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01
ASTM B167/B167M Standard Specification for Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, and N06045) Seamless Pipe and Tube
Ordering Information
Buyers must specify:
- ASTM designation (B167 or B167M for metric)
- Alloy UNS number (e.g., N06600)
- Dimensions (OD, wall thickness, length)
- Condition (annealed, cold-worked, etc.)
- Test requirements (if additional to standard)
- Certification (if needed)
- Special packaging (if required)
Material Codes (UNS Alloys)
Common alloys covered:
- N06600 (Ni-Cr-Fe, general-purpose)
- N06601 (Higher temperature resistance)
- N06690 (Improved corrosion resistance)
- Others: N06603, N06693, N06025, N06045.
Chemical Composition
- Limits for Ni, Cr, Fe, C, Mn, Si, Cu, S, and other trace elements are specified for each alloy.
- Material analysis must conform to ASTM E1473 or equivalent.
Mechanical Properties
- Tensile strength, yield strength, elongation requirements vary by alloy and condition (annealed/cold-worked).
- Example (N06600, annealed):
- Tensile: ≥80 ksi (550 MPa)
- Yield: ≥35 ksi (240 MPa)
- Elongation: ≥30%
Inspection & Testing Requirements
- Chemical analysis (per heat/lot).
- Tensile testing (per lot).
- Hydrostatic or nondestructive testing (e.g., eddy current) for leaks/defects.
- Dimensions and visual inspection (surface defects, straightness).
- Certification: Mill test reports (MTRs) must comply with the standard.
Surface Finish & Dimensions
- Surfaces must be free of scale, cracks, and imperfections.
- Dimensional tolerances for OD, wall thickness, and length are specified.
Certification & Marking
- Marking: ASTM standard, alloy, heat number, size, and manufacturer’s identification.
- Certification: Supplier must provide compliance documentation.
Keywords
Nickel alloys, seamless pipe, corrosion-resistant, high-temperature, UNS N06600, N06690.
Material Codes (UNS Alloys) in ASTM B167/B167M
1. N06025 (Ni-Cr-Fe-Mo-Cu alloy)
2. N06045 (Ni-Cr-Fe-Si alloy)
3. N06600 (Nickel-Chromium-Iron, general-purpose alloy)
4. N06601 (Nickel-Chromium-Iron, improved high-temperature strength)
5. N06603 (Nickel-Chromium-Iron, oxidation-resistant)
6. N06690 (Nickel-Chromium-Iron, low-carbon, corrosion-resistant)
7. N06693 (Nickel-Chromium-Iron-Aluminum, high-temperature resistant)
Key Notes:
- N06600 is the most common alloy in this standard, widely used in high-temperature and corrosive environments.
- N06690 is often used in nuclear applications due to its low carbon content.
- N06601 & N06693 offer enhanced oxidation resistance at elevated temperatures.
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