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China Suppliers of ASTM B165/B165M Nickel-Copper Alloy UNS N04400 Seamless Pipe and Tube from Factory
Ordering Information
Orders must specify the following:
- 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
| Element | Requirement |
|---|---|
| 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
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 (UNS N04400)
- Heat number
- Size and temper
- Manufacturer's name or trademark
Keywords & Material Identification
Nickel-Copper Alloy
UNS N04400
Alloy 400
Seamless Pipe
Seamless Tube
Corrosion-Resistant
Heat-Resistant
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: NiCu30Fe (EN 2.4360)
- ISO: NiCu30Fe
- ASME SB165: Same as ASTM — for ASME Boiler and Pressure Vessel Code applications
Key Characteristics of UNS N04400 (Alloy 400)
-
Composition:
- Ni (Nickel): ≥ 63%
- Cu (Copper): 28 – 34%
- Fe (Iron): ≤ 2.5%
- Mn (Manganese): ≤ 2.0%
- C (Carbon): ≤ 0.3%
- Corrosion Resistance: Excellent 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 a standard specification that covers seamless pipe and tube made from Nickel-Copper Alloy UNS N04400 (commonly known as Alloy 400 or Monel 400). It defines requirements for chemical composition, mechanical properties, inspection, testing, certification, and marking of the product.
Q
What is the chemical composition of UNS N04400 (Alloy 400)?
UNS N04400 consists primarily of Nickel (≥63%), Copper (28–34%), Iron (≤2.5%), Manganese (≤2.0%), Carbon (≤0.3%), Silicon (≤0.5%), and Sulfur (≤0.024%). Trace elements are carefully controlled to prevent detrimental metallurgical effects.
Q
What is the difference between annealed and cold-worked temper for ASTM B165 pipe?
Annealed temper offers higher ductility with a minimum tensile strength of 70 ksi (485 MPa) and elongation ≥35%, making it suitable for forming applications. Cold-worked temper provides higher strength (tensile ≥90 ksi / 620 MPa, yield ≥65 ksi / 450 MPa) with reduced elongation (≥15%), ideal for high-pressure service conditions.
Q
What testing and inspection methods are required under ASTM B165?
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 methods. Visual inspection is also required to ensure surface imperfections remain within specified limits.
Q
What are the equivalent international standards for ASTM B165 / UNS N04400?
UNS N04400 is equivalent to EN 2.4360 (NiCu30Fe) under European standards, NiCu30Fe under ISO standards, and ASME SB165 for boiler and pressure vessel code applications. The common trade name is Monel 400, originally registered by Special Metals Corporation.
Q
What industries and applications use ASTM B165 Nickel-Copper Alloy pipe and tube?
ASTM B165 Alloy 400 seamless pipe and tube are widely used in marine engineering (seawater piping, heat exchangers), chemical processing (handling acids and alkaline media), oil and gas industries, and power generation. Its excellent corrosion resistance in seawater and aggressive chemical environments makes it a preferred material for demanding service conditions.