ASTM B564 UNS N04400 Weld Neck Flange
ASTM B564 UNS N04400 welding neck flanges are wrought nickel-copper alloy (Monel 400) flanges designed for welding pipes. They offer excellent strength, toughness, and corrosion resistance, making them particularly suitable for use in seawater and chemical environments. These flanges are essential for high-pressure, high-temperature, and hazardous applications in the marine, chemical, and offshore industries. Their specific sizes and pressure ratings are defined by standards such as ANSI B16.5.


What is ASTM B564 UNS N04400 material?
ASTM B564 UNS N04400 flanges, also known as Monel alloy 400, are a nickel-based alloy with a certain amount of copper added. ASTM B564 UNS N04400 flanges typically exhibit high tensile strength over a wide temperature range, up to 1000 degrees Fahrenheit (approximately 477 degrees Celsius).
Chemical Properties of ASTM B564 UNS N04400 Nickel Alloy Flange
| Monel 400 | Ni | C | Al | Mn | Si | Fe | Cu | S | Co | Cr |
| 63.0 min | 0.3 max | 0.50 max | 2.0 max | 0.5 max | 1.0 – 2.5 | 28.0 – 34.0 | 0.02 max | – | – |
Mechanical Characteristics of ASTM B564 UNS N04400 Nickel Alloy Flange
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 8.8 g/cm3 | 1350 °C (2460 °F) | Psi - 35,000 , MPa - 240 | Psi - 80,000 , MPa - 550 | 40 % |
ASTM B564 UNS N04400 Nickel Alloy Flange
| Specifications List |
ASTM/ ASME B564 / SB564 |
|---|---|
| Standard Flange | BS, DIN, ASME, ANSI, EN |
| Size Chart | 1/2″up to 48″ (15 - 1200NB) |
| Class / Pressure Rating | PN16, 2500#, PN25, 600#, 150#, 300#, 900#, PN10, 1500#, PN64, PN6, PN40 |
| Flange Type | Weld Neck, Blind, Slip on, Socket, Thread, Long Weld Neck ... |
| ASTM Standards | DIN, ANSI/ASME B16.48, B16.5, BS4504, BS 10, B 16.47 Series A & B, EN-1092 |
Materials and Features:
Material: Made of UNS N04400 (Monel 400 nickel-copper alloy), it offers high tensile strength, toughness, and resistance to various corrosion conditions.
Mechanical Properties: Demonstrates high strength and good mechanical properties even in sub-zero temperatures and can withstand temperatures up to 1000°F (approximately 454°C).
Corrosion Resistance: Excellent resistance to seawater, brine solutions, and harsh chemicals, including hydrofluoric acid, oxidizing salts (such as cupric chloride and ferric chloride), and hypochlorite.
Design and Applications:
Weld Neck Design: Features a tapered hub and tubular end that welds to the pipe, creating a permanent, secure connection.
High-Pressure Applications: The weld neck design is particularly well-suited for high-pressure (900 psi and above) and high-temperature hazardous applications.
Industries: Widely used in seawater applications, chemical plant equipment, and marine equipment, pumps, valves, and piping systems for both offshore and onshore applications.

Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications. We also offer customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.





