GB/T 14992-2025 Superalloys and intermetallic compounds—Designation and chemical composition English, Anglais, Englisch, Inglés, えいご
1 Scope
This document specifies the classification, designation naming rules and application, naming methods, representation methods, ISC encoding rules, designation and chemical composition of superalloys and intermetallic compounds high temperature materials.
This document is applicable to guiding the development and revision of product standards and technical agreements for wrought superalloys, (equiaxed crystal, directionally solidified columnar crystal, single crystal) cast superalloys, superalloys for additive manufacturing, powder metallurgy superalloys, dispersion strengthened superalloys, superalloys for welding and intermetallic compounds high temperature materials.
This document is not applicable to be used alone as the technical requirements for ordering superalloys and intermetallic compounds high temperature materials products.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 17616 Iron and steel coding system for irons, steels and alloys
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
superalloy
alloy based on iron, nickel, chromium and cobalt, capable of long-term service at temperatures above 600℃ under certain stresses, possessing excellent high-temperature strength, good oxidation and hot corrosion resistance, as well as good fatigue performance and fracture toughness
3.2
intermetallic compounds high temperature materials
high temperature materials based on intermetallic compounds and capable of maintaining excellent performance in high temperature environments
4 Classification
4.1 Classification of superalloys
According to the matrix constituent elements, they may be classified into four categories: iron-based (iron‑nickel‑based) superalloys, nickel‑based superalloys, chromium‑based superalloys and cobalt‑based superalloys. According to the primary strengthening mechanism, they may be classified into solid solution strengthened superalloys and age‑hardened superalloys. According to the basic forming method or special application, they may be classified into wrought superalloys, equiaxed crystal cast superalloys, directionally solidified columnar crystal cast superalloys, single crystal cast superalloys, powder metallurgy superalloys, dispersion strengthened superalloys, superalloys for additive manufacturing and superalloys for welding.
4.2 Classification of intermetallic compounds high temperature materials
According to the basic constituent elements of intermetallic compounds, they may be classified into nickel-aluminum intermetallic compounds high temperature materials and titanium-aluminum intermetallic compounds high temperature materials.
5 Designation naming rules and naming methods
5.1 Designation naming rules
5.1.1 For superalloys and intermetallic compounds high temperature materials that have passed scientific research, trial production and formal appraisal organized by the competent department and have been transferred to mass production, as well as alloys or materials that have been officially approved for development, produced with stable processes and have available supply, the main production and development unit shall submit an application to the administrative organization of the standard for registration of the material designations.
5.1.2 The superalloys and intermetallic compounds high temperature materials that are in the scientific research or trial production stage should be named according to the designation naming methods specified in this document.
5.2 Designation naming methods
5.2.1 Designation structure
The designations of superalloys and intermetallic compounds high temperature materials are represented by a combination of Chinese phonetic alphabets and Arabic numerals, arranged without spaces between alphabets and numerals. The general structure is shown in Figure 1.
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Designation naming rules and naming methods
6 Designation representation method and application
7 ISC encoding rules
8 General guidelines for determining significant digits of chemical composition
9 Designation, ISC, chemical composition and application
Annex A (Normative) Encoding rules for ISCs of superalloys and intermetallic compounds high temperature materials
Standard
GB/T 14992-2025 Superalloys and intermetallic compounds—Designation and chemical composition (English Version)
Standard No.
GB/T 14992-2025
Status
valid
Language
English
File Format
PDF
Word Count
20000 words
Price(USD)
600.0
Implemented on
2026-3-1
Delivery
via email in 1 business day
Detail of GB/T 14992-2025
Standard No.
GB/T 14992-2025
English Name
Superalloys and intermetallic compounds—Designation and chemical composition
GB/T 14992-2025 Superalloys and intermetallic compounds—Designation and chemical composition English, Anglais, Englisch, Inglés, えいご
1 Scope
This document specifies the classification, designation naming rules and application, naming methods, representation methods, ISC encoding rules, designation and chemical composition of superalloys and intermetallic compounds high temperature materials.
This document is applicable to guiding the development and revision of product standards and technical agreements for wrought superalloys, (equiaxed crystal, directionally solidified columnar crystal, single crystal) cast superalloys, superalloys for additive manufacturing, powder metallurgy superalloys, dispersion strengthened superalloys, superalloys for welding and intermetallic compounds high temperature materials.
This document is not applicable to be used alone as the technical requirements for ordering superalloys and intermetallic compounds high temperature materials products.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 17616 Iron and steel coding system for irons, steels and alloys
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
superalloy
alloy based on iron, nickel, chromium and cobalt, capable of long-term service at temperatures above 600℃ under certain stresses, possessing excellent high-temperature strength, good oxidation and hot corrosion resistance, as well as good fatigue performance and fracture toughness
3.2
intermetallic compounds high temperature materials
high temperature materials based on intermetallic compounds and capable of maintaining excellent performance in high temperature environments
4 Classification
4.1 Classification of superalloys
According to the matrix constituent elements, they may be classified into four categories: iron-based (iron‑nickel‑based) superalloys, nickel‑based superalloys, chromium‑based superalloys and cobalt‑based superalloys. According to the primary strengthening mechanism, they may be classified into solid solution strengthened superalloys and age‑hardened superalloys. According to the basic forming method or special application, they may be classified into wrought superalloys, equiaxed crystal cast superalloys, directionally solidified columnar crystal cast superalloys, single crystal cast superalloys, powder metallurgy superalloys, dispersion strengthened superalloys, superalloys for additive manufacturing and superalloys for welding.
4.2 Classification of intermetallic compounds high temperature materials
According to the basic constituent elements of intermetallic compounds, they may be classified into nickel-aluminum intermetallic compounds high temperature materials and titanium-aluminum intermetallic compounds high temperature materials.
5 Designation naming rules and naming methods
5.1 Designation naming rules
5.1.1 For superalloys and intermetallic compounds high temperature materials that have passed scientific research, trial production and formal appraisal organized by the competent department and have been transferred to mass production, as well as alloys or materials that have been officially approved for development, produced with stable processes and have available supply, the main production and development unit shall submit an application to the administrative organization of the standard for registration of the material designations.
5.1.2 The superalloys and intermetallic compounds high temperature materials that are in the scientific research or trial production stage should be named according to the designation naming methods specified in this document.
5.2 Designation naming methods
5.2.1 Designation structure
The designations of superalloys and intermetallic compounds high temperature materials are represented by a combination of Chinese phonetic alphabets and Arabic numerals, arranged without spaces between alphabets and numerals. The general structure is shown in Figure 1.
Contents of GB/T 14992-2025
Contents
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Designation naming rules and naming methods
6 Designation representation method and application
7 ISC encoding rules
8 General guidelines for determining significant digits of chemical composition
9 Designation, ISC, chemical composition and application
Annex A (Normative) Encoding rules for ISCs of superalloys and intermetallic compounds high temperature materials
