GB/T 41162-2022_English: PDF (GB/T41162-2022)
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Alloy steel castings with special physical properties
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GB/T 41162-2022
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| Standard ID | GB/T 41162-2022 (GB/T41162-2022) | | Description (Translated English) | Alloy steel castings with special physical properties | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J31 | | Classification of International Standard | 77.140.80 | | Word Count Estimation | 16,112 | | Date of Issue | 2022-03-09 | | Date of Implementation | 2022-10-01 | | Drafting Organization | North China Electric Power University, Anhui Ningguo Huada Wear-resistant Materials Co., Ltd., Huaibei Wandu Industry and Trade Co., Ltd., Xi'an Thermal Research Institute Co., Ltd., Tsinghua University, Xi'an University of Technology, Xinghua Dongchang Alloy Steel Co., Ltd. , Tianjin Lixinsheng New Material Technology Co., Ltd., Hunan Electric Power Wear-resistant New Material Co., Ltd., Xinxiang Gaofu Machinery Co., Ltd., Jiangsu Haiyu Machinery Co., Ltd., Huizhou Zhuoneng Testing Technology Co., Ltd., Foshan Yifeite Electric Motor Co., Ltd., Jiangsu Lianxing Complete Equipment Manufacturing Co., Ltd., Beijing University of Technology, Hebei University of Technology | | Administrative Organization | National Foundry Standardization Technical Committee (SAC/TC 54) | | Proposing organization | National Foundry Standardization Technical Committee (SAC/TC 54) | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration |
GB/T 41162-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.80
CCS J 31
Alloy steel castings with special physical properties
(ISO 19960:2015, Cast steels and alloys with special physical properties,
MOD)
ISSUED ON: MARCH 09, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
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 Terms and definitions... 7
4 Technical requirements ... 8
5 Test methods ... 12
6 Inspection rules ... 13
7 Marks, quality certificates, packaging and storage ... 16
Annex A (informative) Comparison on chapter numbers between this document and
ISO 19960:2015 ... 18
Annex B (informative) Technical differences between this document and ISO
19960:2015 and their reasons ... 19
Annex C (informative) Comparison on designations between this document, ISO
19960:2015 and UNS ... 21
Alloy steel castings with special physical properties
1 Scope
This document specifies the material designations, technical requirements, test methods,
inspection rules and marks, quality certificates, packaging and storage for alloy steel
castings with special physical properties.
This document applies to alloy steel castings with weak magnetic properties, small
expansion coefficient and special physical properties of self-lubricating and wear-
resistant.
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 223.4, Iron, steel and alloy - 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 223.9, 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 223.11-2008, ISO 4937:1986,
MOD)
GB/T 223.14, Methods for chemical analysis of iron, steel and alloy - The N-benzoyl-
N-phenylhydroxylamine extraction photometric method for the determination of
vanadium 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 223.21, Methods for chemical analysis of iron steel and alloy - The 5-Cl-
PADAB spectrophotometric method for the determination of cobalt 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
The tensile test shall be carried out in accordance with the provisions of GB/T 228.1
and GB/T 2975.
5.3 Impact test
The impact absorption energy test is carried out according to the provisions of GB/T
229 and GB/T 2975.
5.4 Magnetic permeability test
The magnetic permeability test is carried out according to the provisions of GB/T 35690.
5.5 Coefficient of linear expansion test
The coefficient of linear expansion test is carried out according to the provisions of
GB/T 4339.
5.6 Surface quality
5.6.1 The surface quality of castings should be checked visually.
5.6.2 The surface roughness shall be carried out according to the provisions of GB/T
6060.1 and GB/T 15056.
5.7 Internal quality
5.7.1 Penetration test is carried out in accordance with the provisions of GB/T 9443.
5.7.2 Ultrasonic testing is carried out in accordance with the provisions of GB/T 7233.1
and GB/T 7233.2.
5.7.3 Radiographic testing shall be carried out in accordance with the provisions of
GB/T 5677.
5.8 Geometry, dimensional tolerances and weight tolerances
5.8.1 The geometrical shape and dimensional tolerance of castings should be checked
by selecting inspection tools, gauge blocks, templates or scribing lines with
corresponding precision. Dimensional tolerances shall be implemented in accordance
with the provisions of GB/T 6414.
