GB/T 24186-2022 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 24186-2022 | English | 230 |
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High strength abrasion resistant steel plate, sheet and strip for construction machine
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| GB/T 24186-2009 | English | 70 |
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High strength abrasion resistant steel plates for construction machine
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GB/T 24186-2022: High strength abrasion resistant steel plate, sheet and strip for construction machine
---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/GBT24186-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
CCS H 46
Replacing GB/T 24186-2009
High strength abrasion resistant steel plate, sheet and strip
for construction machine
Issued on. OCTOBER 12, 2022
Implemented on. MAY 01, 2023
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 representation method... 7
5 Ordering content... 7
6 Size, shape, weight... 8
7 Technical requirements... 9
8 Test methods... 14
9 Inspection rules... 14
10 Packaging, marks and quality certificate... 15
Annex A (informative) Chemical composition of TiC reinforced steel... 16
1 Scope
This document specifies the designation representation method, ordering content, size,
shape, weight, technical requirements, test methods, inspection rules, packaging, marks
and quality certificates for high strength abrasion resistant steel plate, sheet and strip
for construction machine.
This document applies to single-rolled steel plates with a thickness not greater than
120mm, steel sheets and strips and sheared steel plates with a thickness not greater than
25.4mm (hereinafter referred to as "steel plates, sheets and strips") for abrasion-
resistant structural components of engineering machinery such as mining machinery,
construction machinery and agriculture machinery. This document can be used as
reference for the abrasion-resistant steel plates, sheets and strips used in other fields.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 222, Permissible tolerances for chemical composition of steel products
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 223.9, Iron, steel and alloy - Determination of aluminium 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 223.23, Iron, steel and alloy - Determination of nickel content - The
dimethylglyoxime spectrophotometric method
GB/T 223.26, Iron, steel and alloy - Determination of molybdenum content - The
thiocyanate spectrophotometric method
GB/T 223.60, Methods for chemical analysis of iron, steel and alloy - The perchloric
acid dehydration gravimetric method for the determination of silicon content
GB/T 223.63, Iron, steel and alloy - Determination of manganese content - Sodium
(potassium) periodate spectrophotometric method
GB/T 223.68, Methods for chemical analysis of iron, steel and alloy - The potassium
iodate titration method after combustion in the pipe furnace for the determination of
sulfur content
3 Terms and definitions
This document does not have terms and definitions that need to be defined.
4 Designation representation method
The designation of steel consists of two parts. the first letter of the Chinese pinyin "NM"
for "abrasion resistant" and the specified surface Brinell hardness value.
5 Ordering content
The contract or order for ordering according to this document shall include the
following contents.
6 Size, shape, weight
6.1 The thickness range of each designation shall comply with the provisions in Table 1.
6.2 The size, shape, weight and allowable deviation of steel plates, sheets and strips
shall comply with the provisions of GB/T 709-2019.The thickness tolerance of
continuous rolling steel plates shall be in accordance with the provisions in Table 4 of GB/T 709-2019.
6.3 The roughness of single-rolled steel plates can be according to category H of GB/T
709-2019.
7 Technical requirements
7.1 Designation and chemical composition
7.1.1 The designation and chemical composition (smelting analysis) of the steel shall
comply with the provisions in Table 2 or Table 3.
7.1.2 Under the premise of ensuring the properties of the steel, the Cr, Ni, and Mo
alloying elements specified in Table 2 and Table 3 can be added alone or in combination.
Other alloying elements other than those specified in Table 2 and Table 3 can also be
7.1.3 When Cu is used as a residual element in steel, its content shall not exceed 0.30%.
The As content shall not exceed 0.08%. If the supplier can guarantee it, no analysis is required.
7.1.4 The carbon equivalent of steels that require low temperature toughness shall meet
the requirements in Table 3.See formula (1) for carbon equivalent calculation.
7.1.5 When the total aluminum (Alt) content is used for calculation, the Alt content
shall not be less than 0.015%.
7.1.6 Agreed by the supplier and the purchaser and indicated in the contract, see Annex
A for the chemical composition of the TiC reinforced steel.
