GB/T 33241-2016 English PDF (GBT33241-2016)

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GB/T 33241-2016: Zinc-aluminum alloy coated section steel
GB/T 33241-2016
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.70
H 44
Zinc-Aluminum Alloy Coated Section Steel
ISSUED ON: DECEMBER 13, 2016
IMPLEMENTED ON: NOVEMBER 01, 2017
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Code, Model and Example ... 5
5 Ordering Contents ... 6
6 Technical Requirements ... 6
7 Test Methods ... 8
8 Inspection rules ... 9
9 Package, Marking, Quality Certificate, Handling, Stacking and Storage ... 9
Zinc-Aluminum Alloy Coated Section Steel
1 Scope
This Standard specifies the terms and definitions, codes, models and examples,
ordering contents, technical requirements, test methods, inspection rules, package,
marking, quality certificate, handling, stacking and storage of zinc-aluminum alloy
coated section steel.
This Standard is applicable to the zinc-aluminum alloy coated section steel of hot-rolled
section steel (hereinafter referred to as section steel) by the continuous hot dip plating
mode.
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 document.
GB/T 470 Zinc Ingots
GB/T 706 Hot-Rolled Section Steel
GB/T 2101 General Requirements of Acceptance, Packaging, Marking, and
Certification for Section Steel
GB/T 3082-2008 Galvanized or Zinc-5% Aluminum-Mixed Mischmetal Alloy-
Coated Low Carbon Steel Wire for Armouring Cables
GB/T 4956 Non-Magnetic Coatings on Magnetic Substrates - Measurement of
Coating Thickness - Magnetic Method
GB/T 6462 Metallic and Oxide Coatings - Measurement of Coating Thickness -
Microscopical Method
GB/T 9793 Thermal Spraying - Metallic and Other Inorganic Coatings - Zinc,
Aluminum and Their Alloys
GB/T 11263 Hot-Rolled H and cut T Section Steel
4.3 Example
The zinc-aluminum alloy coated H-shaped section steel with specification of
300mm×300mm×10mm×15mm shall be expressed as follows:
ZAHM300×300×10×15
5 Ordering Contents
The contract that orders products according to this Standard shall contain the following
main contents:
a) Product name;
b) Standard number;
c) Section steel specifications;
d) Weight or quantity;
e) Special requirements.
6 Technical Requirements
6.1 Materials
6.1.1 Base metal of section steel
The base metal of section steel shall conform to the provisions of GB/T 706 or GB/T
11263, etc.
6.1.2 Zinc-aluminum alloy ingot
The chemical composition of zinc-aluminum alloy ingot shall conform to the provisions
of YS/T 310.
6.1.3 Zinc ingot
The zinc ingot shall conform to the provisions of GB/T 470.
6.2 Coating
6.2.1 Appearance
6.2.1.1 The coating surface shall be smooth, and free of the following defects, such as
peeling, uncoated area, zinc thorn, dripping and slagging.
7.2.2.3 Cross-section method
It shall be performed as per the requirements of GB/T 6462.
7.2.3 Aluminum content in the coating
It shall be inspected as per the provisions in Appendix A of GB/T 3082-2008.
7.2.4 Adhesion test
As long as the adhesion between coating and substrate can meet the requirements of
the part under normal use and general operating conditions; generally, it is not
necessary to specifically test the bonding force between the coating and the substrate.
If the purchaser has special requirements, the supplier and the purchaser can
negotiate to determine the test methods of adhesion.
8 Inspection rules
8.1 Inspection and acceptance
The inspection and acceptance of the section steel shall be carried out by the quality
supervision department of the supplier. The purchaser reserves the right to check and
accept any inspection items specified in this Standard or contract.
8.2 Batching rules
The section steels shall be accepted in batches. Each batch consists of the section
steels with the same furnace number, the same size, and same specification. Each
batch is no more than 60t.
8.3 Sampling Locations and Sampling Quantities
The sampling locations and sampling quantities of each batch of section steels shall
conform to the provisions of Table 2.
8.4 Reinspection and judgment
The reinspection and judgment of the section steel shall conform to the provisions of
GB/T 2101.
8.5 Numerical rounding off
The numerical rounding off shall conform to the provisions of YB/T 081.
9 Package, Marking, Quality Certificate, Handling,