Incoloy 825 Flanges Manufacturer & Supplier

Midland Alloys Inc. is a leading manufacturer and supplier of high-quality Incoloy 825 flanges that are known for their exceptional performance in corrosive industrial settings. These flanges are made of a nickel-iron-chromium alloy that includes molybdenum, copper, and titanium, making them resistant to both reducing and oxidizing acids. They withstand sulfuric and phosphoric acids, offer high strength, and work reliably across a wide temperature range. Available in slip-on, socket weld, weld neck, threaded, and blind flange types. Common uses include chemical processing, pollution control, marine exhausts, and nuclear fuel reprocessing. Our flanges meet ASTM B564, ASME SB564, and NACE standards.

Incoloy 825 Flanges Overview

Incoloy 825 is a titanium-stabilized nickel-iron-chromium alloy with added molybdenum and copper. It offers strong protection against many corrosive environments. It also resists pitting and cracking caused by chlorides. The typical Incoloy 825 chemical composition includes around 42% nickel, 22% iron, 20% chromium, 3% molybdenum and 2% copper. Each element increases the flange’s strength and corrosion resistance. This makes it suitable for harsh industrial environments. These flanges work well at room and high temperatures. Incoloy 825 flange pressure ratings stay reliable in systems involving strong acids and oxidizing agents.

Benefits of Incoloy 825 Flanges

Incoloy 825 flanges offer strong performance in harsh, corrosive conditions. These flanges provide long service life with minimal upkeep. Below are benefits of Incoloy 825 flanges:

Resists sulfuric and phosphoric acids in both reducing and oxidizing settings.
Can withstand chloride-induced cracking, pitting, and crevice corrosion.
Maintains mechanical strength up to 540°C (1000°F).
Titanium-stabilized flange material resists intergranular corrosion after welding.
Suitable for chemical plants, pickling units, marine systems, and pollution control.
Provides long-term durability with minimal maintenance in corrosive environments.
Offers good fabricability and weldability using standard shop methods.
Meets ASTM B564 Incoloy 825 flanges and other industry quality norms.

Incoloy 825 Flanges Size and Specification

The size and specification details of Incoloy 825 flanges help you select the best fit for your project. This includes pressure ratings, flange types, and dimensional ranges commonly used in various industries.

Types of Incoloy 825 Flanges

Incoloy 825 flanges come in a variety of types to suit different pipe connections and pressure needs. Each flange type offers unique features for safe and reliable use in corrosive environments. Following are most common types:

Manufacturing Types

SORF (Slip-On Raised Face)

Slides over the pipe and gets welded for easy installation in low-pressure systems.
BLRF (Blind Raised Face)

Closes off pipe ends; used for testing or sealing flow in a system.
SWRF (Socket Weld Raised Face)

Pipe fits into a recessed area and is welded around the edge. Ideal for small-bore, high-pressure lines.
WNRF (Weld Neck Raised Face)

Has a long, tapered hub and welds to the pipe for strong, leak-proof joints under high pressure.

Face Forms

Raised Face (RF)

The most common type has a raised surface that improves gasket sealing in medium to high pressure.
Ring Type Joint (RTJ)

Uses a metal ring for sealing and works well in high-pressure, high-temperature services.
Flat Face (FF)

Flat surface flange used with cast iron or low-pressure piping where full face gasket is needed.
Lap-Joint Face (LJF)

Used with stub ends and are easy to align and install. Good for systems that need frequent dismantling.

Contact Midland Alloys Inc. for Your Incoloy 825 Flanges Needs

Contact us today to discuss how Incoloy 825 Flanges can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.

Technical Details & Delivery Condition

Chemical Composition of ASTM B564 Incoloy Flange

Chemical composition of incoloy 825 flange includes the prcise mix of elements in the alloy. Knowing this enables you to determine whether the material meets your corrosion and temperature specifications.

Grade	Cr	Fe	Ni	C	Mn	Cu	Si	S
Incoloy 825	19.5 – 23.5	1.0 max	38.0 – 46.0	0.05 max	1.0 max	1.5 – 3.0	0.5 max	0.03 max

Mechanical & Physical Properties of Incoloy 825 Flanges

Mechanical and physical properties of Incoloy 825 flanges show how the material performs under stress, heat and pressure. It is useful for confirming strength, durability, and safe application.

