Alloy Steel F91 Flanges

Alloy Steel F91 Flanges

Alloy Steel F91 Flanges are critical components in various industrial applications, known for their exceptional strength, heat resistance, and corrosion resistance. These flanges are made from alloy steel F91, which is a high-strength, low-alloy steel that contains chromium and molybdenum as primary alloying elements. This alloy is widely recognized for its outstanding properties in high-temperature and high-pressure environments, making it an ideal choice for applications in industries such as petrochemical, power generation, and more.

High Temperature Resistance: One of the most significant advantages of Alloy Steel F91 flanges is their ability to withstand high temperatures. They maintain their mechanical properties at temperatures up to 600°C (1112°F), making them suitable for use in high-temperature processes.

Corrosion Resistance: The presence of chromium in the alloy imparts excellent corrosion resistance, ensuring the flanges remain durable and reliable in aggressive and corrosive environments.

High Strength: Alloy Steel F91 has a high tensile strength, making flanges made from this material capable of withstanding high-pressure conditions in industrial settings.

Creep Resistance: These flanges are designed to resist creep, which is the gradual deformation under constant load at elevated temperatures. This property is crucial in applications involving long-term, high-temperature exposure.

Weldability: Alloy Steel Grade 91 is weldable, allowing for ease of fabrication and installation. Proper welding techniques should be employed to maintain the material's integrity.

Alloy Steel F91 Flanges

Alloy Steel F91 flanges come in various types, such as weld neck, slip-on, socket weld, and blind flanges, to suit different piping and equipment connections. They are available in different sizes, pressure ratings, and facing types to meet specific project requirements.

Applications of Alloy Steel F91 flanges:

Power Generation: These flanges are widely used in power plants for applications like steam turbines, boilers, and high-pressure piping systems.

Petrochemical Industry: They are suitable for handling corrosive fluids and high-temperature processes in refineries and chemical plants.

Oil and Gas: Alloy Steel F91 flanges are used in the construction of pipelines, wellheads, and other equipment in the oil and gas industry.

Aerospace: In certain aerospace applications, these flanges are employed for their exceptional heat resistance and strength.

Manufacturing Process Of Alloy Steel F91 Flanges

Specification Of Alloy Steel F91 Flanges

Standard ASTM A181 / ASME SA181
Dimension ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Flanges Size 1/2" (15 NB) to 48" (1200NB) DN10~DN5000
Flange Face Type Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove
Pressure Class PN 2.5 TO PN 400
Pressure Rating ANSI Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
Pressure Calculation in DIN 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
Table D, E, F, H
Types Forged / Threaded / Screwed / Plate
Form Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange, Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange.
Flanges Marking All Flanges are marked as follows: Grade, Standard, Thickness, Heat No. (Or according to the customer’s request.)

Alloy Steel F91 Flanges Equivalent Grades

STANDARD UNS WERKSTOFF NR. Trade Name
Alloy Steel F91 K91560 1.4903 9Cr-1Mo-V

Chemical Composition of Alloy Steel F91 Flanges

Grade C Mn P S Si Cr Mo
F91 0.08-0.12 0.30-0.60 0.020 0.010 0.20-0.50 8.00-9.50 0.85-1.05

Mechanical Properties of Chrome Moly F91 Flanges

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min
Alloy Steel F91 415 585 20

Types Of Alloy Steel F91 Flanges

Alloy Steel Grade F91 Slip-On Flanges

Alloy Steel Grade F91 Slip-On Flanges

Alloy Steel F91 Weld Neck Flanges

Alloy Steel F91 Weld Neck Flanges

Chrome Moly Gr F91 Blind Flanges

Chrome Moly Gr F91 Blind Flange

Alloy Steel F91 Socket Weld Flange

Alloy Steel F91 Socket Weld Flange

CrMo F91 Ring Type Joint Flange

CrMo F91 Ring Type Joint Flange

Alloy Steel F91 Threaded Flanges

Alloy Steel F91 Threaded Flanges

Alloy Steel F91 Forged Flange

Alloy Steel F91 Forged Flange

Alloy Steel Gr.F91 Lap Joint Flange

Alloy Steel Gr.F91 Lap Joint Flange

Alloy Steel F91 Spectacle Blind Flange

Alloy Steel F91 Spectacle Blind Flange

UNS K91560 Reducing Flanges

UNS K91560 Reducing Flanges

High Pressure Steel F91 Square Flanges

High Pressure Steel F91 Square Flanges

Alloy Steel Grade F91 Flat Flange

Alloy Steel Grade F91 Flat Face Flange

Other Types Of Alloy Steel F91 Flanges

  • Chrome Moly F91 Tongue & Groove Flanges
  • Alloy Steel F91 Weld Neck Flanges
  • Alloy Steel F91 Pipe Flanges
  • CrMo F91 Forged Flanges
  • CrMo F91 Lap Joint Flanges
  • Alloy Steel F91 Socket Weld Flanges
  • Alloy Steel F91 Blind Flanges
  • ASTM A181 Alloy Steel F91 Ring Type Joint Flanges
  • Alloy Steel F91 Spectacle Blind Flanges
  • Alloy Steel Gr.F91 Plate Flanges
  • 1.4903 Reducing Flanges
  • High Pressure Steel F91 Slip On Flanges
  • Alloy Steel F91 Loose Flanges
  • Chrome Moly Gr F91 Long Weld Neck Flanges
  • UNS K91560 Threaded Flanges
  • UNS K91560 Screwed Flanges
  • 1.4903 Blind Flange
  • Alloy Steel F91 Slip on Flanges
  • CrMo F91 SORF Flanges
  • CrMo F91 SWRF Flange
  • Alloy Steel F91 Welding Neck Flange
  • ASME SA181 Alloy Steel F91 Nipoflange
  • Chrome Moly F91 Socket weld Flanges
  • Alloy Steel F91 Ring Type Joint Flanges
  • Alloy Steel F91 Spectacle Blind Flanges
  • ASME B16.5 Alloy Steel F91 BLRF Flanges
  • Alloy Steel F91 RTJ Flanges
  • High Pressure Steel Gr F91 Male & Female Flanges
  • ASTM A181 Alloy Steel Gr.F91 Flat Face Flanges
  • Chrome Moly F91 PN 10 Flange

Ask Free Sample of Alloy Steel F91 Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) Flanges Please Call On   +91 9594327775 Or Mail Us On subhash@sheetalindustries.com

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UNS K91560 Flanges Price, Dimension, Weight

Alloy Steel F91 Flanges Industrial Application

Oil & Gas Industry

Oil & Gas Industry

Chemical Industry

Chemical Industry

Power Generation Industry

Power Generation Industry

Construction Industry

Construction Industry

Shipbuilding Industry

Shipbuilding Industry

Automotive Industry

Automotive Industry

Food Industry

Food Industry

Textile Industry

Textile Industry

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