Iranian Classification Society Rules
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Section 7-1 Copper Alloy Castings
701. Application
The requirements in this Section apply to the tests and inspection for the approval of manufacturing process of copper alloy casting to be used for propellers, propeller blades and bosses as specified in Pt 2, Ch 1, 702. of the Rules.
702. Data to be submitted
The following reference data in addition to those specified in 102. are to be submitted to the Society.
(1) Kind of the propeller castings (each material grade) and specifications
(2) General description on major manufacturing facilities (moulding, melting, casting, furnace and machining installations and their capacities)
(3) General description on the testing and inspection facilities (various testing and inspection
ments and installations)
(4) Repair and NDT procedures (if any)
equip-
703. Approval tests
1. Approval tests are to be in accordance with the Table 2.7.1.
Table 2.7.1 Approval Testing Method and Acceptance Criteria for copper alloy castings
Test item | Test method | Acceptance criteria |
chemical composition | Analysis of chemical composition on ladles and separately cast test specimens is to be carried out | To comply with the Rule requirements |
Tensile test | Tensile tests are to be carried out in accordance with the require- ments specified in Pt 2, Ch 1, 702. 6 of the Rules. | To comply with the Rule requirements |
Micro-structure analysis | The micro structure of alloy types CU 1 and CU 2 shall be veri- fied by determining the proportion of alpha phase. For this pur- pose, at least one specimen shall be taken from each heat. The proportion of alpha phase shall be determined as the average val- ue of 5 counts. | To comply with the Rule requirements |
Other test | To be as deemed appropriate by the Society | To be as deemed appro- priate by the Society |
2. Notwithstanding the requirements in the preceding 1 some parts of the tests may be omitted in case of propellers with a diameter of 2.5 m or less.
704. Dealings after approval
Copper alloy castings 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.
Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 31
Ch 2 Approval of Manufacturing Process Ch 2, Sec 7-2