Density	Melting Point	Tensile Strength	Yield Strength (0.2% Offset)	Elongation
8.47 g/cm3	1413 °C (2580 °F)	Psi – 95,000 , MPa – 655	Psi – 45,000 , MPa – 310	40 %

Incoloy 800/800H/800HT Flanges Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	AFNOR	GOST	JIS	BS	EN	OR
Incoloy 825	2.4858	N08825	NC 21 FeDU	XH38BT	NCF 825	NA 16	NiCr21Mo	ЭП703

Temperature Range of Inconel 825 Flanges

The temperature range of Inconel 825 flanges gives you clarity on how hot or cold the flange can handle. This helps prevent failure in extreme service conditions.

Grade	Temperature Range
Incoloy 825	-215 °C to 540 °C

Incoloy ALLOY 825 Stainless Steel Flanges Sizes

Normal Sizes (in)	Dimension	Flanges Dimensional Sizes 1/2 in to 2 1/2 in
		Class 125 / 150		Class 300		Class 400		Class 600		Class 900		Class 1500		Class 2500
		in	mm	in	mm	in	mm	in	mm	in	mm	in	mm	in		mm
1/2	A	3 1/2	88.9	3 3/4	95.2	3 3/4	95.2	3 3/4	95.2	4 3/4	121	4 3/4	121	5 1/4	133.4
	b	7/16	11.1	9/16	14.3	9/16	14.3	9/16	14.3	7/8	22.2	7/8	22.2	1 3/16	30.2
	D2	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9	1 3/8	34.9
	D1	2 3/8	60.3	2 5/8	66.7	2 5/8	66.7	2 5/8	66.7	3 1/4	82.6	3 1/4	82.6	3 1/2	88.9
	n	4	4	4	4	4	4	4	4	4	4	4	4	4	4
	d	5/8	15.9	5/8	15.9	5/8	15.9	5/8	15.9	7/8	22.2	7/8	22.2	7/8	22.2

Incoloy Flanges Grades We Offer

Incoloy Flanges

Incoloy 800/800H/800HT Flanges

Incoloy 825 Flanges

Manufacturing Process of Incoloy 825 Flanges

Plate

Shear

Press

Inspection

Lathe

Drilling

Cleaning

Flange

Inspection

Analytic

Marking

Packing & Shipping

Industrial Applications

Incoloy 825 flanges are used in industries that face heat, pressure, and corrosion. Power generation plants use them for their strength and long service life. Oil and gas plants use these flanges in pipelines and processing units. The petrochemical industry uses these flanges in harsh chemical systems. Nuclear energy plants for high-temperature zones. They are also utilized in sea water exchangers due to strong corrosion resistance. These flanges help systems run safely and last longer in tough environments.

Offshore Industry

Nuclear Industries

Refineries

Ship Building

Aerospace

Pharmaceutical

Incoloy 825 Flanges Certifications & Compliance

We provide incoloy 825 flanges with trusted certifications, ensuring quality and reliability. We are an ISO 9001-certified company and a certified exporter. Our flanges meet PED standards and include Mill Test Certificates for complete traceability. We also provide NABL-approved test reports on request. These certifications confirm that our products follow strict industry norms and perform well in demanding conditions.

Testing & Packaging

We test every Incoloy 825 flange to ensure it meet quality standards. We use PMI to check material grade, UT for internal flaws, hydro testing for pressure strength, and visual checks for surface finish. Each flange goes through these steps before packing. For safe shipping, we wrap the flanges in plastic, place them in strong wooden boxes, and add export labels for easy tracking. This helps protect the product from moisture, dust, or damage during transport and ensures it arrives in clean, ready-to-use condition.

Why Choose Us?

Engineers choose Midland Alloys Inc. for reliable quality, fast service, and trusted support. As an ISO 9001, PED, and IBR certified manufacturer, we adhere to industry standards. Our global export network enables us to deliver products on time worldwide. We also provide custom lengths, finishes, and coil forms to meet specific project requirements. Each order has complete material traceability. Our 24/7 customer support team helps with quick answers and technical guidance. When you choose Midland Alloys Inc you get high quality products and service.

FAQs

What is the temperature range for safe use of Incoloy 825 flanges?

Incoloy 825 flanges are safe to use at cryogenic temperatures up to 540°C (1000°F).

Can Incoloy 825 flanges be used in seawater or marine applications?

Yes. Incoloy 825 flanges are resistant to chloride corrosion which make them ideal for seawater and marine applications.

What pressure ratings are available for Incoloy 825 flanges?

Incoloy 825 flanges are available with pressure ratings ranging from Class 150 to Class 2500.

Products Categories

ISO Certificate