GB/T 2529-2012 English PDF (GB/T2529-2012)

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GB/T 2529-2012: Copper sheets and bars for electrical conduction purpose
GB/T 2529-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.30
H 62
Replacing GB/T 2529-2005
Copper sheets and bars for
electrical conduction purpose
ISSUED ON. DECEMBER 31, 2012
IMPLEMENTED ON. OCTOBER 1, 2013
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 ... 5
2 Normative references ... 5
3 Term and definition ... 6
4 Requirements ... 6
5 Test methods ... 14
6 Inspection rules ... 14
7 Symbols, packaging, transportation, storage and quality certificate ... 16
8 Contents of the contract (or order form) ... 16
Foreword
This Standard is drafted according to the rules given in GB/T 1.1-2009.
The major technical specifications of the bars in this Standard reference to and
adopt the contents of the bars in ASTM B 187M-2006 Copper bars, rods and
shapes for bus bars.
This Standard replaces GB/T 2529-2005 Copper sheets and bars for electrical
conduction purpose.
Compared with GB/T 2529-2005, the major changes in this Standard are as
follows.
— ADD “TU2” and “TU3” to the alloy designations of the products.
— USE the new edition of Temper designations for copper and copper alloys
to represent the product state.
— ADD GB/T 26303.3 Measuring methods for dimensions and shapes of
wrought copper and copper alloys - Part 3. Sheets and strips, YS/T 478
The method for electrical conductivity measurement of copper and
copper alloys by use of eddy current, and YS/T 482 Methods for analysis
of copper and copper alloys - The atomic emission spectrometry to
normative references.
— DELETE “1/8 hard” from the state of the sheets and bars.
— INCREASE the maximum length of the sheets and bars from “8,000mm”
to “12,000mm”.
— DIVIDE the straightness of longitudinal edge according to the state as
required.
— ADD the requirements for rounding off to the contents of the edge
appearance.
— For the percentage elongation after fracture in the mechanical properties
of the sheets and bars, MODIFY the “long specimen A11.3” to “short
specimen A”.
— ADD the property indicators of the resistivity to the electrical property of
the sheets and bars.
— ADD the following contents. For the electrical property, USE the test
methods in YS/T 478 The method for electrical conductivity measurement
Copper sheets and bars for electrical
conduction purpose
1 Scope
This Standard specifies the requirements, test methods, inspection rules,
symbols, packaging, transportation, storage, and contents of the quality
certificate and contract (or order form) of the copper sheets and bars for
electrical conduction purpose.
This Standard is applicable to the copper sheets and bars for electrical
conduction purpose used in industrial sectors, such as smelting sector, electric
power sector, chemical sector, plating sector, etc.
2 Normative references
The following documents are essential to the application of this document. For
dated references, only the editions with the dates indicated are applicable to
this document. For undated references, only the latest editions (including all the
amendments) are applicable to this document.
GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1. Method of test
at room temperature (ISO 6892-1.2009, MOD)
GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1. Test method
GB/T 232 Metallic materials - Bend test
GB/T 351 Metallic materials - Resistivity measurement method
GB/T 4340.1 Metallic materials - Vickers hardness test - Part 1. Test method
(ISO 6507-1.2005, MOD)
GB/T 5121 (all Parts) Methods for chemical analysis of copper and copper
alloys
GB/T 5231 Wrought copper and copper alloys chemical composition limits
and forms of wrought products
GB/T 8888 Wrought heavy non-ferrous metal products - Packing, marking,
transporting and storing
GB/T 26303.3 Measuring methods for dimensions and shapes of wrought
copper and copper alloys - Part 3. Sheets and strips
YS/T 478 The method for electrical conductivity measurement of copper and
copper alloys by use of eddy current
YS/T 482 Methods for analysis of copper and copper alloys - The atomic
emission spectrometry
3 Term and definition
The following term and definition are applicable to this document.
3.1 Straightness of longitudinal edge
It refers to the deviation of the absolute straightness of any longitudinal surface
or edge, including side curvature and flatness.
4 Requirements
4.1 Product classification
4.1.1 Designations, state and specifications
4.1.1.1 The designations, state and specifications of the sheets shall conform
to the provisions in Table 1.
Table 1 Designations, State and Specifications of the Sheets
Designation State
Specifications / mm
Thickness Width Length
T2, TU2, TU3
Hot rolling (M20)
Hot rolling + rerolling (M25)
4~100
50~650 ≤ 12,000 Soft (O60)
4~20 1/2 Hard (H02)
Hard (H04)
Note. After the negotiation between supply and demanding parties, it is allowed to supply the sheets
with other designations, state and specifications.
4.1.1.2 The designations, state and specifications of the bars shall conform to
the provisions in Table 2.
4.3.3 Length and their tolerances
4.3.3.1 The lengths and their tolerances of the sheets shall conform to the
provisions in Table 8.
4.3.3.2 The lengths and their tolerances of the bars shall conform to the
provisions in Table 9.
Table 8 Lengths and Their Tolerances of the Sheets
Table 9 Lengths and Their Tolerances of the Bars
4.3.4 Straightness of longitudinal edge
The sheets shall be straight, and are allowed to have slight waves. For the
sheets and bars in M25, H02 and H04 states, the straightness of longitudinal
edge shall conform to the provisions in Table 10.
Table 10 Straightness of Longitudinal Edge of the Sheets and Bars
State Straightness of longitudinal edge, ≤
M25 4 mm/m
H02, H04 3 mm/m
4.3.5 Edge appearance
4.3.5.1 Right angle
When the edge appearance of the bars is right angle, the edges shall have no
cracks and folds. The maximum allowable chamfer radius shall conform to the
provisions in Table 11.
Unit. mm
Length of the cold-rolled sheet
Thickness
Length Tolerance (+)
Hot-rolled
sheet
Length Tolerance (+) Length
Unit. mm
Note. The arcs of the rounded edge are not necessary to be tangent to the “A” point, but they shall be
symmetric with the product axis. Furthermore, the angle’s “A” point shall be rounding off.
Figure 3 Schematic Diagram of the Full Rounded Edge
4.3.5.5 When the user has requirements on the edge appearance of the
sheets and bars, the specific shape of the corresponding edge appearance
shall be indicated in the contract. If not indicated, the sheet edges shall be in
the shapes of the sheared or sawed edges.
4.4 Mechanical property
For the products with the thicknesses of not greater than 10mm, CONDUCT the
tensile test at room temperature. For the products with the thicknesses of
greater than 10mm, CONDUCT the Vickers or Rockwell hardness test. The test
results shall conform to the provisions in Table 14.
Table 14 Mechanical Property of the Sheets and Bars
Designation Supply state
Tensile test Hardness test
Tensile
strength Rm
MPa
Percentage ...