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The American Society for Testing and Materials (ASTM) uses a logical numbering system. Numbers are not randomly assigned; they follow a historical sequence. Let us look at the surrounding numbers:
In many old indexing systems, numbers were reserved for standards that were proposed but never balloted, or they were intentionally skipped. The most famous heat-resistant casting standard in the "A279 slot" vicinity is ASTM A297. Astm A279 Pdf
When reviewing the technical details of ASTM A279, several factors are strictly controlled: The American Society for Testing and Materials (ASTM)
This paper provides a comprehensive analysis and summary of ASTM A279, the historical Standard Specification for Seamless and Welded Ferritic and Austenitic Stainless Steel Tubing for General Service. This standard was historically utilized to define the requirements for stainless steel tubes used in structural, mechanical, and general corrosive environments where high temperatures and pressures were not the primary concern. This document outlines the scope, chemical composition, mechanical properties, and testing methodologies defined within the standard, serving as a reference for engineers dealing with legacy systems or material substitution. In many old indexing systems, numbers were reserved
A: No. The ASTM standard for alloy steel forgings is A279? Wait, no—that is A290 (Steel Forge Rings) or A788 (Forgings). The US War Department (1946) listed a "Specification A279" for manganese-silicon electrode coatings, but that was a Military Specification, not an ASTM. It was withdrawn in 1955. Do not confuse military specs with ASTM.
ASTM A279 was a standard developed by ASTM International (formerly the American Society for Testing and Materials) to cover a broad range of stainless steel tubing. Unlike standards specifically tailored for high-pressure boilers (e.g., ASTM A213) or sanitary applications (e.g., ASTM A270), ASTM A279 provided guidelines for "General Service."
This classification meant the tubing was suitable for applications involving structural supports, mechanical components, and general fluid transport where standard corrosion resistance was required, but the extreme conditions of nuclear or high-pressure boiler applications were absent. The standard has since been withdrawn by ASTM International, meaning it is no longer actively maintained or updated. It is often replaced by more specific standards or absorbed into broader specifications. However, understanding A279 remains vital for maintenance of older infrastructure and historical engineering analysis.