GB/T 38689-2020 PDF in English
GB/T 38689-2020 (GB/T38689-2020, GBT 38689-2020, GBT38689-2020)
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Corrosion-resistant alloy cold-rolled sheets and strips
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GB/T 38689-2020: PDF in English (GBT 38689-2020) GB/T 38689-2020
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 59
Corrosion-resistant Alloy Cold-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 ... 13
6 Test Methods ... 11
7 Inspection Rules ... 11
8 Packaging, Marking and Quality Certificate ... 12
Appendix A (informative) Recommended Thermal Treatment Temperatures for
Corrosion-resistant Alloy Designations ... 13
Corrosion-resistant Alloy Cold-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 cold-rolled sheets and strips.
This Standard is applicable to nickel-based, iron-nickel-based, pure nickel and nickel-
copper-based corrosion-resistant alloy cold-rolled wide strips, and shear sheets and
slitting strips with a nominal thickness of 0.1 mm ~ 5.0 mm and a nominal width of not
less 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 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
4.1.1 The thickness and allowable deviations of sheets and strips (excluding narrow
strips) shall comply with the stipulations in Table 1.
2) When the nominal thickness is more than 1.0 mm, side wave shall be not
more than 0.02.
c) Side wave of strips delivered under the cold-working hardening state shall be
determined by the demand-side and the supply-side through negotiation.
4.8 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.
4.9 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 9.
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.
5.5 Average Grain Size
The average grain size of NS1102, NS1104, NS1106, NS1502, NS3201, NS3202,
NS3203, NS3304, NS3305, NS3308, NS3309, NS3311, NS3312 and NS3313 alloy
sheets and strips, which are delivered under the solution state, shall comply with the
stipulations in Table 10.
5.6 Surface Quality
5.6.1 The surface of sheets and strips shall be clean; there shall be no defects like
cracks, bubbles, scarring, peeling, folding and inclusions, etc. In addition, on the sides
of sheets and strips, there shall be no visible delamination. After pickling, the surface
of the delivered sheets and strips shall not have oxide scales or over-pickling.
5.6.2 On the surface of sheets and strips, slight and partial defects which are not more
than half of the thickness tolerance, such as: spots, pits, indentations, wrinkles and
rough roller markings are allowed. However, the minimum thickness of the sheets or
strips shall be guaranteed. Any defects exceeding the above-mentioned stipulations
may be removed through the method of grinding. The area of removal shall be smooth
and without any edges. The depth of allowable defects on the surface and the depth
of partial cleaning shall not exceed the minimum allowable thickness of the sheets or
strips.
5.7 Special Requirements
In accordance with the demand-side’s requirements, through the negotiation between
the demand-side and the supply-side, and statement in the contract, special technical
requirements may be specified in the chemical composition and chemical properties
ensure that the delivered sheets and strips 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
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 14.
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 properties, average
grain size, hardness, endurance, 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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