7.1.7 When the purchaser requires analysis of the chemical composition of the finished
product, the allowable deviation of the chemical composition of the finished product
shall comply with the provisions of GB/T 222.
7.2 Smelting method
Steel is smelted by converter or electric furnace. Carry out the refining outside the furnace.
7.3 Delivery condition
The steel is delivered in the condition of quenching, quenching + tempering, TMCP +
tempering, or in the condition of hot rolling (steel in the condition of hot rolling before heat treatment).
7.4 Mechanical and process properties
7.4.1 Hardness test
The surface Brinell hardness of steel plates, sheets and strips shall meet the
requirements in Table 4.When the purchaser has requirements for the Brinell hardness
of the center of the section, the requirements in Table 4 can be referred to after
negotiation between the supplier and the purchaser.
7.4.2 Charpy (V-notch) impact test
7.4.2.1 The Charpy (V-notch) impact test of steel plates, sheets and strips that require
low-temperature toughness shall comply with the provisions in Table 5.
7.4.2.2 The Charpy (V-notch) impact absorbed energy is calculated as the arithmetic
mean of three specimens. One of the specimen values is allowed to be lower than the
7.4.3 Tensile test
Agreed by the supplier and the purchaser and indicated in the contract, the transverse
tensile test can be carried out for steel plates, sheets and strips with a thickness not
greater than 80mm. The test results can refer to the regulations in Table 6.
7.4.4 Bending test
Agreed by the supplier and the purchaser and indicated in the contract, the bending test
can be carried out on steel plates, sheets and strips that require bending. The test results
shall meet the requirements in Table 7.
7.4.5 The mechanical and technological properties of TiC reinforced steel plates, sheets
and strips can be determined through negotiation between the supplier and the purchaser.
7.4.6 Steel plates, sheets and strips delivered in hot-rolled condition are not subjected
to the mechanical property test. If the purchaser has special requirements, both parties
can negotiate.
7.5 Surface quality
7.5.1 There shall be no defects such as cracks, bubbles, scars, folds and inclusions on
the surface of steel plates, sheets and strips. There shall be no visible delamination. If
there are surface defects above, it is allowed to clean. The cleaning depth is calculated
from the actual size of the steel plate.
7.5.3 Steel plates, sheets and strips shall not be repaired by welding.
7.5.4 Agreed by the supplier and the purchaser and indicated in the contract, the surface
quality of steel plates, sheets and strips can meet the requirements of GB/T 14977.
7.6 Non-destructive testing
Agreed by the supplier and the purchaser and indicated in the contract, the internal
quality of steel plates, sheets and strips can be inspected by non-destructive testing
methods. The testing standards and qualification levels shall be specified in the contract.
8 Test methods
8.1 The chemical composition test method of steel shall be carried out according to
GB/T 4336, GB/T 20123, GB/T 20125 or other common test methods. Arbitration is
according to GB/T 223.3, GB/T 223.9, GB/T 223.11, GB/T 223.17, GB/T 223.23, GB/T
223.26, GB/T 223.60, GB/T 223.63, GB/T 223.68, GB/T 223.69, GB/T 223.78, GB/T 223.79.
8.2 For surface Brinell hardness specimens, a reasonable method shall be used to
remove the decarburized layer.
8.3 The inspection items, sampling quantity, sampling method and test method of steel
plates, sheets and strips shall comply with the provisions in Table 8.
9 Inspection rules
9.1 Steel plates, sheets and strips shall be accepted in batches. Each batch consists of
steel plates, sheets and strips with the same designation, same furnace number, same
thickness, same delivery condition, and same heat treatment system.
9.2 The sampling quantity and sampling method of steel plates, sheets and strips shall
comply with the provisions in Table 8.
9.3 The re-inspection and determination rules of inspection items for steel plates, sheets
and strips shall comply with the provisions of GB/T 17505.
9.4 The test results of chemical composition and mechanical properties are compared
according to the numerical rounding value. The rounding rules shall comply with the
provisions of GB/T 8170.
10 Packaging, marks and quality certificate
The packaging, marks and quality certificates of steel plates, sheets and strips shall
comply with the provisions of GB/T 247.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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