Alloy Steel F91 bars are high-strength, heat-resistant steel bars made up of chromium, molybdenum, and vanadium alloy steels that boast exceptional mechanical properties as well as resistance against corrosion and oxidation at elevated temperatures. Their designation within ASTM A182 represents their specific grade. F91 pipe flanges, fittings, valves and parts designed specifically for high temperature service.

Alloy Steel F91 bars stand out with their exceptional tensile strength and toughness, making them suitable for applications in demanding environments such as power generation, chemical processing, oil and gas industries, etc. Their inclusion of chromium increases corrosion resistance while molybdenum improves their ability to withstand high temperatures as well as providing excellent creep strength; additionally vanadium adds hardenability as part of this alloy material.

 Alloy Steel Grade F91 Bars

These bars are widely utilized in the creation of various components exposed to extreme temperatures and pressure conditions, including valves, fittings, flanges and piping systems in power plants, refineries and petrochemical plants. Their superior heat resistance makes them particularly suitable for steam turbines and boilers where reliability and durability are of utmost importance.

Alloy Steel F91 bars boast superior machinability and weldability for simple fabrication and assembly of complex structures and components, with ease. Their versatile nature and high performance characteristics make Alloy Steel F91 bars popular choices among engineers and manufacturers looking for materials capable of withstanding extreme operating conditions while upholding structural integrity and dimension stability.

Alloy Steel F91 bars not only boast excellent mechanical properties, but are also cost-effective compared to other high-performance alloys - creating an appealing balance between performance and affordability. They make Alloy Steel F91 bars suitable for various industrial applications where cost considerations play a critical part when selecting material options.

Apple Steels is a Leading manufacturer and supplier of Alloy Steel F91 Bars in Mumbai, India. As we stand committed to excellence and have state-of-the-art facilities and skilled workforce supporting production processes we ensure stringent quality controls at each step. Our F91 Bars offer incredible strength, durability and resistance against corrosion - ideal products to use across various industrial applications. With stringent quality measures being in place at each step we ensure consistent products being shipped worldwide.

Manufacturing Process Of Alloy Steel Grade F91 Bars

Casting

Melting and Casting

Steel and alloying metals are loaded into an electric arc furnace. Once in the furnace, the metal is heated to a specific temperature above its melting point, usually in excess of 2800°F.

Forming Round Bar

Forming

Most cast steel is formed by hot rolling—the slab, bloom, or billet is heated and passed through large rollers, stretching out the steel into a longer, thinner form.

Heat Treatment

Heat treatment

Heat treatment strengthens rolled Inconel by recrystallizing the deformed microstructure. Most Inconel is heat treated by annealing.

Descaling

Descaling

A rolled piece of Inconel acquires a layer of oxidized “mill scale,” which needs to be washed away to restore a shiny surface finish.

Cutting Round Bar

Cutting or Machining

Inconel is cut to a specified shape and size. The Inconel can be sheared with circular knives, sawed with high-speed blades, or blanked with punches.

Specification Of Alloy Steel Grade F91 Rods

Standards : ASTM B425 / ASME SB425
Dimensions : EN, DIN, JIS, ASTM, BS, ASME, AISI
Wire : Thickness starting from 0.05mm
Round bar size : Diameter: 3-~800mm
Hex Bar size : 2-100mm A/F
Flat bar size : Thickness: 2 -100mm / Width: 10 to 500mm
Square bar size : 4 to 100mm
Rectangular Bars Size : 33 x 30mm to 295 x 1066mm
Hollow Bar : 32mm OD x 16mm ID to 250mm OD x 200mm ID
Tolerance : H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements
Finish : Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish

Types Of Alloy Steel Grade F91 Bars, Round Bars

 Inconel Round Bar

Round Bar

 Inconel Hex Bar

Hexagonal Bar

 Inconel Square Bar

Square Bar

Other Types Of Alloy Steel Grade F91 Rods

  • Alloy Steel Grade F91 Precision Round Bars
  • Alloy Steel Grade F91 Polished Bar
  • UNS K90901 Bright Round Bars
  • Alloy Steel Grade F91 Hot Rolled Bar
  • ASTM B182 Alloy Steel Grade F91 Forged Bar
  • UNS K90901 Round Bar
  • Alloy Steel Grade F91 Cold Drawn Bar
  • Alloy Steel Grade F91 Forged Bar
  • Alloy Steel Grade F91 Rectangular Bar

Alloy Steel Grade F91 Bars Equivalent Grades

STANDARD UNS WERKSTOFF NR. Trade Name
Alloy Steel F91 K90901 1.4903 9Cr-1Mo-V

Chemical Composition of Alloy Steel Grade F91 Bars

Grade C Mn Si P S Cr Mo
Alloy Steel F91 0.08 - 0.12 0.3 - 0.6 0.5 0.01 0.02 8.5 - 9.5 0.85 - 1.05

Mechanical Properties of Alloy Steel Grade F91 Bars

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

Alloy Steel Grade F91 Bars Technical Information

Alloy Steel Grade F91 Rods Industrial Application

Electrical Industry

Automotive Industry

Construction Industry

Defence Industry

Pharmaceutical Industry

Petroleum Industry

Petrochemical Industry

Milk & Dairy Industry

Export & Supply Destination of Alloy Steel Grade F91 Bars

Austria, Azerbaijan, Belarus, Belgium, Bulgaria, Croatia, Cyprus, Czechia/Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Netherlands, Norway, Poland, Portugal, Romania, Russia, Serbia, Slovakia, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom.

Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, British, China, Egypt, Hong Kong, India, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kuwait, Kyrgyzstan, Lebanon, Macau, Malaysia, Maldives, Mongolia, Myanmar, Nepal, North Korea, Oman, Philippines, Qatar, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Taiwan, Thailand, Turkey, United Arab Emirates, Vietnam.

Algeria, Angola, Botswana, Burkina Faso, Burundi, Cameroon, Central African Republic, Egypt, Eswatini, Ethiopia, Gambia, Kenya, Liberia, Libya, Madagascar, Mauritania, Mauritius, Morocco, Mozambique, Namibia, Niger, Nigeria, Rwanda, Senegal, Seychelles, South Africa, Tanzania, Tunisia, Uganda, Zambia, Zimbabwe.

Antigua and Barbuda, Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, United States of America, Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.