ASTM B366 Monel 400 WPNC Seamless 90° LR Elbow

ASTM B366 Monel 400 WPNC Seamless 90° LR Elbow
The ASTM B366 Monel 400 WPNC seamless 90° LR elbow is a fitting made of a nickel-copper alloy (Monel 400). It features a 90° angle, is seamless, and has a long radius for reduced pressure drop. This elbow offers excellent resistance to stress corrosion cracking in seawater, freshwater, and various acid salts, making it suitable for use in offshore, chemical, and hydrocarbon processing 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 Grades for Monel Alloy 400 Fittings
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
| Monel 400 | N04400 | 2.4360 | NU-30M | NiCu30Fe | NW 4400 | NA 13 | МНЖМц 28-2,5-1,5 |
ASTM B366 monel 400 Buttweld Fittings Chemical Composition
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr |
| Monel 400 | 0.30 max | 2.00 max | 0.50 max | 0.24max | 28.0-34.0 | 2.50 max | 63.00 min | – |
ASTM B366 monel 400 Buttweld Fittings Mechanical Properties
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Monel 400 | 8.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80,000 , MPa – 550 | Psi – 35,000 , MPa – 240 | 40 % |
ASTM B366 monel 400 Buttweld Fittings Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.8 gm/cm3 | 0.318 lb/in3 |
ASTM B366 Monel 400 WPNC Seamless 90° LR Elbow Key Aspects
ASTM B366: This is the specification standard for wrought nickel and nickel alloy fittings.
Monel 400: A nickel-copper alloy known for its excellent corrosion resistance, especially in seawater and high-temperature steam.
WPNC: This designation indicates butt-weld fittings made from a nickel alloy.
Seamless: The elbow is manufactured without any welds, ensuring greater structural integrity.
90° LR: A 90-degree long-radius elbow with a radius of 1.5 times the pipe diameter reduces pressure drop and improves flow.
ASTM B366 Monel 400 WPNC Seamless 90° LR Elbow Features and Performance
Corrosion Resistance: Provides excellent resistance to stress corrosion cracking in seawater, brackish water, and freshwater. It is also resistant to neutral and alkaline salts.
High-Temperature Strength: Maintains good mechanical properties from subzero temperatures to approximately 538°C (1020°F).
Cold Working: Hardenable only by cold working, resulting in high strength.
ASTM B366 Monel 400 WPNC Seamless 90° LR Elbow Applications
Offshore: Widely used for its resistance to flowing seawater. Chemical and Hydrocarbon Processing: Suitable for handling degassed hydrochloric and hydrofluoric acids, and for use in chemical and hydrocarbon processing equipment.
Other Uses: Suitable for gasoline and fresh water storage tanks, crude oil stills, and heat exchangers.

Gnee Steel specializes in the production of various nickel-based alloys. Gnee Steel's product packaging includes steel strapping: Pipes with an outer diameter of 3 inches or less are typically strapped together with polypropylene film to prevent rust during sea transportation, and then secured with steel strapping. Wooden boxes/crates: Pipes are typically packaged in wooden boxes or crates to protect them during transportation, especially those that are longer or have larger diameters. Seaworthy export packaging: Suppliers typically use standard seaworthy export packaging methods, which may include a variety of materials and techniques to protect the pipes during transportation. Tarpaulin packaging: This prevents rain, seawater, and other external factors from penetrating the export wooden crates during transportation. Gnee Steel specializes in the production and sale of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions based on customer needs. For alloy material pricing inquiries or customized alloy material solutions, please contact us for a quote at ss@gneesteel.com.





