Iranian Classification Society Rules
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Section 6 Aluminium Alloys
601. Application
The requirements in this Section apply to the tests and inspection for the approval of manufacturing process of aluminium alloys as specified in Pt 2, Ch 1, Sec 8 of the Rules.
602. Data to be submitted
The following reference data in addition to those specified in Society.
(1) Kind of the aluminium alloys (each material grade)
(2) Kind of products (plates, extruded shapes, etc.)
(3) Melting process
(4) Forming process
102. are to be submitted to the
603. Approval test
1. Selection of test samples
(1) Test samples used for the approval test are to, as a rule, be taken in the presence of the
Surveyor from aluminium alloy plates, shapes, etc., of conditions of the melting process and forming process.
each
melt manufactured under the same
(2) The plate thickness and dimensions for the test sample
to be maximum thickness and dimensions.
2. Details of test
(1) Items of the approval test are to be as given in Table
used in the approval test are, as a rule,
2.6.1 and are to be carried out for each
factory in the presence of the Surveyor except otherwise spacially provided.
(2) Testing method and acceptance criteria are to be in accordance with the Table 2.6.2.
604. Changes in the manufacturing process
In case changes occur in the approval content among manufacturing process of aluminium alloys which have been granted approval beforehand, the followings are to be submitted to the Society.
(1) Changes in the aluminium alloy making process
(2) Changes in the ingot-making process
(3) Changes in the rolling or extruding process
(4) Changes in the limit of thickness or dimension
(5) Changes in the heat treatment process
(6) Changes in the chemical composition, added element, etc.
(7) Subletting rolling, extruding, heat treatment, etc. to outside contractors
(8) Use of blooms and billets, etc. manufactured by other company
605. Dealings after approval
Aluminium alloys which conform to the requirements in this Section are to be dealt with as [in approval case] in the requirements in Pt 2, Ch 1, 201. 2 (2) of the Rules, unless otherwise speci- fied by the Society.
28 Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015
Ch 2 Approval of Manufacturing Process Ch 2, Sec 6
Table 2.6.1 Approval Test Items for aluminium alloys
Kinds | Grades | Temper | Test items | |||||||||
Chemical analysis | Macro- structure | Micro- structure | tensile test at room temp | Tensile test at low temp.(1) | Tensile test of notched round bar(1) | Tensile test in direction of thickness(1) | bend test | tear test(1)(2) | corrosion resistance test(3) | |||
Rolled Product | 5083P | O | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | |
H112 | ○ | ○ | ○ | ○ | ○ | |||||||
H116 | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
H321 | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | |||
5086P | O | ○ | ○ | ○ | ○ | ○ | ||||||
H112 | ○ | ○ | ○ | ○ | ○ | |||||||
H116 | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
5383P | O | ○ | ○ | ○ | ○ | ○ | ||||||
H116 | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
H321 | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
5059P | O | ○ | ○ | ○ | ○ | ○ | ||||||
H116 | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
H321 | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
5456P | O | ○ | ○ | ○ | ○ | ○ | ||||||
H116 | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
H321 | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
5754P | O | ○ | ○ | ○ | ○ | ○ | ||||||
Extrude Product | 5083S | O | ○ | ○ | ○ | ○ | ○ | |||||
H111 | ○ | ○ | ○ | ○ | ○ | |||||||
H112 | ○ | ○ | ○ | ○ | ○ | |||||||
5086S | O | ○ | ○ | ○ | ○ | ○ | ||||||
H111 | ○ | ○ | ○ | ○ | ○ | |||||||
H112 | ○ | ○ | ○ | ○ | ○ | |||||||
5383S | O | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | |||
H111 | ○ | ○ | ○ | ○ | ○ | |||||||
H112 | ○ | ○ | ○ | ○ | ○ | |||||||
5059S | H112 | ○ | ○ | ○ | ○ | ○ | ||||||
6005AS | T5 | ○ | ○ | ○ | ○ | ○ | ||||||
T6 | ○ | ○ | ○ | ○ | ○ | |||||||
6061S | T6 | ○ | ○ | ○ | ○ | ○ | ||||||
6082S | T5 | ○ | ○ | ○ | ○ | ○ | ||||||
T6 | ○ | ○ | ○ | ○ | ○ | |||||||
Notes (1) For aluminium alloys used at extremely low temperature such as tanks for liquefied gas carrier etc, tensile test at low temperature, tensile test of notched round bar, tensile test in the direction of thickness(thicker than 100 mm) and teat test are to carried out in addition. (2) For tear test, other test may be applied subject to the approval by the Society. (3) Where deemed necessary by the Society, tests related to fatigue tests, weld joint test, corrosion resistance tests and stress corrosion cracking test etc, or submission of reference data relating to these tests may be required. | ||||||||||||
Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 29
Ch 2 Approval of Manufacturing Process Ch 2, Sec 6
Table 2.6.2 Approval Testing Method and Acceptance Criteria for aluminium alloy
Approval test items | Selection of test specimen | Testing method | ||
Location | Direction(1) | |||
Chemical analysis | T(Top part) | - | Ladle analysis and product analysis are to be performed | Chemical composition by ladle analysis is to comply with the requirements in Ch 8, Pt 2 of the Rules. |
B(Bottom part) | ||||
Macro- structure | T | - | To be as deemed appropriate by the Society | To be as deemed appropriate by the Society |
B | ||||
Micro- structure | T | - | ||
B | ||||
Tensile test at room temperature | T | Parallel | in accordance with Pt 2 of the Rules. | In accordance with Pt 2 of the Rules. |
Transverse | ||||
B | Parallel | |||
Transverse | ||||
Tensile test at low temperature | T | Parallel | The tensile tests are to be carried out at -196 °C by using of the tensile test specimens of same size and the same dimensions for tensile test at room temperature. | Reference |
Transverse | ||||
B | Parallel | |||
Transverse | ||||
Tensile test of notched round bar | T | Parallel | The tensile tests are to be carried out at -196 °C by using of the tensile test specimens of notched round bar with following notch Angle of notch : 60° Root radius of notch : 0.05 mm or less ASTM E 602 or equivalent method. | |
Transverse | ||||
B | Parallel | |||
Transverse | ||||
Tensile test in direction of thickness | T | direction of | Test specimens are to be selected in the direction of thickness, and tensile tests are to be carried out. ASTM A 770 or equivalent method. | |
B | thickness | |||
Bend test | T | Parallel | Bend test is to be in accordance with recognized national or international standard which the Society considers appropriate.(e.g. KS D 6701, etc.) | No crack is to be accepted. |
Transverse | ||||
B | Parallel | |||
Transverse | ||||
Tear test | T | Transverse | Tear strength and crack propagation energy are to be determined. Size and dimensions of tear test specimens and tear testing method are to be as deemed appropriate by Society. ASTM B 871 or equivalent method. | Reference |
B | Transverse | |||
Corrosion resistance test | T | Parallel | Test method is to be as specified in Pt 2, Ch 1, 801. 9. of the Rules for the Classification of steel ships. | In accordance with Pt 2, Ch 1, 801. 9. of the Rules |
B | Parallel | |||
NOTES: (1) When the test specimens used for the approval test can not be taken from the test samples because of their dimensions or shapes, the direction of the selection of test specimens to be determined on a case-by-case basis upon mutual consultation by the manufacturer and the Society. (2) Excess difference in the chemical compositions between ladle analysis and product analysis is not to be accepted. | ||||
30 Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015
Ch 2 Approval of Manufacturing Process Ch 2, Sec 7-1
