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GB/T 38688-2020 English PDF (GBT38688-2020)

GB/T 38688-2020 English PDF (GBT38688-2020)

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GB/T 38688-2020: Corrosion-resistant alloy of hot rolled plates

This Standard stipulates the order content, dimensions, shapes, weights, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of corrosion-resistant alloy of hot rolled plates. The scope of application of this Standard is: nickel-based, iron-nickel-based, pure nickel and nickel-copper-based corrosion-resistant alloy of hot rolled plates with the nominal thickness of 3.0 mm ~ 200 mm, the nominal width of not more than 3,000 mm and the nominal length of not more than 15,000 mm.
GB/T 38688-2020
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.140.50
H 59
Corrosion-resistant Alloy of Hot Rolled Plates
ISSUED ON: MARCH 31, 2020
IMPLEMENTED ON: OCTOBER 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Order Content ... 7
4 Dimensions, Shapes and Weights ... 7
5 Technical Requirements ... 10
6 Test Methods ... 6
7 Inspection Rules ... 6
8 Packaging, Marking and Quality Certificate ... 7
Appendix A (informative) Recommended Thermal Treatment Temperatures for Corrosion-resistant Alloy Designations ... 8
Foreword
This Standard was drafted in accordance with the rules in GB/T 1.1-2009. This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of National Technical Committee 183 on Iron and Steel of Standardization Administration of China (SAC/TC 183). The drafting organizations of this Standard: BAOSTEEL Special Steel Co., Ltd.; ANSTEEL Jiangyou Changcheng Special Steel Co., Ltd.; SINOPEC Engineering Incorporation; Shanghai ERAUM Alloy Materials Co., Ltd.; China Metallurgical Information and Standardization Institute.
The main drafters of this Standard: Ma Tianjun, Li Xiaodong, Fangyi, Ma Mingjuan, Wang Jinguang, Luanyan, Wei Yujun, Fu Huaqing.
Corrosion-resistant Alloy of Hot Rolled Plates
1 Scope
This Standard stipulates the order content, dimensions, shapes, weights, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of corrosion-resistant alloy of hot rolled plates.
The scope of application of this Standard is: nickel-based, iron-nickel-based, pure nickel and nickel-copper-based corrosion-resistant alloy of hot rolled plates with the nominal thickness of 3.0 mm ~ 200 mm, the nominal width of not more than 3,000 mm and the nominal length of not more than 15,000 mm (hereinafter referred to as plates). 2 Normative References
The following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy - The Diantipyryl Methane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content
GB/T 223.4 Alloyed Steel - Determination of Manganese Content - Potentiometric or Visual Titration Method
GB/T 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.8 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Fluoride Separation - EDTA Titration Method for the Determination of Aluminum Content
GB/T 223.9 Iron, Steel and Alloy - Determination of Aluminum Content - Chrome Azurol S Photometric Method
GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method
GB/T 223.17 Methods for Chemical Analysis of Iron, Steel and Alloy - The Diantipyrylmethane Photometric Method for the Determination of Titanium Content GB/T 223.78 Methods for Chemical Analysis of Iron, Steel and Alloy - Curcumin Spectrophotometric Method for the Determination of Boron Content
GB/T 223.79 Iron and Steel - Determination of Multi-element Contents - X-ray Fluorescence Spectrometry (routine method)
GB/T 223.86 Steel and Iron - Determination of Total Carbon Content - Infrared Absorption Method after Combustion in an Induction Furnace
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature
GB/T 228.2 Metallic Materials - Tensile Testing - Part 2: Method of Test at Elevated Temperature
GB/T 230.1 Metallic Materials - Rockwell Hardness Test - Part 1: Test Method (scales A, B, C, D, E, F, G, H, K, N, T)
GB/T 247 General Rule of Acceptance, Package, Mark and Certification for Steel Plates (sheets) and Strips
GB/T 709 Dimension, Shape, Weight and Tolerances for Hot-rolled Steel Plates and Sheets
GB/T 2039 Metallic Materials - Uniaxial Creep Testing Method in Tension GB/T 2970 Method for Ultrasonic Testing of Thicker Steel Plates
GB/T 2975 Steel and Steel Products - Location and Preparation of Samples and Test Pieces for Mechanical Testing
GB/T 6394 Metal - Methods for Estimating the Average Grain Size
GB/T 8651 Flaw Detection Method by the Ultrasonic Plate Wave for Metal Plates GB/T 10561-2005 Steel - Determination of Content of Non-metallic Inclusions - Micrographic Method Using Standards Diagrams
