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GB/T 14992-2005 (GBT14992-2005)

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BASIC DATA
Standard ID GB/T 14992-2005 (GB/T14992-2005)
Description (Translated English) Classification and designation for superalloys and high temperature intermetallic materials
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H57
Classification of International Standard 77.140.01
Word Count Estimation 24,250
Date of Issue 2005-07-21
Date of Implementation 2006-01-01
Older Standard (superseded by this standard) GB/T 14992-1994
Drafting Organization CISRI
Administrative Organization Metallurgical Industry Information Standards Institute
Regulation (derived from) Announcement of Newly Approved National Standards No. 10 of 2005 (No. 84 overall)
Proposing organization China Iron and Steel Industry Association
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee
Summary This standard specifies: Inter-temperature alloys and metallic compounds high temperature materials classification, grade nomenclature, the naming process and general chemical composition content. This standard applies to: deformation temperature alloys, cast superalloys, high temperature alloy wire welding, powder metallurgy high-temperature alloys, high temperature materials between dispersion strengthened superalloys compounds and metals.

Standards related to: GB/T 14992-2005

GB/T 14992-2005
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.01
H 57
Replacing GB/T 14992-1994
Classification and designation for superalloys and
high temperature intermetallic materials
ISSUED ON: JULY 21, 2005
IMPLEMENTED ON: JANUARY 01, 2006
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Classification ... 5 
3 Naming rules and use of designation for superalloys and high temperature
intermetallic materials ... 5 
4 Representation method of designation ... 6 
5 Designations of superalloys and high temperature intermetallic materials and
their chemical composition ... 9 
Foreword
This Standard replaces GB/T 14992-1994 “Types of heat-resisting superalloys”.
As compared with GB/T 14992-1994, the main changes of this Standard are as
follows:
- CHANGE the standard name from “Types of heat-resisting superalloys” to
“Classification and designation for superalloys and high temperature
intermetallic materials”;
- ADD categories of high temperature intermetallic materials, i.e. nickel-
aluminum-based and titanium-aluminum-based high temperature
intermetallic materials; at the same time, ADD the corresponding
designation representation methods;
- ADD categories of superalloys, i.e. directionally solidified columnar crystal
superalloys, single crystal superalloys, and dispersion strengthened
superalloys; at the same time, ADD the corresponding designation
representation methods;
- ADD the classification code for superalloys with chromium as the main
element, i.e. “7” and “8” numbers, and use method;
- ADD the designations of superalloys, from the previous 61 to 177;
- “Naming procedure of designation for superalloys” is changed to: “Naming
rules and use of designation for superalloys and high temperature
intermetallic materials”;
- Delete “Permissible tolerances for chemical composition of deformed
superalloy products”;
- The content of subclause “Measurement of the content of residual elements
and harmful impurity elements” is rewritten: “Control of harmful impurity
elements” is incorporated into 5.1 of this Standard; the residual element
“copper” is mainly specified as the general chemical composition of the
designation.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of China Metallurgical Information
and Standardization Institute.
Drafting organizations of this Standard: Central Iron & Steel Research Institute,
China Metallurgical Information and Standardization Institute.
Main drafters of this Standard: Yuan Ying, Yan Ping, Zhuang Jingyun, Li
Shiqiong, Chen Huixia, Zeng Fan, Feng Di, Zhao Minghan.
This Standard was first issued in December 1982, GBn 175-1982; in 1994, it
was adjusted to GB/T 14992-1994.
Classification and designation for superalloys and
high temperature intermetallic materials
1 Scope
This Standard specifies the classification, naming principles and naming
procedures of designation, and general chemical composition, etc. for
superalloys and high temperature intermetallic materials.
This Standard applies to deformed superalloys, cast superalloys (isometric
crystal cast superalloys, directionally solidified columnar crystal superalloys,
and single crystal superalloys), superalloy wire for welding, powder metallurgy
superalloys, dispersion strengthened superalloys and high temperature
intermetallic materials.
2 Classification
2.1 Superalloy classification
According to the basic forming method or special use of alloys, alloys are
classified into deformed superalloys, cast superalloys (isometric crystal cast
superalloys, directionally solidified columnar crystal superalloys, and single
crystal superalloys), superalloy wire for welding, powder metallurgy superalloys,
and dispersion strengthened superalloys.
2.2 Classification of high temperature intermetallic materials
According to the basic constituent elements of the high temperature materials,
the high temperature materials are classified into nickel-aluminum-based high
temperature intermetallic materials and titanium-aluminum-based high
temperature intermetallic materials.
3 Naming rules and use of designation for superalloys
and high temperature intermetallic materials
3.1 For superalloys and high temperature intermetallic materials which have
been scientifically researched, trial-produced, and formally certified and put into
batch production by the competent authorities, and for alloys or materials which
are officially developed by project approval, produced by the state and are
stable in process and available for supply, the main production and
development organizations shall submit registration applications for material
designation to the standard jurisdiction organization.
