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 Key Spec
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
▶ List of Material Codes (UNS Alloys) in ASTM B619-22
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:
| 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
- Welded Pipe Types: These alloys can be supplied in as-welded, annealed, or cold-worked conditions.
- Overlap with Other Standards: Some alloys (e.g., N06625, N10276) are also covered in ASTM B622 (seamless pipe) and ASTM B829 (general requirements).
- 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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❓ Frequently Asked Questions (FAQ)
Q1
What is ASTM B619-22 and what does it cover?
ASTM B619-22 is a standard specification that covers welded nickel and nickel-cobalt alloy pipes. It defines the requirements for chemical composition, mechanical properties, dimensional tolerances, inspection, testing, and certification for a wide range of UNS alloys used in corrosive and high-temperature applications.
Q2
Which UNS alloys are most commonly used under ASTM B619-22?
The most commonly used alloys include N06625 (Inconel 625), N10276 (Hastelloy C276), N08825 (Incoloy 825), N06600 (Inconel 600), and N02200/N02201 (Nickel 200/201). These alloys are widely chosen for their exceptional resistance to corrosion and high-temperature environments.
Q3
What supply conditions are available for ASTM B619-22 welded pipes?
Welded pipes under ASTM B619-22 can be supplied in three primary conditions: as-welded, annealed, and cold-worked. Buyers must specify the required condition at the time of ordering, as it directly affects the mechanical properties and suitability for specific applications.
Q4
What mechanical property requirements apply to N06625 (Inconel 625) annealed pipe?
For N06625 (Inconel 625) in the annealed condition, ASTM B619-22 requires a minimum tensile strength of 120 ksi (827 MPa). Specific yield strength and elongation requirements are also defined in Table 2 of the standard and must be verified through mill testing.
Q5
Is hydrostatic testing mandatory for ASTM B619-22 pipes?
Hydrostatic testing is not automatically required under ASTM B619-22 — it is optional unless specifically requested by the buyer at the time of ordering. However, non-destructive examination (NDE) such as radiography or dye penetrant testing for welds may be required based on application needs and buyer specifications.
Q6
What documentation is required when purchasing ASTM B619-22 welded nickel alloy pipe?
Suppliers must provide Mill Test Reports (MTR) that include chemical composition results, mechanical test data, and any additional test results requested. Each pipe must also be marked with the alloy UNS number, ASTM standard designation, heat number, size, and the manufacturer's identification to ensure full traceability.