GB/T 14992-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 14992-2025	779	Add to Cart	6 days	Superalloys and intermetallic compounds - Designation and chemical composition	Valid
GB/T 14992-2005	250	Add to Cart	Auto, < 3 mins	Classification and designation for superalloys and high temperature intermetallic materials	Valid
GB/T 14992-1994	439	Add to Cart	4 days	Types of heat-resisting superalloys	Obsolete

Basic data

Standard ID: GB/T 14992-2025 (GB/T14992-2025)
Description (Translated English): Superalloys and intermetallic compounds - Designation and chemical composition
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H57
Classification of International Standard: 77.140.99
Word Count Estimation: 39,380
Date of Issue: 2025-08-29
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 14992-2005
Issuing agency(ies): State Administration for Market Regulation; Standardization Administration of China

GB/T 14992-2025: Superalloys and intermetallic compounds - Designation and chemical composition

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ICS 77.140.99 CCSH57 National Standards of the People's Republic of China Replaces GB/T 14992-2005 High-temperature alloys and intermetallic compounds Brand and chemical composition Published on 2025-08-29 Implemented on 2026-03-01 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document supersedes GB/T 14992-2005 "Classification and Designation of High-Temperature Alloys and Intermetallic Compounds", and is consistent with... Compared with GB/T 14992-2005, apart from structural adjustments and editorial changes, the main technical changes are as follows. a) Added terms and definitions (see Chapter 3); b) Added naming rules for additive manufacturing high-temperature alloy grades (see Chapters 5 and 6); c) A unified numerical designation for alloy grades has been added (see Chapter 7); d) Added provisions regarding the significant figures for chemical components (mass fraction) (see Chapter 8); e) Added GH1180, GH1333, GH2018, GH2026, GH2070, GH2132A, GH2136, GH2150A, GH2328, GH2787, GH3181, GH3230, GH3535, GH3617, GH4061, GH4065A, GH4070, GH4079, GH4096, GH4137, GH4151, GH4169G, GH4169D, GH4175, GH4198, GH4251, A total of 31 wrought high-temperature alloy grades and their chemical compositions, including GH4350, GH4720Li, GH4780, GH4975, and GH5605S. Points. K2136, K403Q, K414, K417A, K420, K435, K438A, K439B, K444, K446, K447A, K452 K461, K465, K487, K492M, K4125, K4141, K4208, K2222, K4951, K606, K640S, K644, K6509, DZ406, DZ408, DZ411, DZ468, DD405, DD407, DD426, DD432, DD498, DD499 (total) 35 new high-temperature alloy grades and chemical compositions for casting have been added, including HGH2907, HGH2909, HGH3004, and HGH3230. HGH3617, HGH3625, HGH4061, HGH4099, HGH4141, HGH4163, HGH4222, HGH4518, A total of 16 high-temperature alloy wire grades and chemical compositions for welding, including HGH4738, HGH5188, HGH5605, and HGH6004. The project added two powder metallurgy high-temperature alloys, FGH4091 and FGH4098, and two powder metallurgy high-temperature alloys, JG4006E and JG4010. The grades and chemical compositions of high-temperature intermetallic compound materials have been expanded to include ZGH2018, ZGH3171, and ZGH3230. ZGH3536, ZGH3625, ZGH4038, ZGH4047, ZGH4051, ZGH4061, ZGH4099, ZGH4169, A total of 14 additive manufacturing high-temperature alloy grades and their chemical compositions, including ZGH4251, ZGH5188, and ZGH6509 (see Chapter 9); f) Ten high-resolution domains were deleted. K211, K401, K402, K407, K417L, K430, K491, K610, DZ4002, and JG4246. Grades of high-temperature alloys and intermetallic compounds (see 5.3 and 5.7 in the.2005 edition); g) The chemical formulas of GH2130, GH2132, GH2987, GH3039, GH4033, GH4586, K213, K4130, and DD406 were changed. Ingredients, and the original designations of MGH2756 and MGH2757 (see Chapter 9, Chapter 5 of the.2005 edition). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China Iron and Steel Association. This document is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This document was drafted by. Beijing Steel Research Institute Gaona Technology Co., Ltd., Metallurgical Industry Information and Standardization Research Institute, and Fushun Special Steel Co., Ltd. Limited Company, Beijing Institute of Aeronautical Materials Co., Ltd., Institute of Metal Research, Chinese Academy of Sciences, Xi'an Thermal Power Research Institute Co., Ltd., Panzhihua Iron & Steel Group Co., Ltd. Tuanjiangyou Great Wall Special Steel Co., Ltd., Western Superconducting Materials Technology Co., Ltd., and Sichuan Liuhe Special Metal Materials Co., Ltd. The main drafters of this document are. Bi Zhongnan, Chen Huixia, Dai Qiang, Wang Lin, Gu Qiang, Zhang Huaxia, Zhou Yizhou, Yuan Yong, Pei Binghong, Li Qinqin, and Su Shuo. Gu Yu, Yang Yujun, Yan Chengming, Yu Ang, Sun Yuan, Yan Jingbo, Xu Ding, Cao Guoxin, Wei Jiaxiang. The release history of this document and the document it replaces is as follows. ---First published in 1982 as GB n175-82, revised to GB/T 14992-1994 in.1994, and first revised in.2005; ---This is the second revision. High-temperature