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

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

Inconel®, Incoloy® and Monel® are registered trademarks of Special Metals Corporation and its subsidiaries.
The Incoloy 27-7MO alloy is a superaustenitic stainless steel containing 7% molybdenum. It exhibits greater resistance to corrosion than superaustenitic steels containing 6% molybdenum under most conditions. In many environments, Incoloy 27-7MO (UNS S31277) provides resistance comparable to that of materials with significantly higher alloying levels, such as INCONEL alloys 625, 22 and C-276.
Typically, Incoloy 27-7MO products contain 27% nickel, 22% chromium, 7.2% molybdenum and 0.34% nitrogen. Due to its molybdenum, chromium and nitrogen content, the 27-7MO alloy demonstrates high resistance to pitting and crevice corrosion. Nickel, nitrogen and molybdenum secure resistance to reducing media, while a high chromium content provides resistance to oxidising media. Incoloy 27-7MO is suitable for use in mixed acidic environments, particularly those containing both oxidising and reducing acids.
Other Trade Designation: Alloy 27-7MO, UNS S31277

Specifications for Flanges Made from the Incoloy 27-7MO Alloy:

Metal type: UNS S31277
Standard: ASTM A 479/ASME SA 479, ASTM A182

Chemical composition, %.

Applications of Incoloy 27-7MO:

Incoloy 27-7MO combines corrosion resistance, high strength and ease of fabrication. Consequently, numerous industries utilise this material. These include:

1. Chemical Processing:
• It is applied in the chemical industry because it reduces corrosion risk in aggressive chemical environments.
2. Shipbuilding:
• It is used in shipbuilding where resistance to seawater and salt spray corrosion is essential.
3. Pollution Control Plants:
• It is employed in the construction of environmental protection facilities given its resistance to corrosive gases and chemicals.
4. Pulp and Paper Industry:
• It is incorporated in components for pulp and paper processing, thereby reducing corrosion in production environments.
5. Oil and Gas Extraction:
• It is utilised in oil and gas extraction given that resistance to corrosive elements is critical for the durability of installations.