ASME Section II: Materials

Scope

ASME Section II consists of four parts, three of which contain material specifications and the fourth the properties of materials which are invoked for construction of items within the scope of the various sections of the ASME Boiler and Pressure Vessel Code and ASME B31, Code for Pressure Piping. Therefore, ASME Section II is considered a supplementary section of the code.

Part A: Ferrous Material Specifications: Part A contains material specifications for steel pipe, flanges, plates, bolting materials, and castings and wrought, cast, and malleable iron. These specifications are identified by the prefix SA followed by a number such as SA-53 or SA-106.

Part B: Nonferrous Material Specifications: Part B contains materials specifications for aluminum, copper, nickel, titanium, zirconium, and their alloys. These specifications are identified by the prefix SB followed by a number such as SB-61 or SB-88.

Part C: Specifications for Welding Rods, Electrodes, and Filler Metals: Part C contains material specifications for welding rods, electrodes and filler materials, brazing materials, and so on. These specifications are identified by the prefix SFA followed by a number such as SFA-5.1 or SFA-5.27.

Part D: Properties: Part D covers material properties of all those materials that are permitted per Sections I, III, and VIII of the ASME Boiler and Pressure Vessel Code.

Subpart 1 contains allowable stress and design stress intensity tables for ferrous and nonferrous materials for pipe, fittings, plates, bolts, and so forth. In addition, it provides tensile strength and yield strength values for ferrous and nonferrous materials, and lists factors for limiting permanent strain in nickel, high-nickel alloys, and high-alloy steels.
 

Subpart 2 of Part D has tables and charts providing physical properties, such as coefficient of thermal expansion, moduli of elasticity, and other technical data needed for design and construction of pressure-containing components and their supports made from ferrous and nonferrous materials.

Effective Edition, Addenda, and Code Cases

The application of ASME Section II is mandatory only when referenced by other sections of the ASME Boiler and Pressure Vessel Code, ASME B31, Code for Pressure Piping, and various other industry codes and standards.

The applicable edition and addenda of ASME Section II shall correspond to the edition and addenda of the referencing code or standard. Use of a later or the latest edition and addenda of ASMESection II is permissible provided it is acceptable to the enforcement authorities having jurisdiction over the site where the component is to be installed.

For items within the scope of ASME Section XI, the effective edition and addenda of ASME Section II shall be in accordance with the requirements of ASME Section XI.

In case of nonnuclear items or applications, the effective edition addenda and code case shall be determined as described for ASME Section I. Use of code cases related to materials for ASME Section III applications may be made in accordance with the recommendations of Regulatory Guide 1.85, Materials Code Case Acceptability,ASMESection III, Division 1. The code cases, as approved with or without limitations and listed in Regulatory Guide 1.85, may be used. The code case(s) not listed as approved in Regulatory Guide 1.85 by the U.S. Nuclear Regulatory Commission (NRC) may only be used after seeking approval from the NRC.