alloys and intermetallic compounds Brand and chemical composition 1.Scope This document specifies the classification, naming rules and usage, naming methods, and representation of high-temperature alloys and intermetallic compound high-temperature materials. Methods, unified digital code coding rules, grades and their chemical composition. This document is applicable to guiding the development of wrought high-temperature alloys, (equiaxed crystals, directionally solidified columnar crystals, single crystals) cast high-temperature alloys, and additive manufacturing high-temperature alloys. Product standards and technical agreements for gold, powder metallurgy superalloys, dispersion-strengthened superalloys, welding superalloys, and intermetallic compound superalloys. The formulation and revision of [the relevant regulations/revisions]. This document does not apply to the ordering technical requirements for high-temperature alloys and intermetallic compound high-temperature materials products alone.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 17616 Unified Numerical Designation System for Steel and Alloy Grades 3.Terms and Definitions The following terms and definitions apply to this document. 3.1 Superaloy high-temperature alloy Based on iron, nickel, chromium, and cobalt, it can operate for extended periods at temperatures above 600℃ and under certain stress, exhibiting excellent high-temperature strength. It is an alloy with good oxidation and hot corrosion resistance, good fatigue performance, and good fracture toughness. 3.2 High-temperature materials based on intermetallic compounds that can maintain excellent performance under high-temperature conditions. 4.Classification 4.1 Classification of High-Temperature Alloys Based on their matrix composition, high-temperature alloys can be classified into four categories. iron-based (iron-nickel-based) high-temperature alloys, nickel-based high-temperature alloys, chromium-based high-temperature alloys, and cobalt-based high-temperature alloys. Based on their primary strengthening characteristics, high-temperature alloys can be classified into solid solution-strengthened high-temperature alloys and age-hardening high-temperature alloys. According to the basic composition of the alloy... Based on their shape or special application, high-temperature alloys can be classified into wrought high-temperature alloys, equiaxed crystal cast high-temperature alloys, directionally solidified columnar crystal cast high-temperature alloys, and single-crystal cast high-temperature alloys. It is used to manufacture high-temperature alloys, powder metallurgy high-temperature alloys, dispersion-strengthened high-temperature alloys, additive manufacturing high-temperature alloys, and welding high-temperature alloys. 4.2 Classification of Intermetallic Compound High-Temperature Materials Based on the basic constituent elements of intermetallic compounds, they are divided into nickel-aluminum intermetallic compound high-temperature materials and titanium-aluminum intermetallic compound high-temperature materials. Material. 5.Naming rules and methods for trademarks 5.1 Naming Rules for Trademarks 5.1.1 All high-temperature alloys and intermetallic compounds that have undergone scientific research, trial production, and formal evaluation by the competent authority, and have been transferred to mass production... Materials, as well as alloys or materials that are officially developed, produced, and manufactured under national projects with stable processes and available supply, shall be submitted to the standards by the main production and research units. The relevant unit submits a registration application for the material grade. 5.1.2 High-temperature alloys and intermetallic compound high-temperature materials in the research and development and trial production stages should be named according to the grade naming method in this document. 5.2 Brand Naming Method 5.2.1 Brand Structure The designations for high-temperature alloys and intermetallic compound high-temperature materials use a combination of Chinese Pinyin letters and Arabic numerals, with the letters and numbers... The method of seamless arrangement is shown in Figure 1. The prefix (5.2.2) represents the Chinese Pinyin alphabetic symbols (one to three characters) indicating the basic characteristic category. The classification number (5.2.3) is a single Arabic numeral representing the classification number of the material. The number (5.2.4) indicates different grade numbers (two or three digits) within the same material category. The suffix (5.2.5) is an English letter symbol indicating a specific process or chemical composition, etc. (when necessary). Figure 1.Schematic diagram of brand structure 5.2.2 Prefix The determination is based on the alloy's processing or material properties, and is represented by the following one to three Chinese Pinyin letters. a) GH, a designation for wrought high-temperature alloys, prefixed with the Chinese pinyin letters "GH" ("G" and "H" represent "high" and "alloy" respectively). The first letter of the pinyin); b) K, the