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ASTM A335 Grade P11 Alloy Steel Round Bars
110.0 INR/Kilograms
Product Details:
- Length 3 to 6 meters (custom lengths on request)
- Diameter 8 mm to 350 mm
- Grade P11
- Standard ASTM A335
- Application High-temperature services, boilers, heat exchangers, oil & gas, petrochemical industries
- Technique Hot Rolled / Forged
- Finish Black, Bright, Polished
- Click to view more
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ASTM A335 Grade P11 Alloy Steel Round Bars Price And Quantity
- 1000 Kilograms
- 110.0 INR/Kilograms
ASTM A335 Grade P11 Alloy Steel Round Bars Product Specifications
- 8 mm to 350 mm
- P11
- ASTM A335 Grade P11 Alloy Steel
- ASTM A335
- Round Bars
- Annealed, Normalized, Quenched and Tempered
- 3 to 6 meters (custom lengths on request)
- Hot Rolled / Forged
- Black, Bright, Polished
- H8, H9, H10, H11, H12, K9 or as specified
- High-temperature services, boilers, heat exchangers, oil & gas, petrochemical industries
- Pressure vessel and high-temperature piping applications
- 143 - 197 HB (Brinell)
- Plain, Beveled, Threaded
- 20 (minimum)
- 415 MPa
- Normalized and Tempered
- 205 MPa
- Fully Annealed / Normalized / Hardened & Tempered
- As per ASTM standards
- Seamless / Forged
- Peeled, Polished, Turned, Ground
- Good, suitable for high-temperature environments
- 7.85 g/cm3
Product Description
Technical Overview
ASTM A335 P11 (often called 1.25 Chrome 0.5 Moly) is a low-alloy steel used for high-temperature service. It is highly valued in industrial piping and bar form for its excellent tensile strength and resistance to hydrogen attack and corrosion.
Key Specifications & Properties
| Feature | Details |
| Material Grade | ASTM A335 P11 / ASME SA335 P11 |
| Chemical Composition | Chromium (1.00% 1.50%), Molybdenum (0.44% 0.65%) |
| Tensile Strength | $ge 415 text{ MPa}$ ($60,000 text{ psi}$) |
| Yield Strength | $ge 205 text{ MPa}$ ($30,000 text{ psi}$) |
| Standard | ASTM A335, ASME SA335 |
Common Applications
These round bars are preferred in high-heat environments where structural integrity is critical:
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Power Plants: Boiler parts, steam headers, and turbine components.
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Oil & Gas: High-temperature piping and refinery equipment.
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Chemical Processing: Heat exchangers and pressure vessels.
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Industrial Manufacturing: Forged fittings and heavy-duty fasteners.
Features to Highlight in Your Listing
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High Temperature Stability: Designed to perform in temperatures exceeding 500C.
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Corrosion Resistance: Chromium content provides a protective layer against oxidation.
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Versatile Finish: Available in Hot Rolled, Cold Drawn, or Forged conditions.
Superior Strength and Durability
ASTM A335 P11 Alloy Steel Round Bars are engineered to deliver both toughness and longevity under high-temperature operations. With a minimum elongation of 20% and adherence to strict ASTM standards, their resilience and reliability make them indispensable for demanding engineering sectors.
Versatile Manufacturing Processes
Produced through seamless or forged techniques, these round bars cater to diverse industrial, structural, and mechanical requirements. The hot-rolled and forged options ensure homogeneous material properties while customization in length, diameter, and end condition supports project-specific needs.
Ideal for High-Temperature Applications
Featuring excellent corrosion resistance and robust heat treatment options, Grade P11 alloy steel bars perform exceptionally in environments like boilers, heat exchangers, and oil & gas infrastructures. Their design supports both standard and custom applications requiring consistent reliability under thermal stress.
FAQ's of ASTM A335 Grade P11 Alloy Steel Round Bars:
Q: How are ASTM A335 Grade P11 Alloy Steel Round Bars manufactured?
A: These round bars are produced using seamless or forged processes. Seamless bars are made by piercing a solid billet, while forged bars are formed by shaping steel under high pressure. Both methods promote consistent material properties and structural integrity, essential for high-pressure and high-temperature uses.Q: What are the typical applications for Grade P11 alloy steel round bars?
A: P11 alloy steel round bars are widely used in high-temperature services such as boilers, heat exchangers, pressure vessels, and piping systems in oil & gas, petrochemical, and power generation industries due to their strength and resistance to thermal stress and corrosion.Q: When should I use a specific surface finish like peeled, polished, turned, or ground?
A: The choice of surface finish depends on application requirements. Polished or ground finishes are ideal for aesthetic or precision needs, while peeled and turned surfaces suit general industrial purposes. Selecting the right finish helps optimize wear resistance, appearance, and fit in assemblies.Q: Where can I source ASTM A335 Grade P11 Alloy Steel Round Bars in India?
A: These bars are available through dealers, exporters, manufacturers, fabricators, retailers, suppliers, and traders across India. Custom orders can be placed for specific lengths, diameters, finishes, and end conditions according to project specifications.Q: What heat treatment processes are available for these alloy steel bars?
A: ASTM A335 Grade P11 bars are supplied in various heat treatments, including fully annealed, normalized, and hardened & tempered. The appropriate process is selected based on the desired mechanical properties and the end-use environment.Q: How does the specified hardness (143 - 197 HB) benefit performance?
A: The controlled Brinell hardness ensures the round bars have an optimal balance of strength and ductility, enhancing resistance to deformation and wear during service in high-pressure and high-temperature environments.Q: What are the advantages of using these round bars in high-temperature applications?
A: ASTM A335 Grade P11 round bars offer high mechanical strength, good corrosion resistance, stable performance under thermal cycling, and durability, making them highly suited for demanding applications where reliability and safety are paramount.Tell us about your requirement
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