GB/T 27671-2011 English PDF (GBT27671-2011)

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GB/T 27671-2011: Copper profiles for electrical purposes
GB/T 27671-2011
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.30
H 62
Copper Profiles for Electrical Purposes
ISSUED ON: DECEMBER 30, 2011
IMPLEMENTED ON: OCTOBER 1, 2012
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 Terms and Definitions ... 5 
4 Requirements ... 5 
5 Test Methods ... 17 
6 Inspection Rules ... 19 
7 Marking, Packaging, Transportation, Storage and Quality Certificate ... 20 
8 Contract (or order sheet) Content ... 21 
Appendix A (informative) Electrical Properties of Copper and Conversion of
Resistivity and Conductivity ... 22 
Copper Profiles for Electrical Purposes
1 Scope
This Standard specifies the requirements, test methods, inspection rules, marking,
packaging, transportation, storage, quality certificate and contract (or order sheet) of
copper profiles for electrical purposes.
This Standard is applicable to copper profiles with a circumscribed circle diameter not
greater than 180 mm for electrical purposes.
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 228-2002 Metallic Materials - Tensile Testing at Ambient Temperature
GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1: Test Method
GB/T 2828.1 Sampling Procedures for Inspection by Attribute - Part 1: Sampling
Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection
GB/T 3048.2 Test Methods for Electrical Properties of Electric Cables and Wires - Part
2: Test of Electrical Resistivity of Metallic Materials
GB/T 4340.1 Metallic Materials - Vickers Hardness Test - Part 1: Test Method
GB/T 5121 (all parts) Methods for Chemical Analysis of Copper and Copper Alloys
GB/T 5231 Designation and Chemical Composition of Wrought Copper and Copper
Alloys
GB/T 8888 Wrought Heavy Non-ferrous Metal Products - Packing, Marking,
Transportation, Storing and Certificate of Quality
GB/T 23606 Copper-hydrogen Embrittlement Test Method
GB/T 26303.2 Measuring Methods for Dimensions and Shapes of Wrought Copper
and Copper Alloy - Part 2: Rod, Wire and Profile
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 Pancake
Pancake refers to a single-layer profile that is spirally wound into a thin disc, which is
like a mosquito coil in form.
3.2 Traverse Wound
Traverse wound refers to a multi-layer profile with a certain width and with each coil
wound parallel to the axis of the core.
3.3 Bunched
Bunched refers to a wound profile automatically formed by equipment actions in
accordance with a certain direction and sequence.
3.4 On Spools
On spools refers to an axial shape made of steel, wood and plastics, on which, the
profile is regularly wound layer by layer in accordance with a certain winding direction.
4 Requirements
4.1 Product Classification
4.1.1 Designation, state and specification
The designation and state of the profiles shall comply with the stipulations of Table 1.
The specification of the profiles shall comply with the stipulations of Table 2. The
circumscribed circle diameter of the product’s cross-section is not greater than 180
mm, as it is shown in Figure 1; the width b, height h and thickness s of the profiles are
shown in Figure 2.
The surface quality of the profiles shall be visually inspected.
6 Inspection Rules
6.1 Inspection and Acceptance Inspection
6.1.1 If there is no requirement in the contract (or order sheet), the profiles shall be
inspected by the supply-side’s quality inspection department to ensure that the product
quality complies with the requirements of this Standard or the contract (or order sheet).
In addition, a quality certificate shall be filled.
6.1.2 The demand-side shall inspect the received products in accordance with the
stipulations of this Standard. If the inspection result does not comply with the
stipulations of this Standard or the contract (or order sheet), it shall be submitted to the
supply-side and solved by the demand-side and the supply-side through negotiation.
Objections that belong to surface quality, dimensional deviations and geometric
tolerance shall be submitted within 1 month from the date of receipt of the product;
other objections shall be submitted within 3 months from the date of receipt of the
product. If arbitration is required, it shall be determined by the demand-side and the
supply-side through negotiation.
6.2 Group Batch
The profiles shall be submitted for acceptance inspection in batches. Each batch shall
be composed of profiles of the same designation, state, specification or figure No. The
weight of each batch shall be not greater than 2,000 kg.
6.3 Inspection Items
Each batch of profiles shall be inspected for chemical composition, dimensions and
allowable deviations, geometric tolerance, mechanical properties (excluding the
specified non-proportional extension strength), electrical properties and surface quality.
When requested by the demand-side, the inspections of the specified non-proportional
extension strength and hydrogen embrittlement shall also be carried out.
6.4 Sampling
The sampling of the profiles shall comply with the stipulations of Table 17.
6.5 Determination of Inspection Results
6.5.1 When the chemical composition is disqualified, the batch of profiles shall be
determined as disqualified.
6.5.2 When the dimensional deviations, geometric tolerance and surface quality of the
profiles are disqualified, the piece or coil shall be determined as disqualified. When the
number of disqualified pieces in each batch exceeds the acceptance quality limit, the
whole batch shall be determined as disqualified, or it shall be inspected by the supply-
side piece-by-piece or coil-by-coil, and the qualified ones may be separately delivered
in batches.
6.5.3 When there are disqualified specimens in the test results of mechanical
properties, electrical properties and copper-hydrogen embrittlement, take another
double number of specimens (one of the specimens must be taken from the piece or
coil that failed the previous inspection) from that batch of profiles for repeated tests. If
the repeated test results are all qualified, then, the whole batch of products shall be
determined as qualified. If there are still disqualified specimens in the repeated test
results, then, the batch of profiles shall be determined as disqualified, or be inspected
piece-by-piece by the supply-side, and the qualified ones may be separately delivered
in batches.
7 Marking, Packaging, Transportation, Storage and
Quality Certificate
The marking, packaging, transportation, storage and quality certificate of the profiles
shall comply with the stipulations of GB/T 8888.
8 Contract (or order sheet) Content
The contract (or order sheet) ordering the materials listed in this Standard shall include
the following contents:
a) Product name;
b) Designation;
c) State;
d) Specifications or drawings. The drawings shall clarify the special
requirements for the shapes, dimensions, tolerances, matching surface and
surface of...