GB/T 11170 Stainless Steel - Determination of Multi-element Contents - Spark Discharge Atomic Emission Spectrometric Method (routine method)
GB/T 15007 Designations of Corrosion-resistant Alloy
GB/T 15260 Standard Test Method for Intergranular Corrosion of Nickel Alloys by Corrosion of Metals and Alloys
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition
GB/T 20123 Steel and Iron - Determination of Total Carbon and Sulfur Content - Infrared Absorption Method after Combustion in an Induction Furnace (routine method) GB/T 20124 Steel and Iron - Determination of Nitrogen Content - Thermal Conductimetric Method after Fusion in a Current of Inert Gas
GB/T 36164 High Alloy Steel - Determination of Multi-element Contents - X-ray Fluorescence Spectrometry (routine method)
YB/T 4395 Steel Determination of Molybdenum, Niobium and Tungsten Contents - Inductively Coupled Plasma Atomic Emission Spectrometric Method
YS/T 325.2 Methods for Chemical Analysis of Nickel-copper Alloy - Part 2: Determination of Copper Content - Electrolysis Weight Method
3 Order Content
Contract or order form that orders in accordance with this Standard at least shall include the following content:
a) Serial No. of this Standard;
b) Product name (or trade name);
c) Uniform digital code or alloy designation;
d) Dimensions and accuracy;
e) Weight or quantity;
f) Smelting method (see 5.2);
g) Delivery state (see 5.3);
h) Ultrasonic testing qualification level (see 5.6);
i) Special requirements (see 5.8).
4 Dimensions, Shapes and Weights
4.1 Thickness and Allowable Deviation
The thickness and allowable deviation of plates shall comply with the stipulations in Table 1.
plates. Or, inspection items, such as intergranular corrosion and non-metallic inclusions, may be supplemented.
6 Test Methods
6.1 The inspection items and test methods of plates shall comply with the stipulations in Table 9.
6.2 The chemical composition analysis of plates shall be conducted in accordance with GB/T 223.76, GB/T 223.78, GB/T 223.79, GB/T 223.86, GB/T 20123, GB/T 20124, GB/T 36164 and GB/T 11170, or other universal methods. However, arbitration shall be conducted in accordance with the stipulations in GB/T 223.3, GB/T 223.4, GB/T 223.5, GB/T 223.8, GB/T 223.9, GB/T 223.11, GB/T 223.17, GB/T 223.20, GB/T 223.25, GB/T 223.28, GB/T 223.29, GB/T 223.30, GB/T 223.36, GB/T 223.38, GB/T 223.40, GB/T 223.42, GB/T 223.43, GB/T 223.50, GB/T 223.65, GB/T 223.72, GB/T 223.73, GB/T 223.76, GB/T 223.78, GB/T 223.86, YB/T 4395 and YS/T 325.2.
7 Inspection Rules
7.1 Inspection and Acceptance Inspection
The quality of plates shall receive inspection and acceptance inspection conducted by the supply-side?€?s quality supervision department. The supply-side shall ensure that the delivered plates comply with the stipulations of this Standard. The demand-side is entitled to conduct inspection and acceptance inspection in accordance with the stipulations of this Standard.
7.2 Principle of Group Batch
Plates shall receive inspection and acceptance inspection by batches. Each batch shall be constituted of plates of the same designation, the same furnace No., the same thickness and the same thermal treatment heats.
7.3 Sampling Size and Sampling Location
The sampling size and sampling location of plates shall comply with the stipulations in Table 9.
7.4 Re-inspection and Determination Rules
7.4.1 When the result of chemical composition analysis is disqualified, re-sampling is allowed, so as to conduct re-inspection of the disqualified elements. If the re-inspection result is still disqualified, then, this furnace batch shall be determined as disqualified. 7.4.2 When one of the test results of room-temperature tensile, average grain size, hardness, uniaxial tensile creep, intergranular corrosion and non-metallic inclusion is disqualified, then, from the same batch of plates (including plates in the previous inspection), take a double size of samples for a re-inspection of the disqualified items. The re-inspection results shall all comply with the requirements of this Standard. Otherwise, this batch of plates shall be determined as disqualified. The supply-side is allowed to re-conduct thermal treatment of the plates that are disqualified in the re-inspection (excluding non- metallic inclusion), then, submit them as a new batch for acceptance inspection. 7.4.3 When plates are disqualified in the ultrasonic testing, and the inspection of surface quality, dimensions and shapes, then, the individual piece of plate shall be determined as disqualified.
8 Packaging, Marking and Quality Certificate
The packaging, marking and quality certificate of plates shall comply with the stipulations of GB/T 247.

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