GB/T 15008-2020 English PDF (GBT15008-2020)

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GB/T 15008-2020: Corrosion-resistant alloy bars
GB/T 15008-2020
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.60
H 59
Replacing GB/T 15008-2008
Corrosion-Resistant Alloy Bars
ISSUED ON. MARCH 31, 2020
IMPLEMENTED ON. OCTOBER 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Classification ... 8
4 Order Content ... 8
5 Size, Shape and Weight ... 9
6 Technical Requirements ... 9
7 Test Methods ... 16
8 Inspection Rules ... 17
9 Packaging, Marking and Quality Certificates ... 17
Appendix A (Informative) Comparison of Domestic and Foreign Corrosion-
Resistant Designations ... 18
Corrosion-Resistant Alloy Bars
1 Scope
This Standard specifies the classification, order content, size, shape, weight, technical
requirements, test methods, inspection rules, packaging, marks and quality certificates
of corrosion-resistant alloy bars.
This Standard is applicable to iron-nickel-based, nickel-based, and nickel-copper-
based hot-rolled bars (hereinafter referred to as bars) with a nominal diameter no
greater than 150mm used in corrosive media.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
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 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N-
Benzoy-N-Phenylhydroxylamine Extraction Photometric Method for the
Determination of Vanadium Content
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 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Thiosulfate Separation Iodimetric 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 223.28 Methods for Chemical Analysis of Iron, Steel and Alloy - The α-
Benzoinoxime Gravimetric Method for the Determination of Molybdenum Content
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 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy - The Butyl
Acetate Extraction Photometric Method for the Determination of Phosphorus
Content
GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
(Potassium) Periodate Photometric Method for the Determination of Manganese
Content
GB/T 223.73 Iron Steel and Alloy - Determination of Iron Contents - Titanium
Trichloride-Potassium Dichromate Titration Method
GB/T 223.75 Iron Steel and Alloy - Determination of Boron Content - Methanol
Distillation-Curcumin Photometric Method
GB/T 223.79 Iron and Steel - Determination of Multi-Element Contents - X-Ray
Fluorescence Spectrometry (Routine Method)
GB/T 223.85 Steel and Iron - Determination of Sulfur Content - Infrared Absorption
Method after Combustion in an Induction Furnace
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
YS/T 325.2 Methods for Chemical Analysis of Nickel-Copper Alloy - Part 2.
Determination of Copper Content - Electrolysis Weight Method
3 Classification
3.1 Corrosion-resistant alloys are classified as follows.
a) An iron-nickel-based alloy with nickel content of 30% to 50%, and the sum of
nickel content and iron content of no less than 60%;
b) Nickel-based alloys with nickel content of no less than 50%;
c) Nickel-copper alloy with nickel content of no less than 50%, and a sum of nickel
content and copper content of no less than 90%.
3.2 Bars are divided into the following two categories according to the used processing
methods.
a) Steel for pressure processing - UP;
b) Steel for cutting – UC.
The used processing method of the bar material shall be specified in the contract; if
not specified, it shall be the steel for cutting processing.
4 Order Content
The contract or order placed according to this Standard shall include the following.
a) The number of this Standard;
b) Product name;
c) Designation (or unified digital code);
d) The delivered weight (or quantity);
e) specifications;
f) Processing method (if not specified, as per cutting steel);
g) Smelting method (see 6.2);
h) Delivery status;
i) Special requirements (see 6.8).
6.2 Smelting method
Unless otherwise specified in the contract, the smelting method shall be chosen by the
supplier.
6.3 Delivery status
Bars shall be delivered in hot-rolled or solid-solution status; or delivered in peeling,
turning, polishing status after hot-rolled or solid-solution. The specific delivery status is
indicated in the contract.
6.4 Mechanical properties
6.4.1 For the bars delivered in the hot-rolled state, the mechanical properties of the
sample blank after solution treatment shall comply with the provisions of Table 2.
6.4.2 For the bars delivered in solution treatment state, cut samples from the delivered
bars for inspection; the mechanical properties indicators shall conform to the provisions
of Tables 2 and 3. But for bars with a diameter greater than 80mm, the mechanical
properties indicators are determined through negotiation between the supplier and the
purchaser.
6.4.3 For aging-strengthened alloys, cut the sample blank on the bar in the delivery
state; and the mechanical properties after aging treatment shall conform to the
provisions of Table 3. NS4301's high-temperature endurance performance shall
conform to the provisions of Table 4.
6.4.4 The diameter of the sample blank is 25mm. When the diameter of the bar is below
25mm, conduct the solution treatment on the bars with the original diameter to make
a sample for inspection.
6.4.5 The performance indicators in Table 2 are applicable to bars with a diameter no
greater than 80mm. Bars with a diameter greater than 8...