Nickel Alloy Seamless Pipes ASTM B622 Haynes 230 Seamless Pipes UNS N06230

Nickel Alloy Seamless Pipes ASTM B622 Haynes 230 Seamless Pipes UNS N06230

Haynes 230 is a nickel-chromium-tungsten-molybdenum alloy that offers an exceptional combination of high-temperature strength, oxidation resistance, and thermal stability. Seamless pipes made from Haynes 230 are widely used in demanding applications, particularly in environments involving extreme temperatures and corrosive conditions. Below is a detailed description of Haynes 230 seamless pipes:

1. Composition

Haynes 230 is a nickel-based superalloy with the following key alloying elements:

Nickel (Ni): ~47% (provides excellent corrosion resistance and high-temperature strength)

Chromium (Cr): ~22% (enhances oxidation and corrosion resistance)

Tungsten (W): ~14% (improves high-temperature strength and creep resistance)

Molybdenum (Mo): ~2% (adds strength and corrosion resistance)

Iron (Fe): ~3% (minor component for structural stability)

Manganese (Mn): ~0.5% (improves hot workability)

Silicon (Si): ~0.4% (enhances oxidation resistance)

Aluminum (Al): ~0.3% (improves oxidation resistance)

Carbon (C): ~0.1% (strengthens the alloy)

Lanthanum (La): ~0.02% (enhances oxidation resistance and thermal stability)

2. Key Properties

Haynes 230 seamless pipes exhibit the following properties:

High-Temperature Strength: Retains excellent mechanical properties at temperatures up to 2100°F (1150°C).

Oxidation Resistance: Superior resistance to oxidation and scaling in high-temperature environments.

Thermal Stability: Maintains structural integrity under prolonged exposure to high temperatures.

Corrosion Resistance: Resists corrosion in both oxidizing and reducing atmospheres.

Creep Resistance: Excellent resistance to deformation under stress at high temperatures.

Fabricability: Can be easily welded, formed, and machined into seamless pipes.

3. Applications

Haynes 230 seamless pipes are used in industries and applications where high-temperature performance and corrosion resistance are critical. Common applications include:

Aerospace: Combustion liners, transition ducts, and afterburner components.

Power Generation: Gas turbine components, heat exchangers, and combustors.

Chemical Processing: High-temperature reactors, furnace components, and piping systems.

Heat Treatment: Furnace fixtures and radiant tubes.

Industrial Gas Turbines: Combustion cans and transition pieces.

4. Advantages of Seamless Pipes

Uniform Structure: Seamless pipes have no welded joints, ensuring consistent mechanical properties and reliability.

High Pressure Resistance: Ideal for high-pressure applications due to their robust construction.

Smooth Surface: The absence of seams reduces the risk of corrosion and improves fluid flow efficiency.

Customizability: Available in various sizes, thicknesses, and lengths to meet specific requirements.

5. Standards and Specifications

Haynes 230 seamless pipes are manufactured to meet industry standards, including:

ASTM B622: Standard specification for seamless nickel and nickel-cobalt alloy pipes.

ASME SB-622: Equivalent to ASTM B622 for use in pressure vessel applications.

AMS 5878: Aerospace material specification for Haynes 230 alloy.

6. Manufacturing Process

Haynes 230 seamless pipes are produced through the following steps:

Melting: Raw materials are melted in a vacuum induction furnace to achieve precise chemical composition.

Forming: The molten alloy is cast into billets, which are then hot extruded or pilgered to form seamless pipes.

Heat Treatment: The pipes undergo solution annealing to optimize mechanical properties and microstructure.

Finishing: Pipes are cleaned, polished, and inspected to ensure dimensional accuracy and surface quality.

7. Quality Assurance

Haynes 230 seamless pipes undergo rigorous testing to ensure compliance with industry standards, including:

Chemical Analysis: Verifies alloy composition.

Mechanical Testing: Evaluates tensile strength, yield strength, and elongation.

Non-Destructive Testing (NDT): Includes ultrasonic testing (UT) and dye penetrant inspection (DPI) to detect surface and internal defects.

Dimensional Inspection: Ensures pipes meet specified tolerances.

Haynes 230 seamless pipes are a premium choice for high-temperature and corrosive environments, offering unmatched strength, oxidation resistance, and thermal stability. Their seamless construction ensures reliability and performance in critical applications across aerospace, power generation, and chemical processing industries.

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More Grades for your Choice:

Hunan Dinghan New Material Technology Co.,Ltd. (DINGSCO) specialized in Nickel Based Corrosion Resistant and High Temperature alloys products which used in the world’s most technically demanding industries and applications.

We have complete advanced technology facilities to produce best quality alloys to meet exacting your specifications such as VIM (Vacuum lnduction Melting) furnace to provide high purity Alloys,ESR (Electro Slag Re-melting) furnace to enhances the structure and purity of the Alloys, and CNC machining equipments (Lathe, Wire cutting, Drilling,Milling) to provide high precision finished products.

We are dedicated to providing our customers with best quality products,fastest possible deliveries, most competitive prices of Nickel Based Corrosion Resistant and High Temperature alloys in bars,rods,forged flanges, valve parts, forged shapes (shafts, discs, blocks, hubs,rings, cylinders and tailor shapes) according to ASTM,ASME,API,AMS, NACE and other industry standards.

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