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China ASTM B165/B165M Standard Specification for Nickel-Copper Alloy (UNS N04400) Seamless Pipe and Tube Supplier, Factory
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China ASTM B165/B165M Standard Specification for Nickel-Copper Alloy (UNS N04400) Seamless Pipe and Tube Supplier, Factory
Scope  - Covers seamless pipe and tube made from nickel-copper alloy UNS N04400 (commonly known as Alloy 400).  - Applicable to general corrosion-resistant and heat-resistant applications, including condensers, heat exchangers, and other high-performance systems.  - Two unit systems:   - B165: Inch-pound units.   - B165M: SI units (metric).
• Trace elements 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.
Each tube/pipe must be marked with:
ASTM standard (B165/B165M)
Alloy (UNS N04400)
Heat number
Size and temper
Trademark
Keywords & Technical Classifications
Primary Material: UNS N04400 (Alloy 400, Monel 400)
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
Key Characteristics of Alloy 400:
Excellent corrosion resistance in seawater, acids, and alkaline environments. Widely used in marine, chemical processing, heat exchangers, and oil & gas industries.
Frequently Asked Questions (FAQ)
1. What is the difference between ASTM B165 and ASME SB165?
ASTM B165 is the standard specification for industrial applications, while ASME SB165 is the equivalent standard adopted for the Boiler and Pressure Vessel Code (BPVC). They are technically identical in material requirements.
2. Can Alloy 400 seamless pipes be used in marine environments?
Yes, Alloy 400 (UNS N04400) is renowned for its excellent resistance to seawater corrosion and biofouling, making it ideal for marine engineering and offshore applications.
3. What tempers are available for ASTM B165 tubes?
The standard covers various tempers, most commonly "Annealed" for maximum ductility and "Cold-Worked" for higher strength requirements.
4. Is hydrostatic testing mandatory for all orders?
Hydrostatic testing is generally an optional requirement. It should be specifically requested in the ordering information if your application requires pressure verification.
5. What are the common trade names for UNS N04400?
UNS N04400 is most commonly referred to by the generic industry name Alloy 400 or the trade name Monel 400.
6. What certification is provided with ASTM B165 products?
Manufacturers typically provide a Material Test Report (MTR) or a Certificate of Compliance confirming that the heat analysis and mechanical properties meet the specifications of ASTM B165.
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