GB/T 14992-1994 High temperature alloy grades

GB/T 14992-1994 High temperature alloy grades GB/T14992-1994 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
High temperature alloy grades
Types of heat resisting superalloysGB/T 14992—94
Replaces GHn 175--82
This standard applies to the naming of heat resisting superalloy product grades and the provisions of the chemical composition of various product grades. 1 Classification
1.1 According to the basic forming method or special use of the alloy, the alloy is divided into deformed high temperature alloy, cast high temperature alloy, welding high temperature alloy wire and powder high temperature alloy.
1.2 According to the basic constituent elements of the alloy, the alloy is divided into iron-based alloy, nickel-based alloy and cobalt-based alloy. 1.3 According to the main strengthening characteristics of the alloy, the alloy is divided into solid solution strengthening alloy and aging hardening alloy. 2.1 Deformed high temperature alloys are prefixed with the Chinese phonetic letter "GH" ("G" and "H" are the first letters of the Chinese phonetic letter "高" and "合", respectively), followed by four Arabic numerals. The first digit after the symbol "GH" indicates the classification number, namely: 1-- indicates solid solution strengthened iron-based alloys; 2
indicates age hardening iron-based alloys,
indicates solid solution strengthened nickel-based alloys;
|一 indicates age-hardening nickel-based alloy;
indicates solid solution-strengthened cobalt-based alloy;
indicates age-hardening cobalt-based alloy.
The second, third and fourth digits after the symbol "GH" indicate the alloy number. 2.2 Casting high-temperature alloys
use the Chinese phonetic letter symbol "K" as a prefix, followed by three Arabic numerals. The first digit after the derivative symbol "K" indicates the classification number, that is: 2一 indicates age-hardening iron-based alloy; 4
|一 indicates age-hardening nickel-based alloy;
6—· indicates age-hardening cobalt-based alloy. The second and third digits after the symbol "K" indicate the alloy number. 2.3 High-temperature gold wire for welding
Add the "H" symbol before the prefix symbol "GH" ("H" is the first letter of the Chinese pinyin for "welding"), that is, "HGH" is used as the prefix, followed by four Arabic numerals. The meaning of the four Arabic numerals is the same as that of the deformed high-temperature alloy. 2.4 Powder high-temperature alloy | |tt||Add "F" before the prefix symbol "GH\" ("F" is the first letter of the Chinese pinyin for "Fen"), and use "FGH\" as the prefix, followed by Arabic numerals. The first digit after the derivative symbol "FGH" indicates the classification number (the number of digits after the prefix derivative symbol and the specific meaning are to be determined) c
3 Naming procedure for high-temperature alloy grades
Approved by the State Administration of Technical Supervision on April 4, 1994 and implemented on May 1, 1994
GB/T 14992-94www.bzxz.net
.1 For high-temperature alloy grades that have been formally identified by the scientific research and trial production department and transferred to mass production, the unit applying for the transfer or the main research and development unit shall submit a bid to the competent department or its entrusted unit in accordance with the unified rules specified in this standard for naming. Other units shall not arbitrarily use the symbols specified in this standard to name them. 9.2 High-temperature alloy grades in the scientific research and trial production stages may be named by scientific research and trial production codes, enterprise codes or foreign codes before they are formally unified:
3.3 At present, the original grade representation method is allowed. Newly drafted documents and revised documents should adopt the new grade representation method, and the original grade and the new grade shall be listed together, or the original grade shall be written in brackets after the new grade in the text description. 4 High-temperature alloy grades and their chemical composition
4.1 The chemical composition of each alloy grade specified in this standard is only used as a representative of the usual chemical composition range of the alloy grade. It is allowed to specify a stricter chemical composition range in the product standard contract or agreement. 4.2 Deformed high-temperature alloy grades and their chemical composition, see Table 1. 4.8 Casting high-temperature alloy grades and their chemical composition, see Table 2. 4.4 Welding high-temperature alloy wire grades and their chemical composition: see Table 3. 4.5 Permissible deviation of chemical composition of finished products of deformed high-temperature alloys Due to the unevenness of alloy composition during the melting and casting process, when the finished product analysis is performed on the product (including bad material) made from the ingot, the finished chemical composition of the deformed high-temperature alloy is allowed to exceed the chemical composition range specified in Table 1 and Table 3, but should not exceed the deviation specified in Table 4. Unless otherwise agreed by the supply and demand parties, when the product standard, contract or agreement refers to the provisions of this standard, the permissible deviation of the finished chemical composition specified in this standard shall apply.
4. Determination of residual elements and harmful impurity elements When there are special requirements for the content of residual elements (such as Cu, etc.) and harmful impurity elements (such as PbSb, SⅡ, Bi, As, Ag, etc.) in the alloy, it should be separately specified in the product standard or contract or agreement. 2--94
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CI/T 14992--94
Specified range of elements
0.10 -≤0.25
0.05 ~0.25
>0.25 ~0.50
2 0. 60 ~1.00
≥1.00~3.00
Full range
Full range
2 >5.0~15.0
2 15,0 ~ 25. 0
>5.0~10.0
10.0~15.0
715.0 ~30.0
>30.0-60.0
>20,0 ~ 30.0||tt| |2 30.0 ~ 40.0
> 40.4 ~ 60.0
> 60.0 ~ 80.0
GB,T14992-94
Allowable tolerance
Lower deviation
Upper deviation
Range of over-limit
20.50 ~ 1.00
>1.00 - 2.00
2. 00 -3.50
>3.50 - 5.00
>0.20 ~1.00
>0.20~0.50||tt ||2 0. 50 ~ 5. 00
Allowable deviation
Upper deviation
Lower deviation
Additional instructions:
GB/T 14992
The wood standard is proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard was drafted by the Standardization Research Institute of the Ministry of Metallurgical Industry and the Central Iron and Steel Research Institute. The main drafters of this standard are Teng Changling and Li Hankang.
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