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GB/T 12773-2021: Valve steel and superalloy bars for internal combustion engines
Status: Valid GB/T 12773: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12773-2021 | English | 339 |
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Valve steel and superalloy bars for internal combustion engines
| Valid |
GB/T 12773-2021
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| GB/T 12773-2008 | English | 679 |
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3 days [Need to translate]
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Valve steel and superalloy bars for internal combustion engines
| Obsolete |
GB/T 12773-2008
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| GB/T 12773-1991 | English | 319 |
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Valve steel bars for internal combustion engines--Technical requirements
| Obsolete |
GB/T 12773-1991
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PDF similar to GB/T 12773-2021
Basic data | Standard ID | GB/T 12773-2021 (GB/T12773-2021) | | Description (Translated English) | Valve steel and superalloy bars for internal combustion engines | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H44 | | Word Count Estimation | 18,161 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 12773-2021: Valve steel and superalloy bars for internal combustion engines---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Valve steel and superalloy bars for internal combustion engines
ICS 77.140.60
CCSH44
National Standards of People's Republic of China
Replace GB/T 12773-2008
Steel and alloy bars for internal combustion engine valve
(ISO 683-15.1992,Heat-treatablesteels,aloysteelsandfree-cutting
Released on 2021-05-21
2021-12-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 12773-2008 "Steel and Alloy Bars for Internal Combustion Engine Valves", and compared with GB/T 12773-2008, except for
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The normative references have been changed (see Chapter 2, Chapter 2 of the.2008 edition);
b) The short rule requirements have been changed (see 6.1.5, 5.1.5 of the.2008 edition);
c) The size range is changed (see 6.1, 5.1 of the.2008 edition);
d) The grain size requirements have been changed (see 7.8, 6.8 in the.2008 edition);
e) Changed the surface roughness Ra≤1.6μm (see 7.11.3, 6.10.4 of the.2008 edition);
f) Wire rods and corresponding technical requirements have been added (see 6.1.6, 6.2, 7.3, 7.4, 7.11.4, Chapter 8, Chapter 9, Chapter 10);
g) The Ni content requirement of 85Cr18Mo2V has been added (see 7.1.1);
h) Added the hardness requirements for delivery in quenched and tempered state (see 7.4);
i) Added Ni30 grade and corresponding technical requirements (see 7.1.1, 7.4, 7.5);
j) The requirement of DS for non-metallic inclusions has been added (see 7.9);
k) Deleted the 86Cr18W2VRe brand (see Table 2 of the.2008 edition);
l) The comparison table of steel and superalloy grades for internal combustion engine valves in various countries has been deleted (see Appendix B of the.2008 edition);
m) Modified the technical differences between this document and ISO 683-15.1992 and the reasons (see Appendix A, Appendix D and
Appendix E).
This document uses the redrafting method to amend and adopt ISO 683-15.1992, Heat Treated Steel, Alloy Steel and Free-cutting Steel Part 15.Internal Combustion
Steel for Machine Air Valves".
This document is technically related to ISO 683-15.1992 "Heat-treated steel, alloy steel and free-cutting steel Part 15.Steel for internal combustion engine valve"
Differences, Appendix A gives a list of corresponding technical differences and their reasons.
This document has made the following editorial changes.
---Adjusted the position of individual chapters in ISO.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible 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).
Drafting organizations of this document. Baosteel Special Steel Long Products Co., Ltd., Jiangsu Shenyuan Group Co., Ltd., Jiangsu Xinghai Special Steel Co., Ltd., Yongxing Special Steel Co., Ltd.
Materials Technology Co., Ltd., Xiwang Special Steel Co., Ltd., Huaiji Lunar Valve Co., Ltd., Taizhou Huameng Metal Material Co., Ltd.,
Gold Industry Information Standards Institute.
