Section II, titled "Materials," functions as a "service Code" for other sections of the BPVC, such as Section I (Power Boilers) and Section VIII (Pressure Vessels). This means that instead of each section re-listing the detailed requirements for every material, they simply reference the relevant material specification in Section II, ensuring consistency and preventing conflicting information. Section II is divided into four distinct parts to systematically cover all material requirements for code construction.
ASME BPVC Section II, Part A is a standard published by the American Society of Mechanical Engineers (ASME) that provides specifications for ferrous materials, including steels, for boilers, pressure vessels, and piping. This section is part of the ASME Boiler and Pressure Vessel Code (BPVC), which is widely adopted by regulatory authorities and industries worldwide.
Each specification includes detailed tables for:
The ASME Boiler and Pressure Vessel Code (BPVC) is a set of standards for the design, fabrication, inspection, and testing of boilers and pressure vessels. Section II of the BPVC is divided into two parts: Part A (Materials) and Part B (Nonferrous Materials).
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: Materials in this section are identified by SA numbers (e.g., SA-106). These specifications are largely adopted from ASTM International standards and modified where necessary for boiler and pressure vessel safety.
: Remember that Part A provides the material specification , but the allowable design stresses across various temperatures must be extracted from ASME Section II Part D . Keep both PDFs open simultaneously when performing calculations. Summary of Core Ferrous Materials in Pressure Vessels Material ID Common Name / Form Typical Application Key Characteristic SA-106 Grade B Seamless Carbon Steel Pipe High-temperature process piping Excellent weldability, high temperature limits SA-516 Grade 70 Carbon Steel Plate Moderate to low-temperature vessels High tensile strength, good notch toughness SA-105 Carbon Steel Forging Flanges, valves, and fittings Excellent machinability and structural strength SA-182 F316 Austenitic Stainless Steel Forging Corrosive or high-temperature systems High resistance to pitting and chloride corrosion ✅ Summary of Key Takeaways
ASME BPVC Section II Part A 2019 PDF: A Guide to Ferrous Material Specifications Section II, titled "Materials," functions as a "service
If your work involves pressure vessels, boilers, or high-temperature piping, the 2019 edition of ASME BPVC Section II Part A remains a cornerstone of due diligence. Treat your copy with the same seriousness as a legal contract—because, in the eyes of safety law, it is exactly that.
The specifications are mandatory for components constructed to other sections of the BPVC, such as Section I (Power Boilers) or Section VIII (Pressure Vessels). Why Accessing the 2019 Edition Matters
: Find the material specification and grade in Section II Part A .
Section II Part A is organized systematically by material types using alphanumeric designations. These designations help engineers locate exact requirements for specific structural and pressure-retaining shapes: ASME BPVC Section II, Part A is a
Covers carbon steel, alloy steel, stainless steel, and high-temperature steel.
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Revised referencing of Charpy V-notch requirements to align with ASME Section VIII, Div. 1 (2019 mandatory Appendix 3).