Power plants use them in superheaters and reheat piping systems. Food processing and pharmaceuticals industries also rely on these flanges for clean, durable, and contaminant-resistant fittings. Their ability to resist corrosion and withstand high pressure makes them a favorite for desalination plants and marine hardware as well.

As one of the leading Incoloy 800/825 Flanges Suppliers, Sandvik ensures that all products meet international standards like ASTM B564 and ASME B16.5, guaranteeing optimal performance under extreme conditions.

Types of Incoloy 800/825 Flanges include:

Slip-On Flanges: Easy to install and weld, ideal for low-pressure pipelines and general utility service.

Weld Neck Flanges: Designed for high-pressure applications; offer excellent stress distribution and fatigue resistance.

Socket Weld Flanges: Perfect for small-diameter, high-pressure pipelines, ensuring leak-proof performance.

Blind Flanges: Used to seal pipe ends or pressure vessel openings, excellent for inspection points.

Threaded Flanges: Require no welding, suitable for explosive or flammable environments where welding is risky.

Lap Joint Flanges: Often used with stub ends in systems that require frequent dismantling for cleaning or inspection.

At Sandvik, we are proud to be among the top Incoloy 800/825 Flanges Stockists, offering quick deliveries, competitive pricing, and full material traceability. We maintain a robust inventory of all flange types and sizes to meet urgent and bulk requirements worldwide.

We also serve global markets as trusted Incoloy 800/825 Flanges Exporters, shipping corrosion-resistant flange solutions to various countries with full compliance and documentation support.

If your project demands high-performance flanges that won’t compromise under pressure, Incoloy 800/825 flanges from Sandvik are the smart, durable choice. Contact us today to learn more or request a quote.

Specification of Incoloy 800/825 Flanges

Inconel Flanges Specification : ASTM B564 / ASME SB564
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 Incoloy 800/825 Flanges

STANDARD WERKSTOFF NR. UNS GOST AFNOR JIS BS EN OR
Incoloy 800 1.4876 N08800 ЭИ670 Z8NC32-21 NCF 800 NA 15 X10NiCrAlTi32-20 XH32T
Incoloy 800H 1.4958 / 1.4876 N08810 ЭИ670 Z8NC33-21 NCF 800H NA 15(H) X5NiCrAlTi31-20 XH32T
Incoloy 800HT 1.4859 / 1.4876 N08811 ЭИ670 - NCF 800HT NA 15(HT) X8NiCrAlTi32-21 XH32T
Incoloy 825 2.4858 N08825 协袩703 NFE30C20DUM NCF 825 NA 16 NiCr21Mo XH38BT

Chemical Composition of Incoloy 800/825 Flanges

Grade C Mn Si S Cu Fe Ni Cr Al Ti
800 0.10 max 1.50 max 1.00 max 0.015 max 0.75 max 39.50 min 30.00 – 35.00 19.00 – 23.00 0.15 – 0.60 0.15 – 0.60
800H 0.05 – 0.10 1.50 max 1.00 max 0.015 max 0.75 max 39.50 min 30.00 – 35.00 19.00 – 23.00 0.15 – 0.60 0.15 – 0.60
800HT 0.06 – 0.10 1.50 max 1.00 max 0.015 max 0.75 max 39.50 min 30.00 – 35.00 19.00 – 23.00 0.15 – 0.60 0.15 – 0.60
Alloy 825 0.05 max 1.0 max 0.5 max 0.03 max 1.5 – 3.0 22.0 min 38.0 – 46.0 19.5 – 23.5 0.2max 0.6 – 1.2

Mechanical Properties of Incoloy 800/825 Flanges

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
Alloy 800 / 800H / 800HT 7.94 g/cm3 1385 °C (2525 °F) Psi – 75,000 , MPa – 520 Psi – 30,000 , MPa – 205 30 %
Alloy 825 8.14 g/cm3 1400 °C (2550 °F) Psi – 80,000 , MPa – 550 Psi – 32,000 , MPa – 220 30 %