3.2 Superalloys and high temperature intermetallic materials in the scientific
research and trial-production stage can be named according to the designation
representation method of this Standard.
3.3 It is allowed to use the new designation in parallel with the previous
designation. In technical documents, new and previous designations can be
listed at the same time.
3.4 The designations of superalloys and high temperature intermetallic
materials are represented by a combination of letters and Arabic numerals.
According to special needs, after the designation, English letters can be added,
to indicate the modified alloy of the previous alloy, such as indicating a specific
process or a specific chemical composition, etc.
The general form of designation of superalloys and high temperature
intermetallic materials is:
4 Representation method of designation
4.1 Designation prefix
The designation of deformed superalloy is prefixed with the Chinese phonetic
alphabet “GH” (“G” and “H” are the first letters of Chinese Pinyin “Gao” and “He”,
respectively);
The designation of isometric crystal cast superalloy is prefixed with the Chinese
phonetic alphabet “K”;
The designation of directionally solidified columnar crystal superalloy is prefixed
with the Chinese phonetic alphabet “DZ” (“D” and “Z” are the first letters of
Chinese Pinyin “Ding” and “Zhu”, respectively);
Suffix, an English letter symbol, which indicates a specific process or specific chemical
composition etc. (special need)
The number (two or three digits) which indicates different designations in the same
material category
The number which indicates the classification code of material
Prefix, a Chinese phonetic alphabet symbol (two or three digits), which indicates the
basic feature category
The designation of single crystal superalloy is prefixed with the Chinese
phonetic alphabet “DD” (“D” and “D” are the first letters of Chinese Pinyin “Ding”
and “Dan”, respectively);
The designation of superalloy wire for welding is prefixed with the Chinese
phonetic alphabet “HGH” (The “H” before the “GH” symbol is the first letter of
the Chinese Pinyin “Han”);
The designation of powder metallurgy superalloy is prefixed with the Chinese
phonetic alphabet “FGH” (The “F” before the “GH” symbol is the first letter of
the Chinese Pinyin “Fen”);
The designation of dispersion strengthened superalloy is prefixed with the
Chinese phonetic alphabet “MGH” (The “M” before the “GH” symbol is the first
letter of the Chinese Pinyin “Mi”);
The designation of high temperature intermetallic material is prefixed with the
Chinese phonetic alphabet “JG” (“J” and “G” are the first letters of Chinese
Pinyin “Jin” and “Gao”).
4.2 Arabic numerals
4.2.1 Deformed superalloy and superalloy wire for welding
4.2.1.1 The prefix is followed by four digits. The first digit indicates the alloy’s
classification code. The second to the fourth digit indicate the alloy number; the
alloy number of the insufficient number of digits is filled with the number “0”. “0”
is placed between the first digit indicating the classification code and the alloy
number.
4.2.1.2 The choice of odd-even number for classification code is determined
according to the strengthening type mainly used for the alloy. The first digit in
the designation of superalloy wire for welding has no meaning of strengthening
type, only follows the number of designation of deformed superalloy.
The classification code, i.e. the first digit, is specified as follows:
1 - indicate a solid solution strengthening type alloy in which iron or iron-
nickel (nickel of less than 50%) is a main element;
2 - indicate an ageing strengthening type alloy in which iron or iron-nickel
(nickel of less than 50%) is a main element;
3 - indicate a solid solution strengthening type alloy in which nickel is a main
element;
4 - indicate an ageing strengthening type alloy in which nickel is a main
element;
5 - indicate a solid solution strengthening type alloy in which cobalt is a main
element;
6 - indicate an ageing strengthening type alloy in which cobalt is a main
element;
7 - indicate a solid solution strengthening type alloy in which chromium is a
main element;
8 - indicate an ageing strengthening type alloy in which chromium is a main
element.
4.2.2 Other superalloys and high temperature intermetallic materials
4.2.2.1 The prefix of cast superalloy is generally followed by three Arabic
numerals. The first digit indicates the alloy’s classification code. The second
and third digits indicate the alloy number; the alloy number of the insufficient
number of digits is filled with the number “0”. “0” is placed between the first digit
indicating the classification code and the alloy number.
4.2.2.2 The prefix of powder metallurgy superalloy, dispersion strengthened
superalloy, and high temperature intermetallic material is followed by four
Arabic numerals. The Arabic numerals are as specified in 4.2.1.1.
4.2.2.3 The classification code, i.e. the first digit, is specified as follows:
1 - indicate titanium-aluminum-based high temperature intermetallic material;
2 - indicate an alloy in which iron or iron-nickel (nickel of less than 50%) is a
main element;
4 - indicate alloy and nickel-aluminum-based high temperature intermetallic
material in which nickel is a main element;
6 - indicate an alloy in which cobalt is a main element;
8 - indicate an alloy in which chromium is a main element.
5 Designations of superalloys and high temperature
intermetallic materials and their chemical composition
5.1 The chemical composition of the alloy or material designations listed in this
Standard is a general chemical composition. It is allowed to, in product
standards or contracts and agreements, specify the stricter chemical
composition range, the add value of trace elements, and the index requirements
of harmful elements.
