GB/T 14995-2025 English PDFGB/T 14995: Historical versions
Basic dataStandard ID: GB/T 14995-2025 (GB/T14995-2025)Description (Translated English): Wrought superalloy - Hot-rolled plates Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H57 Classification of International Standard: 77.140.99 Word Count Estimation: 14,118 Date of Issue: 2025-08-29 Date of Implementation: 2026-03-01 Older Standard (superseded by this standard): GB/T 14995-2010, GB/T 25827-2010 Issuing agency(ies): State Administration for Market Regulation; Standardization Administration of China GB/T 14995-2025: Wrought superalloy - Hot-rolled plates---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT14995-2025ICS 77.140.99 CCSH57 National Standards of the People's Republic of China Replaces GB/T 14995-2010 and GB/T 25827-2010 Deformed high-temperature alloy hot-rolled sheet Published on 2025-08-29 Implemented on 2026-03-01 State Administration for Market Regulation The State Administration for Standardization issued a statement. ForewordThis 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 14995-2010 "Hot-rolled high-temperature alloy plates" and GB/T 25827-2010 "General technical specifications for high-temperature alloy plates (strips)". Technical Requirements. This document is based on GB/T 14995-2010 and integrates the content of GB/T 25827-2010.(The last part, "与GB/T 14995-2010", appears to be a standard or specification and is left untranslated.) In comparison, aside from structural adjustments and editorial changes, the main technical changes are as follows. a) The width and length ranges of the boards have been changed (see Chapter 1, Chapter 1 of the.2010 edition); b) Three new high-temperature alloy grades, GH3536, GH3625, and GH4169, and their related technical requirements have been added (see Chapter 6); c) The lower limit temperature for the recommended heat treatment of GH3128 alloy plates for solution treatment delivery has been changed (see Table 2, Table 4 in the.2010 edition); d) The requirements for thickness tolerances have been changed (see 6.7.2, 5.3 of the.2010 version); e) Added weight requirements (see 6.7.7); f) The chemical composition test methods have been changed (see 7.1, Table 6 of the.2010 edition); g) The judgment and re-verification rules have been changed (see 8.4,.2010 version of 8.4). 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. Fushun Special Steel Co., Ltd., Panzhihua Iron and Steel Group Jiangyou Great Wall Special Steel Co., Ltd., and Zhejiang Fugang Group Co., Ltd. Limited Liability Company, Beijing Steel Research Institute Gaona Technology Co., Ltd., and Metallurgical Industry Information and Standardization Research Institute. The main drafters of this document are. Chen Qingxin, Zhang Peng, Zhou Yiling, Sun Yongfu, Xu Guohua, Wang Lin, Gu Qiang, Gu Yu, Yan Chengming, Yang Liang, and Zhu Borong. Wang Fu. The previous version releases of the document replaced by this document. ---GB/T 14995, first published in 1982 as GB n179-1982, and first revised in.1994 as GB/T 14995- 1994, second revision in.2010; ---GB/T 25827, first published in.2010. Deformed high-temperature alloy hot-rolled sheet 1.Scope This document specifies the ordering details, manufacturing process, technical requirements, and testing methods for hot-rolled sheets of wrought high-temperature alloys (hereinafter referred to as alloys). Inspection rules, packaging, marking and quality certificates. This document applies to hot-rolled high-temperature alloy plates (hereinafter referred to as plates) with a nominal thickness of 4.00mm to 20.00mm.2 Normative referencesThe 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 222 Permissible deviations in the chemical composition of finished steel GB/T 223 (all parts) Chemical Analysis Methods for Iron and Steel and Alloys GB/T 228.1 Metallic materials – Tensile testing – Part 1.Test method at room temperature GB/T 228.2 Metallic materials – Tensile testing – Part 2.High temperature test method GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1.Test method GB/T 247 General provisions for packaging, marking and quality certificates of steel plates and strips GB/T 709-2019 Dimensions, shape, weight and permissible deviations of hot-rolled steel plates and strips GB/T 2039 Metallic materials - Uniaxial tensile creep test method GB/T 4162 Ultrasonic Testing Method for Forged and Rolled Steel Bars GB/T 6394 Method for Determination of Average Grain