YS/T 67-2018 English PDF (YST67-2018)

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YS/T 67-2018: Wrought aluminium and aluminium alloy billets
YS/T 67-2018
YS
NON-FERROUS METAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
H 61
Replacing YS/T 67-2012
Wrought Aluminum and Aluminum Alloy Billets
ISSUED ON: APRIL 30, 2018
IMPLEMENTED ON: SEPTEMBER 01, 2018
Issued by: Ministry of Industry and Information Technology of the People’s
Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms ... 6
4 Requirements ... 6
5 Test Methods ... 12
6 Inspection Rules ... 15
7 Marking, Packaging, Transportation, Storage and Quality Certificate ... 17
8 Contents of Order Form (or Contract) ... 19
Appendix A (Informative) Quality Assurance ... 20
Appendix B (Informative) Typical Homogenization Effect Diagram of Aluminum Alloy
... 23
Bibliography ... 26
Wrought Aluminum and Aluminum Alloy Billets
1 Scope
This Standard specifies the requirements, test methods, inspection rules, marking, packaging,
transportation, storage and quality certificate and order (or contract) content of wrought
aluminum and aluminum alloy billets.
This Standard applies to billets (hereinafter referred to as billets) of wrought aluminum and
aluminum alloys (except 4××× series alloys) for processing such as extrusion and forging.
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) is applicable to this
Document.
GB/T 3190 Wrought aluminum and aluminum alloy - Chemical composition
GB/T 3199 Wrought aluminum and aluminum alloy products - Packing, marking,
transporting and storing
GB/T 3246.1 Inspection method for structure of wrought aluminum and aluminum alloy
products - Part 1: Inspection method for microstructure
GB/T 3246.2 Inspection method for structure of wrought aluminum and aluminum alloy
products - Part 2: Inspection method for macrostructure
GB/T 7999 Optical emission spectrometric analysis method of aluminum and aluminum
alloys
GB/T 8005.1 Aluminum and aluminum alloy terms and definitions - Part 1: Product and
method of processing and treatment
GB/T 8170 Rules of rounding off for numerical values and expression and judgement of
limiting values
GB/T 17432 Methods for sampling for analyzing the chemical composition of wrought
aluminum and aluminum alloys
mass fractions".
5.1.4 The rounding comparison method is used to determine the analytical value. The numerical
rounding rules are in accordance with the relevant provisions of GB/T 8170. The rounding
digits shall be consistent with the limit digits specified in GB/T 3190.
5.2 Purity
5.2.1 Hydrogen content
5.2.1.1 The hydrogen content can be detected by online liquid hydrogen measurement or solid-
state hydrogen measurement. Solid-state hydrogen measurement shall be used during
arbitration analysis.
5.2.1.2 The test method for liquid hydrogen measurement shall be carried out in accordance
with the provisions of YS/T 600.
5.2.1.3 The test method for solid-state hydrogen measurement shall be carried out in accordance
with the provisions of Appendix B in GB/T 33911-2017.
5.2.2 Slag content
The test method for slag content is carried out in accordance with the corresponding test
methods given in GB/T 32186-2015.
5.3 Dimensional-deviation
5.3.1 Dimension rounding
Dimensional measurements do not allow for rounding.
5.3.2 Outer and inner diameters
5.3.2.1 The outer diameter shall be measured anywhere between or on both end faces of the
billet by measuring tools of corresponding accuracy.
5.3.2.2 The inner diameter shall be measured on both ends of the billet by measuring tools of
corresponding accuracy.
5.3.3 Length
Use measuring tools of appropriate accuracy for measurements.
5.3.4 Curvature
Use a 1000 mm long ruler and place it against the surface of the billet along the length direction.
Then use a measuring tool of corresponding accuracy to measure the maximum gap (h1)
between the billet and the ruler. This value (h1) is the curvature of the billet on a length of 1000
5.4 Macrostructure
The test method of macrostructure shall be carried out in accordance with the provisions of
GB/T 3246.2.
5.5 Microstructure
The test method of microstructure shall be carried out in accordance with the provisions of
GB/T 3246.1.
5.6 Appearance quality
Visually inspect the appearance quality under natural scattered light. If necessary, the size of
the defect can be defined by a dimensional measuring tool; and the depth of the defect can be
measured through grinding.
6 Inspection Rules
6.1 Inspection and acceptance
6.1.1 The billets shall be inspected by the supplier to ensure that the quality of the billets
complies with the provisions of this Standard and the order form (or contract); and a quality
certificate shall be filled out.
6.1.2 The purchaser shall inspect the billets received in accordance with the provisions of this
Standard. If the inspection results are inconsistent with the provisions of this Standard and the
order form (or contract), it shall be submitted to the supplier in written, and the matter shall be
resolved through negotiation between the supplier and the purchaser. Objections related to
appearance quality and dimensional deviations shall be raised within one month from the date
of receipt of the billets. Objections related to the structure and performance shall be raised
within three months from the date of receipt of the billets. If arbitration is needed, it can be
entrusted to an organization recognized by both the supplier and the purchaser, and sampling
can be done jointly at the purchaser side.
6.2 Batching
Billets shall be submitted for acceptance in batches; and each batch shall be composed of billets
of the same casting time and specifications.
6.3 Weighting
Products should be checked for weight.
6.4 Inspection items
Each batch of billets shall be inspected for chemical composition, dimensional deviation,
6.6 Judgment of inspection results
6.6.1 If the chemical composition of any specimen is unqualified, the batch of billets shall be
deemed to be unqualified.
6.6.2 If the hydrogen content or slag content of any specimen is unqualified, the batch of billets
shall be deemed to be unqualified.
6.6.3 If the dimensional deviation of any billet is unqualified, the billet shall be deemed to be
unqualified. Other billets shall be inspected one by one and those that pass shall be delivered.
6.6.4 When the macrostructure of any specimen is unqualified, the judgment shall be as follows:
a) If the oxide film is unqualified, the batch of billets shall be deemed to be unqualified.
b) If the specimen is unqualified due to unqualified non-metallic inclusions, looseness,
coarse compounds, or compound segregation, 400mm from both ends of the billet
represented by the specimen shall be cut; and then resample for repeated test. Only 1
repeat test is allowed. When the repeated test results are all qualified, other billets in the
batch shall be delivered after cutting off 400mm from both ends. If any specimen is
unqualified as a result of repeated test, the batch of billets shall be deemed to be
unqualified.
c) If the specimen is unqualified due to other defects, resample and repeat the test. When
the repeated test results are all qualified, other billets in the ...