5.2 Designations of deformed superalloys and their chemical composition are
shown in Table 1.
5.3 Designations of cast superalloys (isometric crystal cast superalloys,
directionally solidified columnar crystal superalloys, and single crystal
superalloys) and their chemical composition are shown in Table 2.
5.4 Designations of superalloy wire for welding and their chemical composition
are shown in Table 3.
5.5 Designations of powder metallurgy superalloys and their chemical
composition are shown in Table 4.
5.6 Designations of dispersion strengthened superalloys and their chemical
composition are shown in Table 5.
5.7 Designations of high temperature intermetallic materials and their chemical
composition are shown in Table 6.
Table 1 -- Designations of deformed superalloys and their chemical composition
Table 1 (continued)
New designation
Previous
designation
New
designation
Previous
designation
Chemical composition (mass fraction) of deformed superalloys in which iron or iron-nickel (nickel of less than 50%) is a main element/%
No more than
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Table 1 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction) of deformed superalloys in which iron or iron-nickel (nickel of less than 50%) is a main element/%
New
designatio
Previous
designatio
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
No more than
Table 1 (continued)
New
designation
Previous
designation
New
designatio
Previous
designatio
n No more than
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Chemical composition (mass fraction) of deformed superalloys in which nickel is a main element/%
Table 1 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction) of deformed superalloys in which nickel is a main element/%
New
designatio
Previous
designatio
n No more than
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Table 1 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction) of deformed superalloys in which nickel is a main element/%
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
New
designatio
Previous
designatio
n No more than
Table 1 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction) of deformed superalloys in which nickel is a main element/%
No more than
New
designatio
Previous
designatio
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Table 2 -- Designations of cast superalloys and their chemical composition
New
designation
Previous
designation
New
designatio
Previous
designatio
Remaining
Remaining
Remaining
Remaining
Remaining
No more than
Chemical composition (mass fraction) of deformed superalloys in which cobalt is a main element/%
a The nitrogen content is between 0.130~0.250.
b ADD titanium or niobium, but not both at the same time.
c The nitrogen content is between 0.100~0.200.
d The nitrogen content is between 0.150~0.300.
e The nitrogen content is between 0.300~0.450.
f The tantalum content is no more than 0.050.
Table 2 (continued)
New
designation
Previous
designation
New
designatio
Previous
designatio
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
No more than
Chemical composition (mass fraction) of isometric crystal cast superalloys/%
Table 2 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction) of isometric crystal cast superalloys/%
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
New
designati
on
Previous
designati
on No more than
Table 2 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction) of isometric crystal cast superalloys/%
No more than
New
designati
on
Previous
designati
on
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Table 2 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction) of isometric crystal cast superalloys/%
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
No more than
New
designati
on
Previous
designati
on
Table 2 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction) of isometric crystal cast superalloys/%
No more than
New
designati
on
Previous
designati
on
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Table 2 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction) of directionally solidified columnar crystal superalloys/%
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
New
designati
on
Previous
designati
on No more than
Table 3 -- Designations of superalloy wire for welding and their chemical composition
New
designation
Previous
designation
New
designati
on
New
designati
on
Previous
designati
on
Previous
designati
on
Remaining
Remaining
Remaining
Remaining
Remaining
No more than
No more than
Chemical composition (mass fraction) of single crystal superalloys/%
a The content of tungsten and molybdenum is not less than 7.70.
c The lanthanum content is between 0.020~0.120.
e The selenium content is not more than 0.0001. The tellurium content is
not more than 0.00005. The thallium content is not more than 0.00005.
g The content of aluminum and titanium is between 7.50~7.90.
b The nitrogen content is less than 0.200.
d The nitrogen content is less than 0.030.
f The content of aluminum and titanium is not less than 7.30.
Table 3 (continued)
New
designation
Previous
designation
Chemical composition (mass fraction)/%
New
designati
on
Previous
designati
on No more than
Other
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Table 3 (continued)
New
designation
Previous
designation
New
designati
on
Previous
designati
on
Chemical composition (mass fraction)/%
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Other
No more than
Table 4 -- Designations of powder metallurgy superalloys and their chemical composition
New
designation
Previous
designation
Chemical composition (mass fraction)/%
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
New
designati
on
Previous
designati
on No more than
Other
New
designation
New
designation
Previous
designation
Previous
designation
Chemical composition (mass fraction)/%
Remaining
Remaining
Remaining
No more than
Table 5 -- Designations of dispersion strengthened superalloys and their chemical composition
New
designation
Previous
designation
Chemical composition (mass fraction)/%
Remaining
Remaining
Remaining
Remaining
Remaining
a Only one of tungsten or molybdenum element can be added.
b The copper content is between 0.50~1.50.
Table 6 -- Designations of high temperature intermetallic materials and their chemical composition
__________ END __________
Chemical composition (mass fraction)/%
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
Remaining
No more than
New
designat
ion
Previous
designat
ion
New
designation
Previous
designation
...