grade of equiaxed crystal cast high-temperature alloy, is prefixed with the Chinese pinyin letter "K"; (and the first letter of the pinyin for "pillar") (The first letter of the pinyin) e) HGH, a high-temperature alloy grade for welding, prefixed with the Chinese pinyin letters "HGH" (the "H" before "GH" stands for "welding" in pinyin). (The first letter of the pinyin) f) FGH, a powder metallurgy high-temperature alloy grade, prefixed with the Chinese pinyin letters "FGH" (the "F" before "GH" stands for "powder"). The first letter of the Chinese Pinyin) g) MGH, a dispersion-strengthened high-temperature alloy grade, prefixed with the Chinese pinyin letters "MGH" (the "M" before "GH" stands for "弥"). The first letter of the Chinese Pinyin) h) ZGH, a high-temperature alloy grade for additive manufacturing, prefixed with the Chinese pinyin letters "ZGH" (the "Z" before "GH" stands for "增" in pinyin). (The first letter of the pinyin) i) JG, a grade for high-temperature intermetallic compound materials, prefixed with the Chinese pinyin letters "JG" ("J" and "G" represent "gold" and "high" respectively). The first letter of the pinyin. 5.2.3 Classification Number 5.2.3.1 The classification number is represented by a single Arabic numeral. 5.2.3.2 The classification numbers for wrought high-temperature alloys, additive manufacturing high-temperature alloys, and high-temperature alloy wires for welding are specified as follows. 1--- Indicates a solid solution strengthened alloy with iron or iron-nickel (nickel content less than 50%) as the main element; 2--- Indicates an age-hardening alloy with iron or iron-nickel (nickel content less than 50%) as the main element; 3---Indicates a solid solution strengthened alloy with nickel as the main element; 4---Indicates an age-hardening alloy with nickel as the main element; 5---Indicates a solid solution strengthened alloy with cobalt as the main element; 6---Indicates an age-hardening alloy with cobalt as the main element; 7---Indicates a solid solution strengthened alloy with chromium as the main element; 8--- indicates an age-hardening alloy with chromium as the main element. Note 1.The first Arabic numeral in the grade of high-temperature alloy wire for welding does not indicate the type of strengthening; it only follows the numerals of the grade of wrought high-temperature alloy. Note 2.The choice of odd or even number for the classification number is determined according to the main strengthening type used in the alloy. 5.2.3.3 The classification numbers for cast high-temperature alloys, powder metallurgy high-temperature alloys, and dispersion-strengthened high-temperature alloys are specified as follows. 2--- Indicates an alloy with iron or iron-nickel (nickel content less than 50%) as the main element; 4---Indicates an alloy with nickel as the main element; 6---Indicates an alloy with cobalt as the main element; 8--- indicates an alloy with chromium as the main element. 5.2.3.4 The classification codes for high-temperature intermetallic compound materials are specified as follows. 1---Indicates a high-temperature material based on titanium-aluminum intermetallic compounds; 4--- indicates high-temperature materials of nickel-aluminum intermetallic compounds. 5.2.4 Number Two or three Arabic numerals are used to represent different grades within the same material category. 5.2.5 Suffix When there are special requirements, English letters are used to represent a specific process or specific chemical composition of a certain brand. 6.Designation Methods and Applications 6.1 The designations of high-temperature alloys and intermetallic compound high-temperature materials shall be compiled according to the following rules. a) Prefixes for wrought superalloys, additive manufacturing superalloys, welding superalloys, powder superalloys, and dispersion-strengthened superalloys Later, a four-digit number was adopted, with the first digit representing the classification number and the second to fourth digits representing the serial number (if the serial number has fewer than three digits). When filling in the blanks, use the number "0" to fill in the blanks. Place the "0" in the first position between the number representing the classification number and the serial number. b) Cast high-temperature alloys are generally followed by a three- or four-digit Arabic numeral prefix. The first digit indicates the classification number; the second digit... The fourth digit represents the serial number; if the serial number is insufficient, it is padded with zeros. A zero placed in the first position indicates that the classification number is related to the serial number. Between the numbers. c) For high-temperature intermetallic compound materials, the prefix is followed by four Arabic numerals. The first digit indicates the classification number; the second to fourth digits... The first digit represents the number, and any number of digits less than 1 is padded with zeros. A zero placed in the first position indicates the classification number and the overall number. between. ......

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