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01
ASTM B619/B619M Welded Nickel and Nickel-Cobalt Alloy Pipe
Ordering Information
Buyers must specify:
- ASTM Standard (B619-22) and alloy UNS number (e.g., N06625).
- Dimensions (OD, wall thickness, length).
- Condition (as-welded, annealed, cold-worked).
- Finish (pickled, blasted, etc.).
- Certification (if required).
- Additional Testing (e.g., hydrostatic, NDE).
Material Codes (UNS Alloys)
Common alloys covered:
- N02200, N02201 (Nickel 200/201)
- N06600 (Inconel 600)
- N06625 (Inconel 625)
- N08825 (Incoloy 825)
- N10276 (Hastelloy C276)
Chemical Composition
- Strict limits for nickel, chromium, cobalt, molybdenum, and other elements based on UNS alloy.
- Trace elements (e.g., carbon, sulfur) are controlled.
Mechanical Properties
- Tensile strength, yield strength, elongation requirements vary by alloy and condition.
- Example: N06625 annealed pipe must have ≥ 120 ksi (827 MPa) tensile strength.
Inspection & Testing Requirements
- Chemical Analysis: Performed on heat samples.
- Tension Tests: One per lot.
- Hydrostatic Testing: Optional unless specified.
- NDE (Non-Destructive Examination):
- Radiography or dye penetrant testing for welds (if required).
- Visual Inspection: Surface defects must meet acceptance criteria.
Certification & Marking
- Mill Test Reports must include chemical, mechanical, and test results.
- Pipe Marking: Alloy UNS, ASTM standard, heat number, size, and manufacturer’s identification.
Keywords
- Nickel alloy pipe, welded pipe, corrosion-resistant, high-temperature, UNS N06625.
The ASTM B619-22 standard covers welded nickel and nickel-cobalt alloy pipes and includes the following UNS (Unified Numbering System) material codes for the alloys specified:
List of Material Codes (UNS Alloys) in ASTM B619-22
| UNS Number | Common Alloy Name | Primary Composition |
| N02200 | Nickel 200 | 99.6% Ni (low carbon) |
| N02201 | Nickel 201 | 99.6% Ni (very low carbon) |
| N04400 | Monel 400 | Ni-Cu (66% Ni, 31.5% Cu) |
| N06600 | Inconel 600 | Ni-Cr-Fe (72% Ni, 15% Cr) |
| N06625 | Inconel 625 | Ni-Cr-Mo (61% Ni, 21.5% Cr, 9% Mo) |
| N08800 | Incoloy 800 | Ni-Fe-Cr (32.5% Ni, 21% Cr) |
| N08810 | Incoloy 800H | High-carbon 800 variant |
| N08811 | Incoloy 800HT | Stabilized 800H variant |
| N08825 | Incoloy 825 | Ni-Fe-Cr-Mo (42% Ni, 21.5% Cr, 3% Mo) |
| N10276 | Hastelloy C276 | Ni-Mo-Cr (57% Ni, 16% Cr, 16% Mo) |
| N06022 | Hastelloy C22 | Ni-Cr-Mo-W (56% Ni, 22% Cr, 13% Mo) |
| N06059 | Hastelloy C59 | Ni-Cr-Mo (59% Ni, 23% Cr, 16% Mo) |
| N06455 | Hastelloy C-4 | Ni-Mo-Cr (65% Ni, 16% Mo) |
| N06985 | Hastelloy G-3 | Ni-Cr-Fe-Mo-Cu (44% Ni, 22% Cr) |
| N06007 | Hastelloy G-30 | Ni-Cr-Fe-Mo (43% Ni, 30% Cr, 5% Mo) |
| N06200 | Hastelloy C-2000 | Ni-Cr-Mo-Cu (59% Ni, 23% Cr, 16% Mo) |
| N06686 | Inconel 686 | Ni-Cr-Mo-W (58% Ni, 21% Cr, 16% Mo) |
| N10665 | Hastelloy B-2 | Ni-Mo (65% Ni, 28% Mo) |
| N10675 | Hastelloy B-3 | Ni-Mo (65% Ni, 28.5% Mo) |
Notes:
1. Welded Pipe Types: These alloys can be supplied in as-welded, annealed, or cold-worked conditions.
2. Overlap with Other Standards: Some alloys (e.g., N06625, N10276) are also covered in ASTM B622 (seamless pipe) and ASTM B829 (general requirements).
3. Corrosion & High-Temp Use: Alloys like C276 (N10276) and 625 (N06625) are common in aggressive environments.
For exact chemical composition limits and mechanical properties, refer to ASTM B619-22, Table 1 (Chemical) & Table 2 (Mechanical).
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