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Nickel-Copper Alloy UNS N04400 Seamless Pipe and Tube - High-Performance Factory Suppliers in China
Ordering Information
- ASTM designation (B165 or B165M) and year of issue.
- Dimensions (outer diameter, wall thickness, length).
- Temper (e.g., annealed, cold-worked).
- Surface finish (e.g., pickled, polished).
- End finish (e.g., plain, beveled).
- Certification / Test Reports (if required).
- Additional testing (e.g., hydrostatic, nondestructive testing).
Material and Chemical Composition
Alloy UNS N04400 — Chemical Composition Limits:
| Element | Symbol | Limit |
|---|---|---|
| Nickel | Ni | ≥ 63.0% |
| Copper | Cu | 28.0 – 34.0% |
| Iron | Fe | ≤ 2.5% |
| Manganese | Mn | ≤ 2.0% |
| Carbon | C | ≤ 0.3% |
| Silicon | Si | ≤ 0.5% |
| Sulfur | S | ≤ 0.024% |
- Trace elements are limited to avoid detrimental effects on material performance.
Mechanical Properties
Requirements vary by temper (annealed vs. cold-worked):
| Property | Annealed (Typical) | Cold-Worked (Typical) |
|---|---|---|
| Tensile Strength | ≥ 70 ksi (485 MPa) | ≥ 90 ksi (620 MPa) |
| Yield Strength | ≥ 25 ksi (170 MPa) | ≥ 65 ksi (450 MPa) |
| Elongation | ≥ 35% | ≥ 15% |
Inspection & Testing Requirements
- Chemical Analysis: Performed to verify composition (ASTM E1473 or equivalent).
- Mechanical Testing: Tensile tests per ASTM E8/E8M.
- Hydrostatic Testing: Optional; pressure specified by purchaser.
- Nondestructive Testing (NDT): Eddy current or ultrasonic testing if required.
- Visual Inspection: Surface imperfections must not exceed specified limits.
Certification & Marking
- Certification: Manufacturer must provide a Certificate of Compliance with test results.
-
Marking — Each tube/pipe must be marked with:
- ASTM standard (B165 / B165M)
- Alloy designation (UNS N04400)
- Heat number
- Size and temper
- Manufacturer's name or trademark
Keywords & Material Designations
Nickel-Copper Alloy
UNS N04400
Alloy 400
Monel 400
Seamless Pipe
Seamless Tube
Corrosion-Resistant
Heat-Resistant
ASTM B165
ASME SB165
Primary Material Designation: UNS N04400
Common Names: Alloy 400 (generic industry name) | Monel 400 (trade name, Special Metals Corporation)
Werkstoff Number (European): 2.4360
Other Equivalent Standards:
- EN (Europe): NiCu30Fe (EN 2.4360)
- ISO: NiCu30Fe
- ASME SB165: Same as ASTM B165, for ASME Boiler and Pressure Vessel Code applications.
Key Characteristics of UNS N04400 (Alloy 400):
- Corrosion Resistance: Excellent performance in seawater, acids, and alkaline environments.
- Applications: Marine, chemical processing, heat exchangers, and oil & gas industries.
Summary of Material Codes:
| Standard | Material Designation | Common Names |
|---|---|---|
| ASTM B165 / B165M | UNS N04400 | Alloy 400, Monel 400 |
| EN (Europe) | 2.4360 | NiCu30Fe |
| ISO | NiCu30Fe | – |
| ASME SB165 | UNS N04400 | Same as ASTM |
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Frequently Asked Questions (FAQ)
Q
What is ASTM B165 / B165M and what material does it cover?
ASTM B165 / B165M is the Standard Specification for Nickel-Copper Alloy (UNS N04400) Seamless Pipe and Tube. It covers seamless pipe and tube made from Alloy 400 (also known as Monel 400), a nickel-copper alloy with excellent corrosion and heat resistance used in demanding industrial applications.
Q
What is the difference between UNS N04400, Alloy 400, and Monel 400?
They all refer to the same nickel-copper alloy material. UNS N04400 is the official Unified Numbering System designation. "Alloy 400" is the widely used generic industry name, while "Monel 400" is the original trade name registered by Special Metals Corporation. The European equivalent is Werkstoff No. 2.4360 / NiCu30Fe.
Q
What are the available temper conditions for ASTM B165 pipe and tube?
ASTM B165 pipe and tube are available in two primary temper conditions: Annealed (softer, higher elongation, lower strength — suitable for forming operations) and Cold-Worked (higher tensile and yield strength, lower elongation — suitable for pressure applications requiring higher strength).
Q
What industries commonly use ASTM B165 UNS N04400 seamless pipe and tube?
UNS N04400 seamless pipe and tube are widely used in marine engineering, chemical processing plants, heat exchangers, oil & gas production, desalination systems, and offshore platforms — anywhere resistance to seawater, acids, and alkaline environments is critical.
Q
Is ASTM B165 the same as ASME SB165?
Yes, ASME SB165 is essentially identical to ASTM B165 in technical requirements. The difference is that ASME SB165 is adopted under the ASME Boiler and Pressure Vessel Code (BPVC), making it the applicable specification for pressure vessel and boiler construction projects that require ASME compliance.
Q
What testing and certification is required for ASTM B165 pipe and tube?
Required testing includes chemical analysis (per ASTM E1473 or equivalent) and mechanical tensile testing (per ASTM E8/E8M). Optional tests include hydrostatic pressure testing and nondestructive testing (NDT) such as eddy current or ultrasonic inspection. The manufacturer must provide a Certificate of Compliance, and each piece must be marked with the ASTM standard, alloy, heat number, size, temper, and manufacturer's identification.