5.8.2 The weight tolerance shall be implemented in accordance with the provisions of
GB/T 11351.
6 Inspection rules
6.1 Batching
Divide inspection lots in one of the following ways.
a) Batch by heat: Castings of the same designation, poured in the same heat and heat-
treated in the same heat constitute an inspection batch.
b) Batch by quantity or weight: Under the condition of stable smelting or
manufacturing process, a certain number or weight of castings of the same
designation, which are cast in multiple heats or in the same casting process and
subjected to the same heat treatment process for multiple heats, constitute an
inspection batch.
c) Batch by piece: For some with special casting process requirements, one or several
pieces constitute an inspection batch.
6.2 Chemical composition analysis
6.2.1 The chemical composition shall be inspected one by one according to the smelting
heat. Analytical samples shall be taken at least 6mm below the surface of the test block
or casting.
6.2.2 When pouring a casting in multiple packs, the analysis results of each pack should
meet the technical requirements of the selected designation.
6.3 Mechanical properties
6.3.1 The specimens for mechanical properties shall be taken from the attached casting
test block of the casting or the single casting test block of the same smelting heat. They
are heat treated in the same furnace as the castings they represent. The main dimensions
of the single cast test block and the location of the cut sample are shown in Figure 1.
6.3.2 The thickness of the attached casting test block for mechanical properties shall be
≥28mm (including the test block cut from the casting as agreed upon by both parties).
6.3.3 The additional casting position, size and quantity of the additional casting test
block shall be determined by the supplier.
6.3.4 For tensile test, take one specimen from each batch for the test. The test results
should meet the requirements of Table 2.
6.3.5 For impact absorption energy test, take three impact specimens from each batch
for the test. The average value of the three impact specimens shall meet the
requirements of Table 2. Among them, the impact value of one specimen is allowed to
be lower than the specified value and not less than 70% of the specified value.
6.3.6 If the test results do not meet the requirements of Table 2, the re-inspection shall
be carried out according to the provisions of 6.8.
6.4 Surface quality
are still accepted. If there is still one specimen rejected in the re-inspection, the supplier
shall deal with it according to 6.9.
6.8.2 Take three spare impact specimens from the same batch for testing. This result is
added to the original result to recalculate the average value. If the recalculated average
value meets the requirements in Table 2, the impact value of this batch of castings can
be judged as accepted, otherwise the supplier shall deal with it according to 6.9.
6.9 Reheat treatment
When the re-inspection results of mechanical properties do not meet the requirements
in Table 2 and the physical properties do not reach the values in Tables 3 and 4, the
castings and test blocks can be re-heated and then re-inspected. Without the consent of
the purchaser, the number of re-heat treatment shall not exceed two times.
6.10 Nondestructive testing
According to the requirements of the purchaser, castings shall be inspected by
penetration, ultrasonic or radiography. Testing methods, testing locations, acceptance
levels and acceptance criteria shall be agreed upon by both parties.
6.11 Round-off of test results
The mechanical properties and chemical composition analysis results shall be rounded
according to the principles specified in the test method or according to the provisions
of GB/T 8170.
7 Marks, quality certificates, packaging and storage
7.1 Marks
The following marks shall be made on the surface of each casting:
a) Purchaser name, address and destination;
b) Casting name, specification and designation;
c) Packing number;
d) Gross and net weight;
e) Supplier name and address;
f) When marking cannot be made on castings, the marks may be printed on labels
attached to each batch of castings.
7.2 Quality certificates
The exit-factory castings should be accompanied by the product certificate or quality
certificate issued by the inspection department, including:
a) Supplier name and address;
b) Trademark;
c) Casting name and designation;
d) Casting inspection lot number;
e) Inspection results (inspection report);
f) Casting drawing number or order contract number;
g) Standard number;
h) Exit-factory date.
7.3 Packaging and storage
7.3.1 Castings should be protected and packaged after passing the inspection.
7.3.2 Casting protection, packaging and storage should comply with the provisions of
the order contract.
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