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X11CrMo9-1 Alloy Steel X11CrMo9-1 Round Bars
175.0 INR/Kilograms
Product Details:
- Processing Annealed / Normalized / Quenched & Tempered
- Specific Use High temperature and high pressure applications
- Diameter 6mm to 350mm or as specified
- Length Random, Fixed, Cut Lengths (as required)
- Grade X11CrMo9-1
- Application Power plant components, boiler and pressure vessels, steam piping, petrochemical equipment
- Material X11CrMo9-1 Alloy Steel
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X11CrMo9-1 Alloy Steel X11CrMo9-1 Round Bars Price And Quantity
- 1 Kilograms
- 175.0 INR/Kilograms
X11CrMo9-1 Alloy Steel X11CrMo9-1 Round Bars Product Specifications
- X11CrMo9-1 Alloy Steel
- X11CrMo9-1
- Power plant components, boiler and pressure vessels, steam piping, petrochemical equipment
- Hot Rolled / Forged / Cold Drawn
- Polished, Bright, Black, Peeled
- EN 10088, DIN 17460
- High temperature and high pressure applications
- H9, H10, H11 or as required
- Annealed / Normalized / Quenched & Tempered
- Round Bars
- Random, Fixed, Cut Lengths (as required)
- 6mm to 350mm or as specified
- As Rolled, Hardened & Tempered
- Good at elevated temperatures
- High tensile and yield strength
- Normalized/Tempered or as required
- Smooth, free from scale and cracks
- Standard Export Seaworthy Packing or as required
- Excellent
- Ready stock available for prompt delivery
Product Description
X11CrMo9-1 (unified European material number 1.7386) is a premium, high-alloy chrome-moly structural steel formulated specifically for extreme thermal environments.
While lower-alloy grades (like 1.7380 / Grade 22) top out around 2.25% chromium, X11CrMo9-1 features a massive 9% chromium threshold. It is classified fundamentally as a high-temperature boiler and pressure-vessel steel, engineered to maintain mechanical rigidity, scale resistance, and high creep-rupture limits at continuous service temperatures between 550C and 650C.
When sourced as round bars or forged blocks, this material is primarily used to machine high-integrity fluid-handling and structural components for aggressive power-generation and petrochemical setups.
Global Equivalents
Because this specific 9Cr-1Mo alloy chemistry is critical for multi-national pressure-retaining systems, it cross-references directly to:
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USA (ASTM / ASME): ASTM A182 Grade F9 (Forged Bars/Flanges) / A335 Grade P9 (Pipes)
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Germany (DIN / WNr): X12CrMo9-1 / 1.7386
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Russia (GOST): 13Ch9M / 139
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Japan (JIS): STBA26 / STPA26 / STFA26
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UK (BS): 3604 Grade 629
Chemical Composition (Typical %)
The low carbon content facilitates predictable heat-treatment cycles and structural stability, while the 9% Chromium payload creates an intensely stable defensive oxide boundary layer against hot atmospheric scaling.
| Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) |
| 0.08% 0.15% | 8.00% 10.00% | 0.90% 1.10% | 0.25% 1.00% | 0.30% 0.60% | 0.025% | 0.010% |
Mechanical Properties (Normalized & Tempered, +NT)
Round bars are typically supplied or heat-treated via normalizing and tempering (+NT) to achieve a highly unified, creep-resistant martensitic matrix.
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Tensile Strength ($R_m$): 590 740 MPa (N/mm)
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Yield Strength ($R_{e}$): 390 MPa
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Elongation ($A_5$): 18% (Longitudinal)
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Impact Energy (Charpy-V, 20C): 40 J
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Delivery Condition Hardness: 179 217 HBW
Critical Engineering Advantages
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High-Temperature Oxidation Resistance: Thanks to its high chromium profile, X11CrMo9-1 behaves reliably under continuous operational heating without exhibiting the catastrophic scaling or degradation standard low-alloy structural steels suffer.
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Immunity to High-Temperature Hydrogen Attack (HTHA): Under extreme refinery pressures, molecular hydrogen can penetrate basic steel structures and form destructive internal methane pockets. The 9% Cr matrix fixes carbon securely into stable complex carbides, eliminating decarburization and cracking under pressure.
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Low Thermal Expansion: Its optimized coefficient of thermal expansion limits dimensional distortion and thermal fatigue stresses during prolonged start-and-stop thermal cycling.
