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Seamless Nickel and Nickel Alloy Tubes for Heat Exchangers - China Suppliers and Factory
Referenced Documents
Key standards:
- ASTM B751: General requirements for nickel alloy tubes.
- ASTM E8/E8M: Tensile testing.
- ASTM E29: Rounding test data.
Ordering Information
Buyers must specify:
- ASTM designation (B163 or B163M) and year of issue.
- Alloy UNS number (e.g., N06690).
- Dimensions (OD, wall thickness, length).
- Quantity (total length or number of tubes).
- Certification/Test Reports (if required).
- Special Requirements (e.g., hydrostatic testing, non-destructive examination).
Material and Chemical Composition
-
UNS Alloy Codes: Common grades include:
- Pure Nickel: N02200, N02201.
- Nickel-Copper: N04400.
- Nickel-Chromium-Iron: N06600, N06690.
- Chemical Limits: Strict adherence to composition ranges (e.g., Ni, Cu, Fe, Cr) per ASTM B163 tables.
Mechanical Properties
- Tensile Strength, Yield Strength, Elongation: Varies by alloy (e.g., N06600: min. tensile 80 ksi [550 MPa]).
- Hardness Requirements: Optional, if specified.
- Hydrostatic Testing: Mandatory unless waived; pressure calculated per standard formulas.
Inspection and Testing
- Chemical Analysis: Performed on each heat/lot.
- Mechanical Tests: Tensile tests on samples from finished tubes.
- Non-Destructive Testing (NDT): Eddy current or ultrasonic testing optional unless specified.
- Visual Inspection: Surface defects must not exceed specified limits.
- Certification: Manufacturer must provide compliance certification if requested.
Dimensions and Tolerances
- Outside Diameter (OD): ±0.005 in. or ±0.13 mm for precision tubes.
- Wall Thickness: ±10% typical (varies by size).
- Length: ±1/8 in. for cut lengths; longer tolerances for uncut tubes.
Marking and Packaging
- Marking: Includes ASTM standard, alloy UNS, heat number, size, and manufacturer’s ID.
- Packaging: Protected against damage during shipment (e.g., wooden crates for long tubes).
Keywords & Material Codes
Nickel alloy tubes, seamless tubes, condensers, heat exchangers, corrosion-resistant, high-temperature service.
The ASTM B163/B163M standard covers seamless nickel and nickel alloy tubes for condenser and heat-exchanger applications. Below is a list of the material codes (UNS numbers) included in the latest version of the standard, along with their corresponding alloy names:
| UNS Number | Alloy Name / Common Designation | Primary Composition |
|---|---|---|
| N02200 | Nickel 200 | 99.6% min. Nickel (Ni) |
| N02201 | Nickel 201 (low-carbon Nickel 200) | 99.6% min. Ni, low carbon |
| N04400 | Monel 400 | Ni-Cu (66% Ni, 31.5% Cu) |
| N06600 | Inconel 600 | Ni-Cr-Fe (72% Ni, 15% Cr) |
| N06601 | Inconel 601 | Ni-Cr-Fe (61% Ni, 23% Cr) |
| N06603 | Inconel 603GT | Ni-Cr-Fe with Al & Ti |
| N06690 | Inconel 690 | Ni-Cr-Fe (60% Ni, 30% Cr) |
| N08800 | Incoloy 800 | Fe-Ni-Cr (32% Ni, 21% Cr) |
| N08810 | Incoloy 800H | High-carbon Incoloy 800 |
| N08811 | Incoloy 800HT | Thermally treated 800H |
| N08825 | Incoloy 825 | Ni-Fe-Cr-Mo-Cu (42% Ni, 21.5% Cr) |
| N10276 | Hastelloy C-276 | Ni-Mo-Cr (57% Ni, 16% Mo, 15% Cr) |
Notes:
- UNS (Unified Numbering System) codes are standardized alloy identifiers.
- Common Trade Names: Some alloys are widely known by commercial names (e.g., Monel, Inconel, Incoloy).
- Chemical & Mechanical Properties: Each alloy has specific requirements for composition, tensile strength, and corrosion resistance, detailed in ASTM B163/B163M tables.
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Frequently Asked Questions (FAQ)
What is the ASTM B163/B163M standard?
The ASTM B163/B163M standard covers seamless nickel and nickel alloy tubes specifically designed for condenser and heat-exchanger applications.
What information should buyers provide when ordering?
Buyers must specify the ASTM designation and year, alloy UNS number, dimensions (OD, wall thickness, length), quantity, and any special requirements like hydrostatic testing or certification.
Are hydrostatic tests mandatory for these tubes?
Yes, hydrostatic testing is mandatory unless it is specifically waived by the buyer. The pressure is calculated per standard formulas.
What are the outside diameter (OD) tolerances for precision tubes?
For precision tubes, the typical outside diameter tolerance is ±0.005 inches or ±0.13 mm.
What types of non-destructive testing (NDT) are performed?
Eddy current or ultrasonic testing can be utilized; however, they are considered optional unless specifically requested by the buyer.