GB/T 38690-2020 PDF in English
GB/T 38690-2020 (GB/T38690-2020, GBT 38690-2020, GBT38690-2020)
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Corrosion-resistant alloy hot-rolled sheets and strips
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GB/T 38690-2020: PDF in English (GBT 38690-2020) GB/T 38690-2020
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 59
Corrosion-resistant Alloy Hot-rolled Sheets and Strips
ISSUED ON: MARCH 31, 2020
IMPLEMENTED ON: OCTOBER 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s 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 ... 5
7 Inspection Rules ... 5
8 Packaging, Marking and Quality Certificate ... 6
Appendix A (informative) Recommended Thermal Treatment Temperatures for
Corrosion-resistant Alloy Designations ... 7
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: Baoshan Iron & Steel Co., Ltd.; Pangang
Group 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, Wang Jinguang,
Ma Mingjuan, Luan Yan, Fu Huaqing, Xu Ding.
Corrosion-resistant Alloy Hot-rolled Sheets and Strips
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 hot-rolled sheets and strips.
This Standard is applicable to nickel-based, iron-nickel-based, pure nickel ad nickel-
copper-based corrosion-resistant alloy hot-rolled wide strips, and shear sheets and
slitting strips with a nominal thickness of 2.5 mm ~ 8.0 mm and a nominal width of not
more than 1,500 mm (hereinafter referred to as sheets and strips).
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 223.20 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Potentiometric Titration 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 223.28 Methods for Chemical Analysis of Iron, Steel and Alloy - The -
benzoinoxime Gravimetric Method for the Determination of Molybdenum Content
GB/T 223.29 Iron, Steel and Alloy - Determination of Lead Content - Carrier
Precipitation-xylenol Orange Spectrophotometric Method
GB/T 223.30 Methods for Chemical Analysis of Iron, Steel and Alloy - The Arsenazo III
Spectrophotometric Method for the Determination of Zirconium Content after
Separation by P-bromomandelic Acid
GB/T 223.36 Methods for Chemical Analysis of Iron, Steel and Alloy - The Neutral
Titration Method for the Determination of Nitrogen Content after Distillation Separation
GB/T 223.38 Methods for Chemical Analysis of Iron, Steel and Alloy - The Anion-
exchange Separation-gravimetric Method for the Determination of Niobium Content
GB/T 223.40 Iron, Steel and Alloy - Determination of Niobium Content by the
Sulphochlorophenol S Spectrophotometric Method
GB/T 223.42 Methods for Chemical Analysis of Iron, Steel and Alloy - The Anion-
exchange Separation-bromopyrogallol Red Photometric Method for the Determination
of Tantalum Content
GB/T 223.43 Iron, Steel and Alloy - Determination of Tungsten Content - Gravimetric
Method and Spectrophotometric Method
GB/T 223.50 Methods for Chemical Analysis of Iron, Steel and Alloy - The
Phenylfluorone-CTMAB Direct Photometric Method for the Determination of Tin
Content
GB/T 223.65 Steel, Iron and Alloy - Determination of Cobalt Content - Flame Atomic
Absorption Spectrometric Method
GB/T 223.72 Iron, Steel and Alloy - Determination of Sulfur Content - Gravimetric
Method
GB/T 223.73 Iron, Steel and Alloy - Determination of Iron Contents - Titanium
Trichloride-potassium Dichromate Titration Method
GB/T 223.76 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame
Atomic Absorption Spectrometric Method for the Determination of Vanadium 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 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 231.1 Metallic Materials - Brinell Hardness Test - Part 1: Test Method
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 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 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
Contracts or orders placing orders in accordance with this Standard shall at least
include the following content:
a) Serial No. of this Standard;
b) Product name (or trade name);
c) Uniform digital code or alloy designation;
d) Accuracy of dimensions and shapes (see Chapter 4);
e) Weight or quantity;
f) Smelting method (see 5.2);
g) Delivery state (see 5.3);
h) Special requirements (see 5.7).
4 Dimensions, Shapes and Weights
4.1 Thickness and Allowable Deviations
The thickness and allowable deviations of sheets and strips shall comply with the
stipulations in Table 1.
width.
4.7 Tower Shape
Strips shall be firmly wound into a roll. In addition, the one-side tower shape of the roll
shall be not more than 35 mm. If there are special requirements for the inner diameter
of the roll, they shall be indicated in the contract.
4.8 Weight
Sheets and strips shall be delivered in accordance with the actual weight.
5 Technical Requirements
5.1 Chemical Composition
5.1.1 The designation and chemical composition (smelting analysis) of alloy shall
comply with the stipulations in Table 5.
5.1.2 The allowable deviations of chemical composition of finished sheets and strips
shall comply with the stipulations of GB/T 15007.
5.2 Smelting Method
Unless it is otherwise stipulated in the contract, smelting method shall be
independently selected by the supply-side.
7.2 Principle of Group Batch
Sheets and strips shall receive acceptance inspection by batches. Each batch shall be
constituted of sheets and strips 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 sheets and strips 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 sheets or strips (including sheets and strips
in the previous inspection), take a double size of samples for re-inspection. The re-
inspection results shall all comply with the requirements of this Standard. Otherwise,
this batch of sheets or strips shall be determined as disqualified. The supply-side is
allowed to re-conduct thermal treatment of the sheets or strips 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 the inspection of surface quality, dimensions and shape is disqualified,
then, the individual piece (or coil) of sheet or strip shall be determined as disqualified.
8 Packaging, Marking and Quality Certificate
The packaging, marking and quality certificate of sheets and strips shall comply with
the stipulations of GB/T 247.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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