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Rigid Welding Guidelines: Due to its massive chromium content, this steel has strong air-hardening tendencies. Forging or welding round bars requires careful preheating ($200text{C} - 300text{C}$) followed by strict, mandatory post-weld heat treatment (PWHT) to relieve microstructural embrittlement.
Common Industrial Applications for Round Bars
X11CrMo9-1 round bars are typically converted via turning and milling into high-load components functioning alongside high-pressure steam or corrosive gases:
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Petrochemical Refineries: Valve bodies, distillation collector components, severe-service heavy-walled flanges, and high-pressure stage connectors.
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Power Plant Generation: Outlets for secondary steam superheaters, boiler header pins, and steam turbine distribution components.
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High-Heat Hardware: Specialized, creep-resistant heavy structural fasteners, studs, and thermal-mounting ties exposed directly to internal industrial furnace zones.
Versatile Applications for Reliability
X11CrMo9-1 Alloy Steel Round Bars are trusted in numerous sectors, including power generation, petrochemical processing, and high-pressure systems. Their ability to perform at elevated temperatures and under high pressure makes them a vital choice for boilers, steam pipes, and pressure vessels. Manufacturers, suppliers, and fabricators in India and globally rely on these round bars for critical engineering projects due to their robust mechanical properties and industry-standard compliance.
Exceptional Mechanical Strength and Finish Options
With high tensile and yield strength, these round bars are engineered to withstand intense mechanical stresses. They are available in multiple finishes-polished, bright, black, and peeled-and conform to close tolerances (H9, H10, H11 or as required). Users can select from random, fixed, or cut lengths as well as a variety of diameters, ensuring the perfect fit for complex assemblies and custom requirements.
Prompt Delivery and Customization
Ready stock availability ensures fast turnaround and dependable supply for urgent projects. The bars are packed with standard export seaworthy packaging or tailored upon request. Whether you need bars hot rolled, forged, cold drawn, annealed, normalized, or quenched & tempered, options are available to match your process and specification demands.
FAQ's of X11CrMo9-1 Alloy Steel X11CrMo9-1 Round Bars:
Q: How are X11CrMo9-1 Alloy Steel Round Bars typically processed for different mechanical requirements?
A: The bars can be supplied in as-rolled, hardened and tempered, annealed, or normalized conditions. Tailored heat treatment processes such as quenching and tempering or normalizing can be applied to meet project-specific mechanical requirements, ensuring optimal performance under high temperatures and pressures.Q: What makes X11CrMo9-1 round bars suitable for use in power plants and petrochemical industries?
A: These bars are engineered with high tensile and yield strength and possess excellent corrosion resistance even at elevated temperatures. Their stability, mechanical robustness, and ability to retain integrity under high pressure make them ideal for critical applications in power plants, pressure vessels, boilers, steam piping, and petrochemical processing equipment.Q: When is it recommended to use a polished or peeled finish on X11CrMo9-1 Alloy Steel Round Bars?
A: A polished or peeled finish is recommended when the application demands a smooth surface, improved aesthetic appeal, or reduced risk of surface defects. These finishes may also enhance corrosion resistance and are preferred in environments with stringent safety or cleanliness requirements.Q: Where are these round bars manufactured and supplied from?
A: X11CrMo9-1 Alloy Steel Round Bars are manufactured, stocked, and exported by suppliers, dealers, and manufacturers in India. They are supplied worldwide to industries requiring high-performance steel bars for specialized technical applications.Q: What are the typical dimensional and tolerance options for these round bars?
A: Diameters are available from 6mm to 350mm, with length options including random, fixed, or cut lengths as specified. Tolerances are maintained at H9, H10, H11, or as per customer requirements, ensuring dimensional accuracy for seamless assembly and installation.Q: How does the excellent machinability of X11CrMo9-1 Alloy Steel benefit end users?
A: Excellent machinability means the bars can be easily shaped, cut, or finished to precise specifications with minimal tool wear and efficient production rates, translating to reduced manufacturing time, cost savings, and greater consistency in finished components.Q: What kind of packaging is used, and how quickly can orders be fulfilled?
A: Standard export seaworthy packaging ensures protection during transit, while custom packaging arrangements can be made if requested. With ready stock available, orders are often dispatched promptly to meet urgent project timelines.Tell us about your requirement
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