
ASTM B564 Monel 400 Nickel Alloy Blind Flange
ASTM B564 Monel 400 blind flanges are nickel-copper alloy flanges conforming to ASTM B564. They are known for their excellent corrosion resistance to seawater, various acids (especially degassed hydrofluoric and hydrochloric acids), and alkaline solutions. Their high strength and good mechanical properties in both elevated temperatures (up to 1000°F) and sub-zero temperatures make them ideal for marine, chemical processing, and oil and gas applications.
Is Monel 400 alloy magnetic?
Monel 400 alloy is not always non-magnetic, as its room temperature magnetism depends on its chemical composition and thermal history, with a Curie temperature close to the ambient temperature range. While Monel 400 alloy is widely used for its corrosion resistance, it is slightly magnetic at room temperature but loses its magnetism at higher temperatures.

Equivalent Material of ASTM B564 UNS N04400 Nickel Alloy Flange
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
| Monel 400 | N04400 | 2.4360 | NU-30M | NiCu30Fe | NW 4400 | NA 13 | ----- 28-2,5-1,5 |
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 |
| ASTM Standards | DIN, ANSI/ASME B16.48, B16.5, BS4504, BS 10, B 16.47 Series A & B, EN-1092 |
Manufacturing Process of Monel 400 Flanges

Materials and Composition
Alloy: Monel 400 (UNS N04400), a nickel-copper alloy with approximately 67% nickel and 23% copper.
Standard: ASTM B564 / ASME SB564, which specifies nickel alloy forgings.
Key Features
Corrosion Resistance: Excellent resistance to seawater, steam, brackish water, and degassed hydrochloric and hydrofluoric acids.
Temperature Range: Maintains strength and mechanical properties from sub-zero to 1000°F (approximately 450°C).
Mechanical Strength: High tensile strength and toughness.
Weldability: Easy to weld, suitable for a variety of applications.
Stress Corrosion Cracking: Excellent resistance to stress corrosion cracking.
Applications
Marine: Due to its resistance to seawater corrosion and high mechanical properties in marine conditions.
Chemical and Petrochemical Processing: Can handle a variety of corrosive substances, such as acids and alkaline solutions. Oil and gas industry: It can be used in fluid handling systems due to its compatibility with different fluids.

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.