The main drafters of this document. Li Bao, Zhao Heng, Wang Yujie, Peng Shidan, Ji Jiankang, Gao Yibin, Liu Jinchi, Mo Dongqiang, Liu Guohua, Ji Renfeng,
Tu Yuguo, Liu Baoshi, Liu Jun, Wu Minghua, Wang Zhonghui, Sun Ge, Liu Qi, Ren Cuiying, Wang Cheng, Yu Guohong.
The previous versions of this document and the documents replaced are as follows.
---This document was first published in March.1991 and revised for the first time in May.2008;
---This is the second revision.
Steel and alloy bars for internal combustion engine valve
1 Scope
This document specifies the definition and terminology, classification, order content, size, shape and weight, technical requirements,
Test methods, inspection rules, packaging, markings and quality certificates.
This document is applicable to hot-rolled and forged bars with a diameter not greater than 120mm and cold-rolled bars with a diameter not greater than 35mm for the manufacture of internal combustion engine gas valves.
Drawn steel, silver bright steel, alloy bars and wire rods.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 222 The allowable deviation of the chemical composition of the finished steel
GB/T 223.8 Methods for chemical analysis of iron, steel and alloy. Sodium fluoride separation-EDTA titration method for the determination of aluminum content
GB/T 223.11 Determination of chromium content in iron, steel and alloy by visual titration or potentiometric titration (GB/T 223.11-2008,
ISO 4937.1986, MOD)
GB/T 223.13 Methods for chemical analysis of iron, steel and alloy. The ferrous ammonium sulfate titration method for the determination of vanadium content
GB/T 223.17 Methods for chemical analysis of iron, steel and alloy The diantipyrine methane photometric method for the determination of titanium content
GB/T 223.19 Methods for chemical analysis of iron, steel and alloy, neocuproine-chloroform extraction spectrophotometric method for the determination of copper content
GB/T 223.22 Methods for chemical analysis of iron, steel and alloy-The nitroso R salt spectrophotometric method for the determination of cobalt content
GB/T 223.25 Methods for chemical analysis of iron, steel and alloy-The dimethylglyoxime gravimetric method for the determination of nickel content
GB/T 223.26 Steel and alloy determination of molybdenum content-Thiocyanate spectrophotometric method
GB/T 223.28 Methods for chemical analysis of iron, steel and alloy-The α-benzoin oxime gravimetric method for the determination of molybdenum content
GB/T 223.36 Methods for chemical analysis of iron, steel and alloy. Distillation separation-neutralization titration method for the determination of nitrogen content
GB/T 223.40 Steel and alloy determination of niobium content-Chlorosulfonol S spectrophotometric method
GB/T 223.43 Determination of tungsten content in iron, steel and alloy by gravimetric method and spectrophotometric method
GB/T 223.49 Methods for Chemical Analysis of Steel and Alloys Extraction Separation-Chlorophosphonazo mA Spectrophotometric Determination of Total Rare Earth
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy. The perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.61 Methods for chemical analysis of iron, steel and alloy-The ammonium phosphomolybdate volumetric method for the determination of phosphorus content
GB/T 223.64 Determination of manganese content in steel and alloy by flame atomic absorption spectrometry (GB/T 223.64-2008,
ISO 10700.1994, IDT)
GB/T 223.67 Steel and alloy determination of sulfur content-Methylene blue spectrophotometric method (GB/T 223.67-2008,
ISO 10701.1994, IDT)
GB/T 223.69 Steel and alloy carbon content determination after combustion in tube furnace gas volume method
GB/T 223.70 Iron, steel and alloys-Determination of iron content-Phenanthroline spectrophotometric method
GB/T 223.75 Steel and alloy determination of boron content methanol distillation-curcumin photometric method
GB/T 223.79 Determination of multi-element content of steel by X-ray fluorescence spectrometry (conventional method)
GB/T 223.85 Determination of Sulfur Content in Iron and Steel and Alloys by Infrared Absorption Method after Induction Furnace Combustion (GB/T 223.85-2009,
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