GB/T 8263-2025 PDF English
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| GB/T 8263-2025 | English | 275 |
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Abrasion-resistant white iron castings
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| GB/T 8263-2010 | English | 75 |
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Abrasion-resistant white iron castings
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| GB/T 8263-1999 | English | 359 |
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Abrasion-resistant white iron castings
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| GB/T 8263-1987 | English | RFQ |
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Specification for abrasion resistant white cast irons
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GB/T 8263-2025: Abrasion-resistant white iron castings---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/GBT8263-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.80
CCS J 31
Replacing GB/T 8263-2010, GB/T 24597-2009
Abrasion-resistant white iron castings
Issued on: MAY 30, 2025
Implemented on: DECEMBER 01, 2025
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 7
4 Designation... 8
5 Manufacturing... 8
6 Technical requirements... 9
7 Test methods... 11
8 Inspection rules... 13
9 Marking, certification, packaging, transportation and storage... 15
Appendix A (Informative) Heat treatment process of abrasion-resistant white cast iron
castings... 17
Appendix B (informative) Microstructure of abrasion-resistant white cast iron castings
... 19
Abrasion-resistant white iron castings
1 Scope
This document specifies the designation, manufacturing, technical requirements,
inspection rules as well as marking, certification, packaging, transportation and storage
of abrasion-resistant white iron castings (hereinafter referred to as "castings"), and
describes the corresponding test methods.
This document is applicable to the production, testing, application, procurement and
delivery acceptance of abrasion-resistant white iron castings subject to abrasive wear
in the mining, metallurgy, building materials, electric power, construction, shipbuilding,
chemical and machinery industries. It serves as a reference for the implementation of
abrasion-resistant white iron castings for other working conditions.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this
document and are indispensable for its application. For dated references, only the
edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
GB/T 223.3, Methods for chemical analysis of iron, steel and alloy - The
diantipyrylmethane 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 223.11, Iron, steel and alloy - Determination of chromium content - Visual
titration or potentiometric titration method
GB/T 223.18, Methods for chemical analysis of iron steel and alloy - The sodium
thiosulfate separation iodimetric method for the determination of cupper content
GB/T 223.23, Iron, steel and alloy - Determination of nickel content - The
dimethylglyoxime spectrophotometric method
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 223.26, Iron, steel and alloy - Determination of molybdenum content - The
thiocyanate spectrophotometric method
GB/T 11351-2017, Mass tolerances of casting
GB/T 13298, Inspection methods of microstructure for metals
GB/T 15056, Casting surface roughness - Appraising method
GB/T 20066, Steel and iron - Sampling and preparation of samples for the
determination of chemical composition
GB/T 24234, Cast iron - Determination of multi-element contents - Spark discharge
atomic emission spectrometric method (Routine method)
GB/T 39428-2020, Steel castings by sand casting - Visual examination method of
surface quality
GB/T 39638, X-ray digital radiographic testing for casting
3 Terms and definitions
For the purposes of this document, the following terms and definitions, as well as those
given in GB/T 5611, apply.
3.1
abrasion-resistant white cast iron
White cast iron with good abrasion resistance, whose microstructure consists of a metal
matrix and carbides.
Note. Abrasion-resistant white cast iron is also called wear-resistant white cast iron.
3.2
nickel-chromium abrasion-resistant white cast iron
Abrasion-resistant white cast iron with nickel and chromium as the main alloying
elements.
Note. Nickel-chromium abrasion-resistant white cast iron is also called nickel-hard
cast iron.
3.3
chromium abrasion-resistant white cast iron
Abrasion-resistant white cast iron with chromium as the main alloying element.
3.4
chromium-manganese-tungsten abrasion-resistant white cast iron
Abrasion-resistant white cast iron with chromium, manganese and tungsten as the main
alloying elements.
4 Designation
The designation method of abrasion-resistant white cast iron and its castings shall
comply with the provisions of GB/T 5612.Abrasion-resistant white cast iron and its
castings shall be divided into 3 categories and 17 designations according to the types
and contents of the main alloying elements, as shown in Table 1.
5 Manufacturing
5.1 Casting
Unless otherwise agreed upon by the supplier and the buyer, the smelting method and
casting process shall be determined by the supplier.
5.2 Heat treatment
5.2.1 Castings can be supplied in the following conditions.
a) As-cast;
b) As-cast destressing;
c) Hardened state;
d) Tempering treatment in hardened state;
e) Softened annealed state.
5.2.2 The heat treatment process of castings is shown in Appendix A.
5.2.3 Unless otherwise agreed between the supplier and the buyer, the delivery status
shall be determined by the supplier.
5.3 Casting cleaning
When cleaning castings and treating casting defects, flame cutting, arc gouging cutting,
electric welding cutting and welding repair shall not be used.
6 Technical requirements
6.1 Chemical composition
The chemical composition of abrasion-resistant white cast iron and its castings shall
comply with the requirements of Table 1.
6.2 Microstructure
Unless otherwise agreed upon by the supplier and the buyer, microstructure shall not
be used as the basis for product acceptance. The microstructure of the casting is shown
in Appendix B.
6.3 Hardness
The hardness of abrasion-resistant white cast iron and its castings at room temperature
shall comply with the requirements of Table 2.If the buyer has special requirements for
hardness, it shall be determined by negotiation between the supplier and the buyer.
6.5.3 The casting surface grinding (mechanical) treatment level, surface non-metallic
inclusion level, and surface porosity level may be agreed upon by the supplier and the
buyer in accordance with the provisions of GB/T 39428-2020.
