Standard Specification for Stainless and Alloy-Steel Turbine-Type Bolting Specially Heat Treated for High-Temperature Service
|Publication Date:||1 November 2015|
The high-temperature properties of the bolting materials and components covered by this specification are dependent upon special heat treatment, which is required. Although the high-temperature properties are not specified, they are implied by control of the chemistry, heat treatment, and roomtemperature properties of the bolting material.
Three levels of bolting strength are covered, designated Grades B4B, B4C, and B4D.
The following referenced general requirements are indispensable for application of this specification: Specification A962/A962M. 1.5 Supplementary requirements are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract.
This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply.
The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
2 For ASME Boiler and Pressure Vessel Code applications see related Specification SA-437 in Section II of that code.
*A Summary of Changes section appears at the end of this standard