If you are looking for a standard related to stainless steel tubing or piping, you likely mean one of the following:
ASTM A269: Covers seamless and welded austenitic stainless steel tubing for general corrosion-resisting and low- or high-temperature service.
ASTM A312: The standard for seamless, welded, and heavily cold worked austenitic stainless steel pipe intended for high-temperature and general corrosive service.
Below is a generated structural overview of a technical paper based on the ASTM A269 standard, which is the most common "A2xx" standard for stainless tubing.
Technical Paper: Overview of ASTM A269 Stainless Steel Tubing 1. Introduction
ASTM A269 is a pivotal specification in the stainless steel industry, establishing requirements for nominal-wall-thickness tubing. These tubes are primarily utilized for general service where corrosion resistance is critical, such as in chemical processing, food production, and laboratory environments. 2. Scope and Grade Classifications
The specification encompasses various grades of austenitic steel, with common types including TP304/304L and TP316/316L. It details both seamless and welded manufacturing processes, ensuring that the resulting products meet strict dimensional and material performance criteria. 3. Chemical and Mechanical Requirements Astm A279 Pdf
Chemical Composition: All materials must conform to precise chemical requirements to ensure intended corrosion resistance.
Heat Treatment: Material must be furnished in the heat-treated condition to optimize mechanical properties.
Mandatory Testing: To ensure integrity, tubes undergo several mechanical tests, including: Flaring and Flange Tests: To check for ductility. Hardness Tests: To verify material strength.
Non-destructive Testing: Each tube must pass either a hydrostatic test or a non-destructive electric test to ensure there are no leaks or internal defects. 4. Dimensional Tolerances
ASTM A269 specifies strict variations for wall thickness and outside diameter. For example, standard tubes generally permit a wall thickness variation of ±12.5%, while smaller tubes (under 1/2 inch) may have variations up to ±15% if they cannot be drawn over a mandrel. 5. Industry Applications
Because of its versatility, A269 tubing is frequently cited in biotechnology and pharmaceutical standards. It is also widely stocked by major metal service centers for use in hydraulic systems and instrumentation. 6. Conclusion If you are looking for a standard related
Standardization through ASTM International provides a global language for material quality, ensuring that engineers can specify A269 tubing with confidence in its safety and performance under corrosive conditions.
A269/A269M Standard Specification for Seamless and ... - ASTM
ASTM A279 was a historical, officially withdrawn standard (replaced by ASTM G31) that provided methodologies for the total immersion corrosion testing of stainless steels. Although obsolete as a standard, its, procedures for calculating corrosion rates via mass loss remain relevant, and the designation is occasionally utilized in industrial product catalogs for austenitic and high-temperature steel grades. Learn more about the, material specifications on the APN Steel ASTM A279 product page GlobalSpec ASTM A279 Stainless Steel Tubes
The ASTM A279 standard, officially titled "Method of Total Immersion Corrosion Test of Stainless Steels,"
was a foundational protocol for evaluating how stainless steel reacts when fully submerged in corrosive environments. Status of ASTM A279 It is important to note that ASTM A279 has been withdrawn
and replaced. In modern engineering and metallurgy, the following standards are now used to fulfill the requirements previously covered by A279: Option 2: IHS Markit (Now S&P Global)
: The primary successor, providing a standard practice for laboratory immersion corrosion testing of metals.
: Often confused with A279 due to the similar number, this is the current active specification for stainless steel bars and shapes used in boilers and pressure vessels. Historical Overview of the Test
When it was active, ASTM A279 provided a systematic way to measure the corrosion rate of various stainless steel grades. The data gathered helped engineers predict the service life of components like storage tanks, piping, and marine equipment.
www.ihs.comA: No. ASME SA-279 is a carbon steel forging specification that was withdrawn in 1997 (replaced by ASME SA-105). That is for pipe flanges and fittings, not castings. Again, irrelevant to heat-resistant alloys.
Many engineers incorrectly substitute ASTM A351 (stainless steel castings) for A297. Do not do this. A351 is for corrosion resistance at room temperature. A297 is designed for oxidation and creep resistance at 1800°F+. Substitution will cause catastrophic furnace failure.
Look closely at your keyboard or your old notes. The numbers "7" and "9" are adjacent. It is highly plausible that a decade ago, someone mis-typed "ASTM A297" as "ASTM A279," and that incorrect reference has since propagated through old forum posts, unofficial spec sheets, and even some procurement documents.
Therefore, any search for an "ASTM A279 PDF" should immediately redirect to obtaining the ASTM A297 PDF.
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.