6.5.4 The surface roughness grade of castings shall comply with the requirements of
the drawings or order contracts. If not specified in the drawings or order contract, the
supplier shall select the surface roughness. The surface roughness parameters of
castings weighing less than 1 000 kg shall comply with the requirements of Ra ≤ 25 μm
in GB/T 1031-2009, or meet the requirements of BM2 in GB/T 39428-2020.The
surface roughness parameters of castings weighing 1 000 kg or more shall comply with
the requirements of Ra ≤ 100 μm in GB/T 1031-2009, or meet the requirements of BM3
in GB/T 39428-2020.
6.6 Geometric shape and dimensions
6.6.1 The geometric shape and dimensional deviation of the casting shall comply with
the requirements of the drawing or order contract.
6.6.2 Unless otherwise specified in the drawing and order contract, the dimensional
deviation of the casting shall meet the requirements of grade DCTG12 in GB/T 6414-
2017, and the geometric deviation shall comply with the requirements of grade GCTG7
in GB/T 6414-2017.
6.7 Weight
The weight deviation grade of castings shall comply with the requirements of the
drawing or order contract. If there is no stipulation in the drawing and order contract,
the casting weight deviation grade selection shall comply with the requirements for
grade MT11 in GB/T 11351-2017.
7 Test methods
7.1 Chemical composition
7.1.1 The sampling and preparation of samples for the determination of chemical
composition shall be carried out in accordance with the provisions of GB/T 20066.
When multiple packages of molten iron are used to cast a casting, each package of
molten iron shall be chemically analyzed and shall meet the corresponding technical
requirements.
7.1.2 The analytical method of chemical composition shall be carried out in accordance
with the provisions of GB/T 223.3, GB/T 223.4, GB/T 223.11, GB/T 223.18, GB/T
223.23, GB/T 223.25, GB/T 223.26, GB/T 223.28, GB/T 223.43, GB/T 223.59, GB/T
223.60, GB/T 223.64, GB/T 223.71, GB/T 223.72 and GB/T 4699.2.Analytical
methods such as spark discharge atomic emission spectrometric method and X-ray
fluorescence spectrometric method can be used. Testing by the spark discharge atomic
emission spectrometric method shall be carried out in accordance with the provisions
of GB/T 24234.When there is a dispute over the analysis results, the results of the
chemical analysis method shall prevail.
7.1.3 When it is necessary to specify residual elements, the type, content and total
amount of the residual elements shall be determined by the supplier and the buyer
through consultation.
7.2 Microstructure
Microstructure inspection shall be carried out in accordance with the provisions of
GB/T 13298.
7.3 Hardness
The Rockwell hardness test shall be carried out in accordance with the provisions of
GB/T 230.1; the Brinell hardness test shall be carried out in accordance with the
provisions of GB/T 231.1.
7.4 Internal quality
7.4.1 Ultrasonic testing of castings shall be carried out in accordance with the
provisions of GB/T 7233.1.
7.4.2 X-ray or gamma-ray radiographic testing of castings shall be carried out in
accordance with the provisions of GB/T 5677.Alternatively, X-ray digital radioscopic
examination of castings may be used in accordance with the provisions of GB/T 39638.
7.5 Surface quality
7.5.1 The surface quality inspection of castings shall be carried out in accordance with
the provisions of GB/T 39428-2020.
7.5.2 Penetrant testing of castings shall be carried out in accordance with the provisions
of GB/T 9443.
7.5.3 Magnetic particle testing of castings shall be carried out in accordance with the
provisions of GB/T 9444.
7.5.4 The casting surface roughness of castings shall comply with the provisions of
GB/T 15056.Alternatively, visual comparison inspection shall be conducted using
comparison photos, which shall comply with the surface roughness comparison photos
in Appendix C of GB/T 39428-2020.
7.6 Geometric shape and dimensions
The geometric shape and size inspection of castings shall be carried out using inspection
tools, gauge blocks, templates or markings of corresponding accuracy.
7.7 Weight
The casting weight deviation inspection shall be carried out in accordance with the
provisions of GB/T 11351-2017.
8 Inspection rules
8.1 Inspection and acceptance
8.1.1 The supplier shall inspect the castings to ensure that the product quality complies
with the provisions of this document and the order contract.
8.1.2 The buyer shall inspect the received casting in accordance with the provisions of
this document. If the inspection results are inconsistent with the provisions of this
document and the order contract, the matter shall be raised to the supplier within one
month from the date of receipt of the casting and resolved through negotiation between
the supplier and the buyer. If arbitration is required, it can be entrusted to an
organization that is recognized by both parties to conduct a joint sampling on the buyer's
side.
8.2 Division of inspection batches
8.2.1 The division of inspection batches for chemical composition shall be selected
from one of the following two ways. If the buyer has special requirements for the
inspection batches, it shall be agreed upon by the supplier and the buyer.
a) When smelting in an electric furnace, each furnace is considered as a batch.
b) When smelting in a cupola, every 2 hours is considered as a batch.
8.2.2 The division of inspection batches for other items shall be selected from one of
the following three methods. If the buyer has special requirements for the inspection
batches, it shall be agreed upon by the supplier and the buyer.
a) Batching by heat. For castings of the same type, those cast from the same
smelting furnace and heat-treated in the same heat treatment furnace shall be
one batch.
b) Batching by quantity or weight. For castings of the same designation cast from
multiple smelting furnaces under stable smelting process conditions and
subjected to multiple heat treatments using the same process shall be one batch
with a certain quantity or weight.
c) Batching by piece. For some castings with special requirements, one or several
pieces shall be one batch.
8.3 Sampling regulations
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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