Passer aux informations produits
1 de 12

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 29197-2012 English PDF (GBT29197-2012)

GB/T 29197-2012 English PDF (GBT29197-2012)

Prix habituel $280.00 USD
Prix habituel Prix promotionnel $280.00 USD
Promotion Épuisé
Frais d'expédition calculés à l'étape de paiement.
Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB/T 29197-2012
Historical versions: GB/T 29197-2012
Preview True-PDF (Reload/Scroll if blank)

GB/T 29197-2012: Copper-clad aluminum wire
GB/T 29197-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 33.120.10
L 26
Copper-clad aluminum wire
铜包铝线
ISSUED ON: DECEMBER 31, 2012
IMPLEMENTED ON: JUNE 01, 2013
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Classification and models ... 4
4 Requirements ... 5
5 Test methods ... 8
6 Inspection rules ... 11
7 Packaging, marking, transportation and storage ... 13
8 Contents of order contract ... 14
Appendix A (Normative) Metallographic microscopy ... 16
Appendix B (Normative) Tensile strength and elongation at break test ... 18
Copper-clad aluminum wire
1 Scope
This Standard specifies the product classification, model, requirements, test methods,
inspection rules, packaging, marking, transportation and storage of copper-clad
aluminum wire.
This Standard applies to bare round copper-clad aluminum wires for electricians. The
typical use of the copper-clad aluminum wire is the inner conductor of the radio
frequency coaxial cable; other uses are also available.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies to this document. For
undated references, the latest edition (including any amendment) applies to this
document.
GB/T 3048.2-2007, Test methods for electrical properties of electric cables and wires
- Part 2: Test of electrical resistivity of metallic materials (IEC 60468:1974, MOD)
GB/T 4909.2, Test methods for bare wires - Part 2: Measurement of dimensions
GB/T 4909.5, Test methods for bare wires - Part 5: Bend test - Reverse bend test
IEC 61196-1-310, Coaxial communication cables - Part 1-310 Mechanical test
methods - Test for torsion characteristics of copper-clad metals
3 Classification and models
3.1 Classification
Copper-clad aluminum wires are divided into the following six categories according to
the copper layer volume ratio (10%, 15%, 20%) and the soft or hard state (soft state A,
hard state H):
10A – soft copper-clad aluminum wire with a copper layer volume ratio of 10%;
10H – hard copper-clad aluminum wire with a copper layer volume ratio of 10%;
15A – soft copper-clad aluminum wire with a copper layer volume ratio of 15%;
15H – hard copper-clad aluminum wire with a copper layer volume ratio of 15%;
20A – soft copper-clad aluminum wire with a copper layer volume ratio of 20%;
20H – hard copper-clad aluminum wire with a copper layer volume ratio of 20%.
3.2 Model and marker
3.2.1 Model
The model of copper-clad aluminum wire consists of type code (CCA), category code
(10A, 10H, 15A, 15H, 20A, 20H) and nominal diameter (mm).
Represented as follows:
3.2.2 Product marker
The product marker consists of name, model and the number of this Standard.
Example: soft copper-clad aluminum wire with a nominal diameter of 2.50 mm and a
copper layer volume ratio of 15% is represented as: copper-clad aluminum wire CCA-
15A-2.50 GB/T 29197-2012
4 Requirements
4.1 Appearance
The surface of the copper-clad aluminum wire shall be smooth and round, and shall be
free of dents, scratches, bamboo joints, bubbles, cracks, exposed aluminum, and any
defects that affect use.
4.2 Diameter
The diameter of the copper-clad aluminum wire shall meet the requirements in Table 1.
4.3 Copper layer thickness
The copper layer thickness of the copper-clad aluminum wire shall meet the following
requirements:
a) For 10A and 10H copper-clad aluminum wires, the thinnest thickness shall not be
less than 1.75% of the nominal diameter;
b) For 15A and 15H copper-clad aluminum wires, the thinnest thickness shall not be
less than 2.5% of the nominal diameter;
c) For 20A and 20H copper-clad aluminum wires, the thinnest thickness shall not be
less than 3.5% of the nominal diameter.
4.4 Copper layer volume ratio
The copper layer volume ratio of the copper-clad aluminum wire shall meet the
following requirements:
a) For 10A and 10H copper-clad aluminum wires, the copper layer volume ratio shall
be no less than 8% and no more than 12%;
b) For 15A and 15H copper-clad aluminum wires, the copper layer volume ratio shall
be no less than 13% and no more than 17%;
c) For 20A and 20H copper-clad aluminum wires, the copper layer volume ratio shall
be no less than 18% and no more than 22%.
4.5 DC resistivity
The DC resistivity of the copper-clad aluminum wire at 20°C shall meet the
requirements in Table 2.
mm, visually inspect the appearance quality; for copper-clad aluminum wires with a
nominal diameter less than 1.50 mm, use a magnifying glass with a magnification of no
more than 10 times to inspect the appearance quality. When necessary, use other
appropriate methods agreed upon by the manufacturer and the user to check.
5.2 Diameter
The diameter of the copper-clad aluminum wire shall be measured according to the
provisions of GB/T 4909.2.
5.3 Copper layer thickness
For copper-clad aluminum wires with a nominal diameter greater than or equal to 2.00
mm, use metallographic sandpaper to grind and polish the cross-section, to meet the
mirror surface requirements; use a reading microscope greater than 20 times to measure
the thinnest copper layer thickness.
For copper-clad aluminum wires with a nominal diameter of less than 2.00 mm, the
thinnest copper layer thickness shall be measured in accordance with the provisions of
Appendix A.
5.4 Copper layer volume ratio
Measure the diameter of copper-clad aluminum wire according to the provisions of 5.2.
According to the provisions of 5.3, measure the copper layer thickness at the four
mutually perpendicular positions shown in Figure 1, which shall include the thinnest
part of the copper layer.
Use the average of the measurements at four locations to calculate the average thickness
of the copper layer.
Figure 1 – Measurement of average copper layer thickness
Calculate the copper layer volume ratio according to Formula (1):
Where:
r – copper layer volume ratio;
d – diameter of the copper-clad aluminum wire, in millimeters (mm);
t – average copper layer thickness, in millimeters (mm).
5.5 DC resistivity
The DC resistivity of the copper-clad aluminum wire is calculated by measuring the
DC resistance.
DC resistance measurement shall be carried out according to the provisions of GB/T
3048.2-2007. When the test temperature is not 20 °C, it shall be corrected to the
resistance value at 20 °C according to Formula (9) in GB/T 3048.2-2007, where the
temperature coefficient of resistance at 20 °C is 0.004055/°C (10A, 10H), 0.004049/°C
(15A, 15H), 0.004042/°C (20A, 20H).
The DC resistivity shall be calculated according to Formula (2):
Where:
ρ – DC resistivity, in ohm square millimeters per meter (Ω·mm2/m);
R – DC resistance, in ohms (Ω);
S – cross-sectional area, in square millimeters (mm2);
l – length, in meters (m).
5.6 Tensile strength and elongation at break
The tensile strength and elongation at break of copper-clad aluminum wire shall be
tested according to the provisions of Appendix B. When the elongation at break is less
than the specified value and the break point appears within 25 mm from the chuck of
the testing machine or the gauge length of the extensometer, the ...
Afficher tous les détails