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Alloy Steel PWA 36140 (Pratt & Whitney) Bars / PWA 36140 Rods / PWA 36140 Rings
1215.0 INR/Kilograms
Product Details:
- Type Bars, Rods, Rings
- Specific Use Pratt & Whitney Engine and Aerospace Applications
- Diameter 10 mm to 300 mm or custom as required
- Grade PWA 36140
- Finish Bright, Ground, Polished or as specified
- Processing Heat Treated, Solution Annealed
- Material Alloy Steel PWA 36140 (Pratt & Whitney)
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Alloy Steel PWA 36140 (Pratt & Whitney) Bars / PWA 36140 Rods / PWA 36140 Rings Price And Quantity
- 1000 Kilograms
- 1215.0 INR/Kilograms
Alloy Steel PWA 36140 (Pratt & Whitney) Bars / PWA 36140 Rods / PWA 36140 Rings Product Specifications
- Aerospace, Jet Engine Components, Turbine Parts, High-Temperature Assemblies
- PWA 36140
- Alloy Steel PWA 36140 (Pratt & Whitney)
- Heat Treated, Solution Annealed
- Forged, Rolled, or Precision Machined
- Custom Lengths as per Requirement
- Tight Tolerances, as per Specification or Drawing
- 10 mm to 300 mm or custom as required
- PWA 36140
- Bright, Ground, Polished or as specified
- Bars, Rods, Rings
- Pratt & Whitney Engine and Aerospace Applications
- >1100 MPa (depends on size/condition)
- Ultrasonic, MPI, Dimensional as per specification
- Scale Free, Ultrasonic Tested
- Normalized and Tempered, Solution Annealed, Aging (if required)
- Export worthy wooden boxes, bundles with end caps, or as specified
- Good for high-temp environments, but not stainless
- >900 MPa (varies with heat treatment)
- 7.8 g/cm3 (typical for alloy steels)
- Typically 28-36 HRC or as per customer requirement
- 12-16% (in 2 inches, depending on processing)
Product Description
PWA 36140 is a high-performance aerospace material specification from Pratt & Whitney, primarily identifying a carburizing bearing and gear steel known commercially as M50 NiL (or CBS-50 NiL).
Unlike standard M50 through-hardened steel, PWA 36140 is designed to be carburized, providing a hard, wear-resistant surface (case) while maintaining a high-toughness core. This makes it ideal for critical aircraft engine components that face both high-stress rolling contact and potential impact.
1. Core Material Equivalents
PWA 36140 is effectively the Pratt & Whitney equivalent of several other high-end aerospace and industry standards:
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AMS Specification: AMS 6278
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UNS Number: UNS K91231
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Commercial Name: M50 NiL / CBS-50 NiL
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Other OEM Equivalents: * GE: B50TF347 (formerly B50TF211)
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Rolls Royce: MSRR 6113
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SKF: MS-229
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2. Chemical Composition (Nominal %)
The "NiL" stands for Nickel-Low Carbon, which distinguishes it from standard M50. The low carbon content allows for superior fracture toughness in the core after carburizing.
| Element | Composition (%) |
| Carbon (C) | 0.11 0.15 |
| Manganese (Mn) | 0.15 0.35 |
| Silicon (Si) | 0.10 0.25 |
| Chromium (Cr) | 4.00 4.25 |
| Nickel (Ni) | 3.20 3.60 |
| Molybdenum (Mo) | 4.00 4.50 |
| Vanadium (V) | 1.10 1.30 |
3. Key Technical Properties
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Melt Type: Typically produced via VIM-VAR (Vacuum Induction Melting followed by Vacuum Arc Remelting) for extreme cleanliness and fatigue resistance.
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Service Temperature: Maintains strength and stability up to approximately 316C (600F).
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Core Toughness: Unlike standard M50, which can be brittle, PWA 36140 has high fracture toughness ($>40 text{ ksi}sqrt{text{in}}$), making it resistant to catastrophic failure if a crack initiates.
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Case Hardness: When carburized and heat treated, the surface achieves a hardness of 60-64 HRC, comparable to tool steels.
4. Available Product Forms
As an aerospace-grade material, it is strictly controlled and supplied in the following forms for further machining or forging:
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Round Bars / Rods: Used for machining engine bearings, shafts, and fasteners.
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Rings: Often supplied as forged rings for bearing races and gear blanks.
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Billets: For large-scale forging operations.
5. Applications
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Main Shaft Bearings: The primary application in jet engines.
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High-Performance Gears: Where high surface fatigue life and core shock resistance are required.
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Aerospace Fasteners: Critical bolts subjected to high temperatures and loads.
Engineered for Demanding Aerospace Applications
PWA 36140 alloy steel is designed for use in high-stress, high-temperature aerospace and jet engine components. Its stringent chemical composition and mechanical properties ensure outstanding performance and reliability. Each product undergoes rigorous quality controls-including ultrasonic, magnetic particle, and dimensional inspections-to meet precise aerospace standards.
Advanced Heat Treatment and Processing
These bars, rods, and rings are processed using normalization, tempering, solution annealing, and, if needed, aging. Such treatments optimize mechanical strength, hardness, and ductility, meeting application-specific requirements for yield and tensile strength. The resulting products are highly stable, with excellent machinability and tight dimensional tolerances.
Superior Surface Condition and Packaging
Finished to a scale-free state and offered in bright, ground, or polished options, these components meet exact aesthetic or functional needs. Packaging is export-worthy-protecting materials during global transportation. Wooden boxes, capped bundles, or customer-specified solutions are available to guarantee uncompromised product quality upon delivery.
FAQ's of Alloy Steel PWA 36140 (Pratt & Whitney) Bars / PWA 36140 Rods / PWA 36140 Rings:
Q: How are Alloy Steel PWA 36140 Bars, Rods, and Rings tested for quality assurance?
A: These products undergo comprehensive ultrasonic, magnetic particle (MPI), and dimensional inspections in accordance with Pratt & Whitney and aerospace industry standards. Such testing ensures reliable material integrity, surface condition, and adherence to tight tolerances required for high-performance applications.Q: What processing steps are involved in manufacturing PWA 36140 Bars, Rods, and Rings?
A: Manufacturing includes forging, rolling, or precision machining, followed by advanced heat treatments such as normalization, tempering, and solution annealing. If necessary, aging is performed to enhance mechanical properties, resulting in superior strength, ductility, and microstructural stability.Q: When should customers specify custom dimensions or finishes for their order?
A: Customers are encouraged to specify custom lengths, diameters (10 mm to 300 mm), tolerances, and finishes (bright, ground, polished) at the time of order placement. This ensures the components meet exact project requirements for aerospace, jet engines, or turbine assemblies.Q: Where are Alloy Steel PWA 36140 products typically used?
A: These products are primarily utilized in aerospace and jet engine manufacturing, especially in Pratt & Whitney engines, turbine components, and other assemblies that demand superior mechanical performance at elevated temperatures.Q: What benefits does PWA 36140 alloy steel provide in high-temperature environments?
A: PWA 36140 alloy steel offers excellent strength retention, good corrosion resistance in high-temperature conditions (though it is not stainless), and stable performance under thermal cycling, making it ideal for demanding aerospace and engine applications.Q: How does the surface condition of these products impact their usage?
A: A scale-free surface-available in bright, ground, or polished finishes-reduces the risk of contaminants, supports critical fitment, and simplifies post-processing or assembly, making it suitable for aerospace components with stringent surface requirements.Tell us about your requirement
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