#alloy601

In the world of high-temperature and corrosion-resistant metals, astm b167 uns n06601 stands out as a premium material choice for demanding industrial applications. At its core, this specification refers to Alloy 601 Seamless Pipe & Tube manufactured to ASTM B167 standards, featuring the UNS N06601 designation — a nickel-chromium alloy known globally for its exceptional resistance to heat, oxidation, and scaling.

Whether used in petrochemical processing, furnace components, or aerospace systems, materials meeting the astm b167 uns n06601 specification deliver unmatched performance in environments where other alloys fail. In this blog, we’ll explore what makes this material special, its technical advantages, typical properties, and where it is most widely used.

What Is ASTM B167 UNS N06601?

The term astm b167 uns n06601 refers to a specific standard and material grade in the ASTM system:

ASTM B167 — This is the specification that governs the manufacture of seamless pipe and tube products made from various nickel-chromium-iron alloys. It sets the requirements for chemical composition, mechanical properties, dimensions, testing, and quality for these products.

UNS N06601 — This unique number identifies Alloy 601, a nickel-based alloy with high chromium and added aluminum for enhanced performance in oxidizing and high-temperature environments.

Combined, astm b167 uns n06601 refers to seamless pipe and tube components fabricated from Alloy 601 according to the ASTM B167 standard — a combination that is internationally recognized and trusted across industries.

Chemical & Mechanical Characteristics

One of the reasons astm b167 uns n06601 is such a sought-after material is its balanced chemical composition, which drives excellent performance at both ambient and elevated temperatures:

Chemical Composition (Typical):

Nickel (Ni): 58.0–63.0%

Chromium (Cr): 21.0–25.0%

Aluminum (Al): 1.0–1.7%

Iron (Fe): Balance

Manganese (Mn), Silicon (Si), Copper (Cu), Carbon (C), Sulfur (S) — Within controlled limits

The high nickel and chromium content provides corrosion resistance comparable to many stainless steels, while the aluminum further strengthens oxide scale formation at temperatures above 1000 °C.

Mechanical Properties (Typical):

Tensile Strength: ≥550 MPa

Yield Strength (0.2% Offset): ≥205 MPa

Elongation: ≥30%

Density: ~8.11 g/cm³

Melting Range: ~1360–1411 °C

These properties mean astm b167 uns n06601 is strong, ductile, and resilient under thermal stress and mechanical load — making it ideal for components that must endure cyclic heating and cooling without degrading.

Key Benefits of ASTM B167 UNS N06601

🔥 Superior High-Temperature Performance

Alloy 601 excels in environments where temperatures exceed the limits of conventional stainless steels. Its oxidation resistance remains stable even beyond 1000 °C, enabling prolonged use in high-temperature furnaces, radiant tubes, and heat-treating equipment.

🛡️ Resistance to Carburization & Sulfidation

The alloy resists carburization (carbon uptake) and sulfidation better than many competitive materials. This is especially important in industrial processes like chemical processing and thermal oxidizers, where reactive gases and high heat are present.

⚙️ Excellent Fabricability

Despite its strength, astm b167 uns n06601 products can be welded, formed, and machined with relative ease compared with other high-performance alloys — a benefit when custom fittings or assemblies are required.

🔄 Thermal Stability & Long-Term Service

Alloy 601 maintains a stable microstructure under prolonged exposure to extreme conditions, reducing the risk of embrittlement or failure over time.

Typical Applications

Thanks to these robust characteristics, astm b167 uns n06601 finds widespread use across major industrial sectors:

Heat Treatment & Industrial Furnaces – Tubes and radiant components in continuous thermal cycles.

Petrochemical & Refinery Equipment – Piping subject to high temperatures and corrosive media.

Power Generation Systems – Superheater tubes, steam generator parts, and high-temperature exhaust systems.

Aerospace Components – Elements in heat shields, combustor liners, and afterburner ducts.

Chemical Processing Plants – Reactors, heat exchangers, and piping exposed to oxidizing environments.

Conclusion

Choosing astm b167 uns n06601 products means selecting a high-temperature nickel alloy solution that combines strength, reliability, corrosion resistance, and thermal stability — essential traits in sectors where performance can’t be compromised.