High Quality Alloy Steel F5 Round Bars & Rods

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Alloy Steel Grade F5 Explained

Alloy Steel Grade F5 is a chromium-molybdenum alloy steel developed for elevated-temperature applications. With improved oxidation resistance and higher strength than lower-alloy grades, F5 is widely used in petrochemical plants, refineries, and power stations. It performs well under cyclic thermal conditions and high-pressure service, making it ideal for piping, valves, and pressure-retaining components exposed to continuous heat and stress.

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Other Types of Alloy Steel F5 Bars

  • Square alloy steel bars for elevated temperature and pressure service
  • Grade: Alloy Steel F5 / UNS K41545
  • Manufactured as per ASTM A182 specifications
  • Used in refineries, boilers, and power plant systems
  • Hexagonal alloy steel bars ideal for fasteners and bolting
  • ASTM A182 Alloy Steel F5 grade material
  • Available in hot rolled, bright drawn, and polished finishes
  • Commonly used in refinery piping and pressure equipment
  • Rectangular alloy steel bars for fabrication and structural components
  • Material standard: ASTM A182 Alloy Steel F5
  • Equivalent to DIN 1.7362 material grade
  • Used in power generation and petrochemical plants
  • Flat alloy steel bars with improved heat and oxidation resistance
  • Produced in compliance with ASTM A182 F5
  • Supplied in hot rolled and machined conditions
  • Suitable for boilers, supports, and pressure parts
  • Bright finished alloy steel bars with precise dimensional control
  • Ideal for machining, threading, and precision components
  • Manufactured as per ASTM A182 Alloy Steel F5
  • Used in valves, studs, and high-temperature assemblies
  • Forged alloy steel bars for high-temperature and pressure service
  • Grade: Alloy Steel F5 as per ASTM A182
  • Excellent strength, creep resistance, and durability
  • Used in refineries, power plants, and heavy engineering

ALLOY STEEL F5 ROUND BAR EQUIVALENT GRADES

STANDARD UNS WERKSTOFF NR.
Alloy Steel F5 K41545 1.7362

SPECIFICATION OF ALLOY STEEL F5 ROUND BAR

Product Standard ASTM A182 / ASME SA182
Dimension Standard EN, DIN, JIS, ASTM, BS, ASME, AISI
Size 14 mm – 300 mm
Length 1 to 6 meters, Custom Cut Length
Form Round, Square, Hex (AF), Rectangle, Billet, Ingot, Forging

CHEMICAL COMPOSITION OF ALLOY STEEL F5 ROUND BAR

Grade C Mn P S Si Ni Cr Mo Cb
F5 0.25 max 0.60 max 0.040 max 0.030 max 0.50 max 0.50 max 4.0 – 6.0 0.44 – 0.65

MECHANICAL PROPERTIES OF ALLOY STEEL F5 ROUND BAR

Grade Tensile Strength (MPa) min 0.2% Yield Strength (MPa) min Elongation (% in 50mm) min Rockwell B (HRB) max Brinell (HB) max
F5 485 275 20 143 – 217

💡 Practical Difference in Use

Use Alloy Steel Grade F5 Round Bars when: higher temperature strength and improved oxidation resistance are required compared to lower chromium grades. Alloy Steel F5 is a chromium-molybdenum alloy steel designed for elevated-temperature and pressure applications, offering reliable performance under thermal stress and cyclic loading. → Example: refinery piping, high-temperature headers, pressure vessels, boilers, and petrochemical processing equipment.


Bright Finished / Machined Alloy Steel F5 Round Bars when: precise dimensional control, smooth surface finish, and enhanced machinability are essential for critical pressure components. Bright bars ensure consistent quality and accuracy in fabrication. → Example: valve bodies, studs, bolts, flanges, shafts, and precision-machined refinery components.

Applications of Alloy Steel Grade F5 Round Bars

Alloy Steel F5 round bars are widely used in high-temperature service environments where strength, oxidation resistance, and long-term durability are essential.

  • Petrochemical & Refining: High-temperature piping, pressure vessels.
  • Power Generation: Boilers, headers, steam lines.
  • Process Industries: Heat-resistant mechanical components.

When to Choose Alloy Steel Grade F5 Round Bars?

Selection depends on operating temperature, pressure severity, oxidation resistance requirements, and fabrication precision.

Choose Alloy Steel F5 Round Bars when:

  • Higher temperature strength than F1/F2 grades is required
  • Resistance to oxidation and thermal fatigue is needed
  • Components operate under sustained heat and pressure
  • Reliable weldability and mechanical stability are important
  • Used in refinery and petrochemical environments
  • Long service life under thermal stress is required

Bright / Machined Alloy Steel F5 Round Bars are preferred when:

  • Tight dimensional tolerances are critical
  • Smooth surface finish is required
  • Precision machining or threading is involved
  • Uniform strength and performance are necessary
  • Used in valves, fasteners, and fittings
  • Applied in pressure-retaining components

Industries That Use Alloy Steel Grade F5 Round Bars

Alloy Steel F5 is widely adopted in industries requiring dependable high-temperature and pressure performance.

Petrochemical & Refining Industry

Used in high-temperature and pressure processing units.

Uses

Piping systems, pressure vessels, valves.

Why Alloy Steel F5?

Excellent oxidation resistance and thermal strength.

Power Generation Industry

Used in steam and heat-transfer systems.

Uses

Boilers, headers, steam piping.

Why Alloy Steel F5?

Reliable performance under continuous high-temperature operation.

Heavy Engineering & Fabrication

Used in heat-resistant engineered components.

Uses

Structural and mechanical assemblies.

Why Alloy Steel F5?

Durability and stability in demanding industrial conditions.

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