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GB/T 238-2013: Metallic materials -- Wire -- Reverse bend test
Status: Valid GB/T 238: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 238-2013 | English | 189 |
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3 days [Need to translate]
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Metallic materials -- Wire -- Reverse bend test
| Valid |
GB/T 238-2013
|
| GB/T 238-2002 | English | 319 |
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3 days [Need to translate]
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Metallic materials – Wire -- Reverse bend test
| Obsolete |
GB/T 238-2002
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| GB/T 238-1984 | English | 199 |
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2 days [Need to translate]
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Metallic materials-wire-reverse bend test
| Obsolete |
GB/T 238-1984
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PDF similar to GB/T 238-2013
Basic data | Standard ID | GB/T 238-2013 (GB/T238-2013) | | Description (Translated English) | Metallic materials -- Wire -- Reverse bend test | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H23 | | Classification of International Standard | 77.040.10 | | Word Count Estimation | 8,861 | | Older Standard (superseded by this standard) | GB/T 238-2002 | | Adopted Standard | ISO 7801-1984; MOD | | Regulation (derived from) | National Standards Bulletin 2013 No. 17 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies: metal wire repeated bending test methods principles, symbols, test equipment, specimens, test procedures and test reports. This standard applies to: diameter or characteristic dimension of 0. 3mm ~ 10mm-Metal Wire repeated bending | GB/T 238-2013: Metallic materials -- Wire -- Reverse bend test---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Metallic materials. Wire. Reverse bend test
ICS 77.040.10
H23
National Standards of People's Republic of China
Replacing GB/T 238-2002
Metal wire material
Repeated bending test method
(ISO 7801. 1984, MOD)
Issued on. 2013-09-06
2014-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 238-2002 "metal material wire repeated bending test method", the following were the main technical content
modify.
--- Deleted Table 1. Symbol "a" and instructions. Adjust the symbol "h" and explained, since the steel product standards, the symbol "h"
Usually it refers to the height of the shaped wire, and therefore represents a cylindrical support roller lever from the bottom to the top of the symbol "h" changed to "L". with
In Table 1, increased the tension symbol "T" and instructions.
--- Added Figure 1 Typical non-circular cross-sectional view a sample.
--- Table 2 has been modified, re-division of the first column of the circular wire nominal diameter range.
--- Added Appendix A.
--- Provisions straightening samples were added.
--- Provisions applying tension were added.
--- Modify the termination criterion of the test part.
This standard uses redrafted law revision using ISO 7801. 1984 "metal material wire repeated bending test method."
This standard and ISO 7801. 1984 technical differences and the reasons are as follows.
--- Deleted Table 1. Symbol "a" and instructions. Adjust the symbol "h" and explained, since the steel product standards, the symbol "h" through
Often refers to the height of shaped wire, and therefore represents a cylindrical support roller lever from the bottom to the top of the symbol "h" changed to "L". Simultaneously
In Table 1, increased the tension symbol "T" and instructions for use.
--- Added Figure 1 typical sample of non-circular cross-sectional view for ease of use.
--- Table 2 has been modified, re-division of the nominal diameter range of the first column of circular wire, for ease of use.
--- Increases repeated bending test parameters Appendix A non-circular wire, for ease of use.
--- Provisions straightening samples were added to improve the operability of the test.
--- Provisions applying tension were added in order to improve the operability of the test.
--- Modify the test termination criterion in part, is determined to improve the operability.
The standard proposed by China Iron and Steel Association.
This standard by the National Steel Standardization Technical Committee (SAC/TC183) centralized.
This standard was drafted. Wuhan Iron and Steel (Group) Company, National Metal Products Quality Supervision and Inspection Center of Metallurgical Industry Information Standards Institute
Study hospital.
The main drafters of this standard. IRON coating should macros, Tao, Dong Li, Liu Dong, Chen Shihua, Rencui Ying.
This standard replaces the previous version of the standard release of case.
--- GB/T 238-1955, GB/T 238-1963, GB/T 238-1982, GB/T 238-1984, GB/T 238-2002.
Metal wire material
Repeated bending test method
1 Scope
This standard specifies the test methods for metal wire repeated bending principles, symbols, test equipment, samples, test procedures and test reports.
This standard applies to the determination of feature size or diameter plastic deformation of 0.3mm ~ 10mm metal wire repeated bending. this
Standard features listed diameter size range or may give more specific provisions in the relevant product standard.
2 Symbols and
Wire repeated bending test and symbols used are described in Table 1 and Figure 1.
Table 1 Symbols and
Symbol Description Unit
d wire diameter in mm circular
h non-circular metal wire feature size a mm
r cylindrical support roll radius mm
L Cylindrical roller support lever from the top to the bottom mm
dg lever hole diameter mm
y two cylindrical support roll axis to the plane of the top surface of the clamp block distance mm
T N tension
Nb the number of repetitive bending times
a non-circular metal wire feature size refers to the cross-sectional height of the sample, usually specified in the relevant standards, as shown in FIG.
Figure 1 A typical non-circular cross-sectional view sample
Principle 3
Repeated bending test specimen is fixed at one end, a cylindrical support roll around a predetermined radius of bend 90 °, and then bent in the opposite direction of the repeated bending
Test, as shown in Figure 2.
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