ASTM A182 F9 is a specification that covers forged or rolled alloy steel bars, including hot-finished or cold-finished bars, for use in high-temperature and corrosive service. Alloy steel refers to a type of steel that contains a variety of alloying elements, such as chromium, molybdenum, and vanadium, to enhance its properties. F9 alloy steel, specifically, is known for its excellent high-temperature strength and corrosion resistance.
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High-Temperature Strength: One of the primary advantages of ASTM A182 F9 alloy steel bars is their exceptional strength at elevated temperatures. This property makes them well-suited for applications in high-temperature environments, such as those encountered in power generation and industrial processes.
Corrosion Resistance: The presence of alloying elements, particularly chromium, contributes to the corrosion resistance of F9 alloy steel. This property is crucial in environments where exposure to corrosive substances is a concern, such as in chemical processing plants.
Versatility: ASTM A182 F9 alloy steel bars are versatile and can be used in a variety of applications across different industries. Their adaptability stems from the combination of high-temperature strength and corrosion resistance, allowing them to perform well in diverse operating conditions.
Machinability: Depending on the heat treatment, F9 alloy steel bars can exhibit good machinability, facilitating the manufacturing of complex components with precision.
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Specifications | ASTM A182, ASME SA182 |
Dimension Standard | EN, DIN, JIS, ASTM, BS, ASME, AISI |
Bar 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. Thickness: 3.0 to 12.0mm. |
Hollow Bars | 32mm OD x 16mm ID to 250mm OD x 200mm ID) |
Billet Size | 1/2 to 495mm Diameter |
Finish | Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black |
Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients requirements |
Bar Surface | Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline |
Rolled Bars Condition | Hardened & tempered, annealed |
Cold Rolled Bar Technique | Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar, Rod |
Form | Round, Rod, T-Bar, Channel Bar, Precision Ground Bar, Flat Bar, Square, Blocks, Round Rod, Rings, Hollow, Triangle, Rectangle, Hex (A/F), Threaded, Half Round Bar, Profiles, Billet, Ingot, I/H Bar, Forging etc. |
Melting
The first step in the process is melting raw materials in an electric furnace. These raw materials are typically iron ore, chromium, nickel, and other elements in exact amounts.
Hot Rolling
After being heated, the billets are shaped into long, thin rods by going through a series of rolling mills. Because the metal is heated above its recrystallization temperature during this operation, it is known as hot rolling.
Pickling
The pickling process is used to the bars in order to eliminate any oxide, scale, or other surface contaminants. Usually, an acid solution is used for this.
Cutting
Lastly, shearing machines or other cutting techniques are used to cut the rods to the required length.
STANDARD | UNS | WNR. | TRADE NAME |
ASTM A182 F9 | K90941 | 1.7386 | 9Cr-1Mo |
The chemical composition of ASTM A182 F9 alloy steel bars typically includes elements such as chromium, molybdenum, and sometimes vanadium. The presence of these alloying elements contributes to the enhanced mechanical and corrosion-resistant properties of the steel.
Grade | C | Mn | Si | P | S | Cr | Mo |
Alloy Steel F9 | 0.15 Max | 0.30-0.6 | 0.5 - 1 | 0.03 | 0.03 | 8 - 10 | 0.9 - 1.1 |
ASTM A182 F5 alloy steel bars are designed to meet specific mechanical property requirements. The standard specifies minimum tensile strength, yield strength, and elongation values, ensuring the material's reliability and performance under high-stress conditions.
Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (MPa) min |
Alloy Steel F9 | 380 | 20 | 585 |
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Oil and Gas Industry: ASTM A182 F9 alloy steel bars find extensive use in the oil and gas industry, particularly in applications such as high-pressure piping, valves, and fittings. The alloy's resistance to corrosion and high-temperature strength make it suitable for harsh operating conditions.
Power Generation: Power plants often utilize ASTM A182 F9 alloy steel bars for components like turbine blades, steam lines, and boiler tubes. The alloy's ability to withstand elevated temperatures and its corrosion resistance make it a reliable choice in power generation applications.
Chemical Processing: In chemical processing plants, where exposure to corrosive substances is common, F9 alloy steel bars are employed in equipment like reactors, heat exchangers, and chemical storage tanks. The alloy's resistance to corrosion is crucial in maintaining the integrity of these components.
Aerospace Industry: Certain aerospace applications benefit from the use of ASTM A182 F9 alloy steel bars due to their high strength-to-weight ratio and resistance to heat. Components like aircraft engine parts, landing gear, and structural elements may incorporate F9 alloy steel.
Oil & Gas
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Power Plant Generation
Petrochemical Industry
Marine
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Aerospace
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Chemical
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Pharmaceuticals Industry
Cement
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