Size of Metals GB/T 8651 Ultrasonic Testing Method for Metal Sheets GB/T 11170 Determination of Multi-Element Content in Stainless Steel by Spark Discharge Atomic Emission Spectrometry (Conventional Method) GB/T 14992 Classification and Grades of High-Temperature Alloys and Intermetallic Compounds GB/T 14999.1 High-temperature alloys - Test methods - Part 1.Acid etching inspection of longitudinal low-magnification microstructure and defects GB/T 20066 Sampling and sample preparation methods for the determination of chemical composition of steel and iron GB/T 20123 Determination of Total Carbon and Sulfur Content in Iron and Steel - Infrared Absorption Method After Combustion in a High-Frequency Induction Furnace (Conventional Method) GB/T 20124 Determination of Nitrogen Content in Iron and Steel - Inert Gas Molten Thermal Conductivity Method (Conventional Method) GB/T 20127 (all parts) Determination of trace elements in iron and steel and alloys GB/T 38939 Determination of Multi-Element Content in Nickel-Based Alloys by Spark Discharge Atomic Emission Spectrometry (Conventional Method) Chemical Analysis Methods for HB5220 (All Parts) High-Temperature Alloy HB20241 (All Parts) High Temperature Alloy Chemical Composition Spectroscopic Analysis Method 3.Terms and Definitions The terms and definitions defined in GB/T 14992 apply to this document. 4.Order details Contracts or orders placed in accordance with this document should include the following. a) This document number; b) Product Name; c) Alloy grade; d) Weight (or quantity); e) Smelting methods (see 5.1); f) Delivery status (see 5.2); g) Size specifications; h) Dimensional tolerance group (see 6.7.2); i) Standard and multiple lengths (please specify if required); j) Items or specifications to be negotiated by both the supplier and the buyer and specified in the contract (if not specified, the supplier shall select them); k) Other special requirements. 5.Manufacturing process 5.1 Smelting Method The alloy shall be smelted using the methods specified in Table 1, or other smelting methods that meet the requirements of this document and are agreed upon by both the supplier and the purchaser. The smelting method used should be specified in the contract and quality certificate. Table 1 Smelting methods Brand electric arc furnace Electroslag remelting electric arc furnace Vacuum arc remelting Non-vacuum induction Electroslag remelting Vacuum induction Electroslag remelting Vacuum induction Vacuum arc remelting GH1035 ● - ● - - GH1131 ● - ● - - GH1140 ● ● ● ● - GH2018 - - - ● - GH2132 ● - ● - - GH2302 - - - ● - GH3030 ● - ● - - GH3039 ● ● ● - - GH3044 ● ● ● - - GH3128 - - ● ● - GH3536 ● - ● - - GH3625 - - - ● - GH4099 - - - ● ● GH4169 - - - - ● Note. ● indicates the smelting method used. 5.2 Delivery Status 5.2.1 The boards shall be delivered after solution treatment, alkali and acid washing, leveling, straightening and edge trimming. 5.2.2 Recommended solution treatment regime for board delivery is shown in Table 2.The supplier shall specify the actual solution treatment of the finished boards in the quality certificate. temperature. Table 2 Recommended Solution Heat Treatment Regime for Plate Delivery Conditions Recommended solution treatment regime for the grade GH1035 1100℃~1140℃, air cooling GH1131 1130℃~1170℃, air cooling GH1140 1050℃~1090℃, air cooling GH2018 1100℃~1150℃, air cooling GH2132 980℃~1000℃, air cooling GH2302 1100℃~1130℃, air cooling GH3030 980℃~1020℃, air cooling GH3039 1050℃~1090℃, air cooling GH3044 1120℃~1160℃, air cooling GH3128 1110℃~1180℃, air cooling GH3536 1130℃~1170℃, rapid cooling or water cooling GH3625 ≥870℃, air cooling GH4099 1080℃~1140℃, air cooling GH4169 Select any temperature ±10℃ within the range of 940℃~995℃, air cooling or faster cooling. 6.Technical Requirements 6.1 Grade and Chemical Composition 6.1.1 The alloy grade and chemical composition (smelting analysis) shall conform to the provisions of Table 3. 6.1.2 As required by the buyer, and upon negotiation between the supplier and the buyer and as specified in the contract, the supplier may supply ingredients with a stricter composition range than those specified in Table 3. alloy. 6.1.3 The permissible deviation of the finished chemical composition of the sheet metal shall comply with the provisions of GB/T 222, wherein the finished titanium element chemical composition of GH1140 sheet metal shall be... 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