Astm A279 Pdf ~upd~ May 2026

ASTM A279 is a discontinued historical standard that was formerly used for the Total Immersion Corrosion Test of Stainless Steels . It was officially withdrawn by ASTM International in 1975 and replaced by more modern testing protocols. Overview of ASTM A279

Before its withdrawal, ASTM A279 provided a standardized procedure for evaluating the resistance of stainless steels to corrosion when completely submerged in a liquid medium. The goal was to provide a controlled environment to measure weight loss and observe pitting or other forms of surface degradation. Key Aspects of the Former Standard

: To determine the suitability of specific stainless steel grades for service in corrosive chemical environments. Methodology

: It involved immersing polished or prepared metal coupons in a specified boiling solution (often nitric acid) for set periods, typically five 48-hour periods. Evaluation

: Results were calculated based on the corrosion rate, usually expressed in inches per month (ipm) or millimeters per year (mm/y), derived from the weight loss of the specimen. Why was it Withdrawn?

The standard was retired because the industry moved toward more comprehensive and specialized testing methods. Specifically, ASTM A279's functions were largely absorbed or superseded by

, which is the current "Standard Guide for Laboratory Immersion Corrosion Testing of Metals." Current Alternatives for Stainless Steel Testing Astm A279 Pdf

If you are looking for modern standards to replace the requirements once covered by A279, consider the following:

: The primary guide for laboratory immersion corrosion testing for all metals, including stainless steel.

: This is the most common standard for detecting susceptibility to intergranular attack in austenitic stainless steels (often called the "Huey Test" or "Streicher Test").

: Used specifically for pitting and crevice corrosion resistance using ferric chloride solutions. Accessing the Document

Because ASTM A279 is a "Withdrawn" standard, it is generally not available for free as a PDF on the ASTM website

. However, you can usually purchase "Historical Versions" directly from the ASTM International website ASTM A279 is a discontinued historical standard that

if you need it for forensic engineering or to fulfill legacy contract requirements. like ASTM G31 or A262?

2. Scope and Application

The ASTM A279 specification covered both seamless and welded tubing.

• Seamless Tubing: Produced by piercing a solid billet, resulting in a tube without a welded seam. This offers superior pressure containment and structural integrity.
• Welded Tubing: Produced by rolling strip metal and welding the seam. This is generally more cost-effective for lower-pressure applications.

The standard encompassed several grades of ferritic and austenitic stainless steel, allowing for selection based on specific corrosion resistance and mechanical needs. The tubing was typically supplied in the annealed condition, though other heat treatments were permitted if specified.

1. Introduction

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.

Part 5: Best Practices for Using ASTM A297 (The Real Standard)

Once you download the correct ASTM A297 PDF, here is how to use it effectively: Seamless Tubing: Produced by piercing a solid billet,

Q4: Could this be a confusion with ASME SA-279?

A: 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.

Introduction: The Search for a Missing Standard

If you have landed on this page searching for the "ASTM A279 PDF," you are likely experiencing a common frustration in the engineering and metallurgical world. You need a material specification for heat-resistant alloy castings, but your search keeps hitting dead ends.

Here is the critical truth: There is no active or historical ASTM standard designated as A279.

The most probable standard you are looking for is ASTM A297 (Standard Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application). Alternatively, you might be searching for a legacy document related to a different alloy group. This article will serve two purposes:

1. Explain why "ASTM A279" does not exist and what you likely need instead.
2. Provide a comprehensive guide to obtaining the correct ASTM A297 PDF, including its chemical requirements, mechanical properties, and where to find legitimate copies.

Let’s clear up the confusion and get you the right standard.

Chemical Composition

The standard dictates the exact percentage of elements such as Chromium, Nickel, Molybdenum, and Carbon. For example, a common grade like 304 stainless under this specification must typically contain between 17.5% and 19.5% Chromium and 8.0% to 10.5% Nickel to ensure the formation of the passive oxide layer that prevents rust.

The Ultimate Guide to ASTM A279 PDF: Specifications, Downloads, and Alternatives