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GB/T 14408-2014 English PDF (GBT14408-2014)

GB/T 14408-2014 English PDF (GBT14408-2014)

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GB/T 14408-2014: Low alloy steel castings for general engineering and structural purposes

This standard specifies the material designations, technical requirements, test methods, inspection rules, markings, packaging, storage and transportation of the low alloy steel castings for general engineering (except high temperature, pressure resistant, corrosion resistant, and wear resistant materials) and structural purposes.
GB/T 14408-2014
GB
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
ICS 77.140.80
J 31
Replacing GB/T 14408-1993
Low alloy steel castings for general
engineering and structural purposes
ISSUED ON. MAY 06, 2014
IMPLEMENTED ON. DECEMBER 01, 2014
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Material designations ... 6
4 Technical requirements ... 6
5 Test method ... 9
6 Inspection rules ... 11
7 Marking, packaging, transportation and storage ... 14
8 Additional requirements ... 15
Foreword
This standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This standard replaces GB/T 14408-1993 ?€?Low alloy steel castings for general engineering and structural purposes?€?. As compared with GB/T 14408-1993, the main technical changes of this standard are as follows.
- MAKE major change in the structure; CANCEL the Appendix A from the
original standard; MOVE some clauses from Appendix A into the standard
text; DELETE the A1 inquiry and ordering, A3 chemical composition report, and A15 inspection document clauses from the original standard;
- ADD the chemical composition spectral analysis;
- ADD two material designations. ZGD1030-1240 and ZGD1240-1450;
- As an option, ADD the requirements for impact energy absorption;
- In the reference standards, based on the update and revision of each
standard, RESERVE 11 reference standards of the original 17 standards;
DELETE 6 standards; and ADD 13 reference standards.
This standard was proposed by AND shall be under the jurisdiction of the National Foundry Standardization Technical Committee (SAC/TC 54).
The responsible drafting organizations of this standard. Shenyang Foundry Research Institute, China Yituo Group Co., Ltd.
The participating drafting organizations of this standard. Zhejiang Yurong Industry Co., Ltd., Anhui Ningguo Wear-resistant Fittings Factory, Anhui Ningguo Xinning Industrial Co., Ltd., Lanzhou Lanshi Casting Co., Ltd., Guangdong Shaozhu Group Co., Ltd.
The main drafters of this standard. Li Fengjun, Yu Bo, Li Lailong, Han Jianpu, Li Chenghu, Zhou Daohong, Zhao Ziwen, Jiang Chunhong, Liu Qiping, Guo
Yahui.
This Standard replaces the standard previously issued as follows.
- GB/T 14408-1993.
Low alloy steel castings for general
engineering and structural purposes
1 Scope
This standard specifies the material designations, technical requirements, test methods, inspection rules, markings, packaging, storage and transportation of the low alloy steel castings for general engineering (except high temperature, pressure resistant, corrosion resistant, and wear resistant materials) and structural purposes.
This standard is applicable to low alloy steel castings for general engineering and structural purposes.
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 Standard.
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 diantipyrylmethane phosphomolybdic acid gravimetric method for the
determination of phosphorus
GB/T 223.4 Alloyed steel - Determination of manganese content -
Potentiometric titration or visual titration
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 223.68 Methods for chemical analysis of iron, steel and alloy - The combustion potassium iodate volumetric method for the determination of
sulfur content
GB/T 223.69 Methods for chemical analysis of iron, steel and alloy - The gas-volumetric method for combustion in the pipe furnace for the
determination of carbon content
GB/T 228.1 Metallic materials - Tensile testing - Part 1. Method of test at room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1. Test
methods (scales A, B, C, D, E, F, G, H, K, N, T)
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1. Test methods GB/T 4336 Carbon steel and low-alloy steel - Determination of
