TECHNICAL LIBRARY · ASTM CORROSION-RESISTANT SEAMLESS TUBULARS
ASTM B668-23 — Iron-Nickel-Chromium-Molybdenum Seamless Pipe and Tube
Procurement reference for UNS N08028 and N08029 seamless pipe and tube under ASTM B668.
Edition control: ASTM B668-23 is the active edition identified in the official ASTM catalogue checked on 1 September 2026. Confirm the authorised publication and purchase-order requirements before use.
Scope in Procurement
ASTM B668 covers cold-finished or hot-finished seamless pipe and tube in UNS N08028 and N08029 for general corrosive service. The selected alloy and solution-annealed condition form part of the ordered material identity.
RFQ and Product Controls
- Exact UNS N08028 or N08029 and ASTM B668-23 edition
- Process medium, temperature, pressure duty and governing design specification
- Pipe or tube designation, dimensions, wall basis, length and tolerances
- Cold-finished or hot-finished route and required solution-annealed condition
- Chemical and mechanical requirements for the selected alloy
- Flaring and hydrostatic or nondestructive examination requirements
- ASTM B829 requirements, inspection document, heat-and-lot traceability, marking and destination
The material identity must remain traceable from the producing heat and lot through manufacture, seamless processing, heat treatment, testing, inspection documentation, marking and final release.
Scope Boundary
ASTM B668 does not establish suitability for a particular corrosive medium and does not make N08028 and N08029 interchangeable. Corrosion assessment, welding procedure, pressure-code acceptance and final component design are separate project controls.
Related MNK Technical Pages
Official Publication and Access Policy
Check the official record for ASTM B668-23. This page is an original procurement-oriented summary. Protected grade tables, property values, tolerances, dimensions and test clauses are not reproduced on this website.
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