DL/T 715-2000 in English

1 Scope
This standard specifies the technical requirements of selection of metallic materials as well as the basic testing items, methods and quality requirements of metallic materials.
This standard is applicable to the maintenance and replacement of in-active-service unit components of the thermal power plants, the selection and substitution of metallic materials for important components of the new units as well as the technical renovation of prolonging the service life of active duty-extended units.
Localization, substitution and maintenance of the foreign-label metallic material may also comply with this standard.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.

Contents
1 Scope
2 Normative References
3 Fundamentals of Material Selection
4 Selections of Metallic Materials
4.1 Metallic materials for steam piping, header tanks and pipes at the boiler heating surface
4.2 Metallic materials for boiler drums
4.3 Metallic materials for fittings and soot blowers at the boiler heating surface
4.4 Metallic materials for the main shafts, rotors, disks and wheels of steam turbines
4.5 Metallic materials for steam turbine generator rotors and nonmagnetic retaining rings
4.6 Metallic materials for turbine blades
4.7 Metallic Materials for Fasteners
4.8 Metallic Materials for Steam Turbines and Boiler Steel Castings
4.9 Tubular Products for Condensers
4.10 Metallic materials for Pressure Vessels
Annex A (Informative Annex) Steel Grades, Characteristics and Application Range of Common Used Steel for the Power Plants