NC1255 Incoloy 27-7MO (Alloy 27-7MO, UNS S31277) Flange

Incoloy 27-7MO Flange Description

Incoloy 27-7MO Flange is an advanced super-austenitic stainless steel containing 7% molybdenum, offering superior corrosion resistance compared to 6% molybdenum super-austenitic alloys. With a unique combination of nickel, chromium, molybdenum, and nitrogen, this alloy provides exceptional resistance to a wide range of corrosive environments, including reducing and oxidizing media.

The high chromium content makes it highly resistant to oxidizing conditions, while the molybdenum, nickel, and nitrogen provide resistance to reducing environments. It performs exceptionally well in mixed acid environments and resists stress corrosion cracking in all concentrations of sodium chloride up to saturation at boiling point.

This alloy is also highly resistant to seawater and brine, making it ideal for marine applications. Its corrosion resistance extends to aggressive media encountered in flue gas desulfurization systems, particularly in high-sulfur coal-fired power plants. Alloy 27-7MO is suitable for a variety of industries, including pollution control, power generation, marine, chemical processing, pulp and paper, and oil and gas.

Incoloy 27-7MO Flange Specifications

Metal Type: UNS S31277

Standard: ASTM A 240/ASME SA 240

Chemical Composition, %

Mechanical Property

Incoloy 27-7MO Flange Applications

As Incoloy 27-7MO offers a unique combination of corrosion resistance, high strength, and ease of fabrication, it is applied in many industries, such as pollution control, power, marine, chemical processing, pulp and paper, oil and gas, etc.

• Chemical Processing:

Widely used in the chemical industry for its outstanding corrosion resistance in aggressive chemical environments.

• Marine Engineering:

Applied in marine engineering applications where resistance to seawater and salt spray corrosion is essential.

• Pollution Control Equipment:

Utilized in the construction of pollution control equipment due to its ability to withstand corrosive gases and chemicals.

• Pulp and Paper Industry:

Found in components for pulp and paper processing, providing durability in corrosive paper manufacturing environments.

• Oil and Gas Extraction:

Employed in oil and gas extraction operations where resistance to corrosive elements is critical for equipment longevity

Incoloy 27-7MO Flange Packing

Our Incoloy 27-7MO Flange is carefully handled during storage and transportation to preserve the quality of our product in its original condition.

FAQs

Q1: What are the key features of INCOLOY Alloy 27-7MO?

• Corrosion Resistance: Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in mixed acid environments.
• High Strength: Superior strength at high temperatures, making it suitable for demanding industrial applications.
• Good Fabricability: Easy to fabricate and weld, allowing it to be used in complex designs and applications.
• Seawater and Brine Resistance: Exceptional resistance to seawater and brine, ideal for marine applications.

Q2: What are the primary applications of INCOLOY Alloy 27-7MO?

INCOLOY Alloy 27-7MO is used in industries where corrosion resistance and high strength are crucial. Key applications include:

• Flue Gas Desulfurization (FGD) Systems in power plants.
• Marine and Offshore Applications such as oil rigs and pipelines.
• Chemical Processing involving aggressive chemicals and mixed acids.
• Pulp and Paper Industry for pulp processing equipment.
• Oil and Gas production facilities exposed to corrosive environments.

Q3: Is INCOLOY Alloy 27-7MO resistant to stress corrosion cracking?

Yes, INCOLOY Alloy 27-7MO is highly resistant to stress corrosion cracking, particularly in environments with high concentrations of sodium chloride (saltwater). This makes it ideal for use in marine applications, offshore facilities, and chemical processing environments.