multi-element contents - Spark discharge atomic emission spectrometric
method (routine method)
GB/T 4338 Metallic materials - Tensile testing at elevated temperature
GB/T 5613 Designation for cast steels
GB/T 5677 Radiographic testing for steel castings
GB/T 5678 Sampling methods for spectro-chemical analysis for cast alloys GB/T 6060.1 Roughness comparison specimen - Cast surfaces
GB/T 6414 Castings - System of dimensional tolerances and machining
allowances
GB/T 7233.1 Steel castings - Ultrasonic examination - Part 1. Steel castings for general purposes
GB/T 9443 Penetrant testing for steel castings
GB/T 9444 Magnetic particle testing of steel castings
GB/T 11351 Mass tolerances for castings
GB/T 16923 Normalizing and annealing of steel parts
GB/T 16924 Quenching and tempering of steel parts
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
4.5.3 Major defect welding up needs agreement from the purchase in advance. The major defect welding up shall be with such records as welding positions and ranges, AND the part with such defects shall be detected in accordance with the same standards to access whether the welding up is qualified.
4.6 Correction
The deformation of the casting can be eliminated by means of correction, AND stress relief shall be done after correction.
4.7 Heat treatment
4.7.1 Castings are subjected to heat treatment. Unless otherwise specified, the heat treatment process is determined by the supplier.
4.7.2 The commonly used heat treatment process are annealing; normalizing; normalizing + tempering; quenching + tempering.
4.7.3 Heat treatment of castings shall be carried out in accordance with the provisions of GB/T 16923 and GB/T 16924.
4.8 Surface quality
4.8.1 Casting surface roughness shall be selected in accordance with GB/T 6060.1 AND shall be indicated in the drawing or ordering contract.
4.8.2 Castings shall be trimmed of flash and burr, AND removed of casting riser. The surface shall be removed of sticky sand and scale.
4.8.3 Residual amount of riser cutting shall comply with the requirements as agreed between the supplier and the purchaser.
4.9 Defects
4.9.1 Defects that affect the performance of castings are not allowed.
4.9.2 Surface defects in the machining allowance are allowed on the machined surface.
4.9.3 The types, ranges and quantities of defects allowed on the
non-machined surface of the casting and within the casting shall be agreed upon between the supplier and the purchaser.
4.9.4 When the purchaser requires the non-destructive testing against the castings, the testing position, method and criteria are to be determined between the supplier and the purchaser, AND indicated in the drawings or contract.
Rockwell hardness test shall be carried out in accordance with the provisions of GB/T 230.1. Brinell hardness test shall be carried out in accordance with the provisions of GB/T 231.1.
5.3 Surface inspection
Casting surface roughness test shall be carried out in accordance with the provisions of GB/T 6060.1.
5.4 Geometry and size inspection
Casting geometry and size inspection shall be made by the detection tools of corresponding accuracy OR otherwise by triple coordinate measuring
instrument or crossed inspection.
5.5 Non-destructive testing
5.5.1 Penetrant testing
Casting penetration testing shall be carried out in accordance with the provisions of GB/T 9443.
5.5.2 Magnetic particle testing
Casting magnetic particle testing shall be carried out in accordance with the provisions of GB/T 9444.
5.5.3 Ultrasonic testing
Casting ultrasonic testing shall be carried out in accordance with the provisions of GB/T 7233.1.
5.5.4 Radiographic testing
Casting X or gamma radiographic testing shall be carried out in accordance with the provisions of GB/T 5677.
6 Inspection rules
6.1 Inspection procedures
Unless otherwise specified, the inspection of the casting shall be carried out by the supplier.
6.2 Inspection sites
6.6 Re-inspection
6.6.1 When the mechanical properties test results do not comply with the requirements, AND it is not caused by the reasons as listed in 6.5.3, the supplier may conduct re-inspection.
6.6.2 When the tensile test results are unqualified, two spare tensile test samples will be taken from the same batch for the test, AND if the two test results comply with the provisions of Table 2, the tensile performances of th...

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