Chung Metal Manufacturer & Suppliers in Da Nang offers Alloy Steel F91 Bars and Rods, ultra‑supercritical power plants, petrochemical, and boiler use high‑strength, creep‑resistant ferritic‑martensitic steel. F91 is in growing demand for high pressure, high temperature service because it has better creep strength and oxidation resistance. Our normalized and tempered F91 bars are made with precise control of chemistry and microstructure. Our customers in the thermal power, steam turbine, and furnace sectors rely on our stock of F91 for key fast-failing parts. We have a range of sizes, surface finishes, and certificates to fulfill strict operating conditions.
Alloy Steel F91 (UNS K90901, ASTM A182 F91 etc.) is normally of ~0.08‑0.12% carbon; ~8.5‑9.5% chromium; ~0.85‑1.05% molybdenum; vanadium ~0.18‑0.25%; niobium (columbium) ~0.06‑0.10%; manganese, silicon in moderate quantities, P,S very small. Mechanical properties: tensile strength of over ~620 MPa (≈90 ksi), yield ~415 MPa (≈60 ksi), elongation at least ~20%, with high reduction of area. The steel possesses high hardness (after tempering), good creep resistance up to around 600‑650°C, good thermal fatigue strength, and oxidation resistance.
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type |
Alloy Steel ASTM A182 F91 Round Bars |
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Type |
rod, square bar, Round bar, hexagon bar, flat bar, channel bar, angle bar, threaded bar |
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Standards |
Alloy Steel ASTM A182 F91 , A479, A314, GB4226-84, GB/T1220-2007, JISG4311-91, JIS G4318-98, EN 10095-99, GB4226-84, EN10088-3-2005, JIS G3033-2005, etc |
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Surface |
bright round bar, pickled round bar, black round bar |
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Package Details |
Standard seaworthy package(wooden boxes package,pvc package, or other package) |
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Technique |
Forged/Hot Rolled/Cold Drawn/Peeled |
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Range |
Range – 3.17mm to 350mm dia |
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Diameter |
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Length |
1m-9m or according to the customer’s requirement |
| Grade | C | Mn | Si | Mo | P | Cr |
| ASTM A182 F91 | 0.08 – 0.15 | 0.30 – 0.60 | 0.20 – 0.50 | 0.85 – 1.05 | 0.020 | 8.0 – 9.5 |
| Tensile Strength (ksi) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (ksi) min |
| 570 | 23 | 295 |
| STANDARD | WERKSTOFF NR. | UNS |
| ASTM A182 F91 | 1.4903 | – |
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SHAPE |
POUNDS PER FOOT |
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Round |
D2 x 2.67 |
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Hexagon |
D2 x 2.945 |
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Square |
D2 x 3.4 |
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Flat |
Thickness (in.) x Width (in.) x 3.4 |
Alloy Steel F91 Bars and Rods are primarily used in high-temperature and high-pressure applications such as power plants, pressure vessels, and heat exchangers due to their strength and resistance to oxidation.
Alloy Steel F91 offers excellent tensile strength, high-temperature resistance, and good oxidation and corrosion resistance, making it ideal for demanding industrial applications.
F91 Bars/Rods are employed for parts in ultra‑supercritical and supercritical boiler tubes, re‑heater and superheater systems, steam piping, headers, and high‑temperature fasteners. Also in petrochemical reformers, heat exchangers, and furnace parts where creep issues at higher temperatures are relevant. Employed to weld assemblies that need to withstand cyclic thermal stresses. In power plants extending efficiency through higher steam parameters, F91 offers improved durability. Also used in power generation, refining, and petrochemical applications where materials are under stress at high temperature for extended periods.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chung Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Da Nang, Vietnam
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