The stress level at which plastic deformation begins.
The specifications in Section II Part A are largely based on or identical to those published by the . In the ASME code, these are designated with an "SA" prefix (e.g., SA-516), whereas the original ASTM standards use an "A" prefix (e.g., A516). While they are often identical, users must verify if the ASME edition has specific additional requirements for code construction. Accessing the 2019 Edition
Specifications for forged and cast components used in piping systems and pressure vessel connections (e.g., SA-105, SA-182).
Section II Part A contains hundreds of individual material specifications. These specifications are designated by an "SA" prefix (e.g., SA-106, SA-516), which signifies that the ASME organization has adopted the material, often adapted from standard ASTM International ferrous specifications.
When ASME adopts an ASTM specification, it prefixes the designation with the letter "S". For example:
Understanding ASME BPVC Section II Part A (2019): A Comprehensive Guide
The 2019 edition continued the ongoing effort to harmonize ASME specifications with international standards (like EN and JIS) via ASTM, making it easier to source materials globally.
