Iranian Classification Society Rules
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Section 2 Test Specimens and Testing Procedures
201. General
1. Application
In case where test specimens or test procedures specified in the requirements of ISO or K S are adopted, the approvals by the Society may be dispensed with, notwithstanding the requirement in
201. 1 (2) of the Rules.
2. Testing machine
In application to 201. 2 (2) and (3) of the Rules, the term "other recognised standard" means the acceptance in accordance with Pt 1, Ch 1, 104. or 105. of the Guidance.
3. Selection of test specimens
"Where otherwise specified or agreed with means only where manufacturing process of the requirements of Ch 2 of "Guidance Approval, etc" by the Society
the the for
Surveyor" referred in 201. 3 (2) of the Rules material has been already approved according to Approval of Manufacturing Process and Type
202. Form and dimension of test specimen
1. Tensile test specimen
(1) The gauge length of the R 14B tensile test specimens specified in Fig 2.1.1 of the Rules may be used as given in Table 2.1.1 of Guidance in accordance with 201. 1 (2) of the Rules.
Table 2.1.1 Rounding of Gauge Length
Thickness of test specimen t (mm) | Width of test specimen W (mm) | Gauge length L (mm) | ||
3 | t | 4 | 25 | 50 |
4 | t | 5 | 60 | |
5 | t | 7 | 70 | |
7 | t | 10 | 80 | |
10 | t | 15 | 100 | |
15 | t | 20 | 120 | |
20 | t | 30 | 140 | |
30 | t | 40 | 160 | |
(2) In application to 202. 1 (4) of the Rules, corrections for elongation are to be in accordance with the followings :
(A) Stainless steel and aluminium alloys are to be considered as Material 1 in Table 2.1.1 of the Rules. However, corrections for elongation specified in 202. 1 (4) of the Rules may not
be required in the case of copper alloy.
(B) In case where the corrections by the requirements of 202. 1 (4) of the Rules are deemed troublesome because of a great number of test specimens, the value of specified elongation
may be corrected by using the following formula. In such case, the corrected specified elon-
gation is to be recorded in the certificates of the material test.
where
= Elongation equivalent to where the proportional specimens ( ) specified in Fig 2.1.1 of the Rules are used.
Guidance Relating to the Rules for the Classification of Steel Ships 2015 3
Pt 2 Materials and Welding
Ch 1 Materials Pt 2, Ch 1
= Elongation where optional test specimens are used.
= Coefficient of correction for elongation are shown in Table 2.1.2 of the Guidance according to the gauge length.
Table 2.1.2 Values of F
Gauge length ( ) | Material 1 | Material 2 |
8 | 1.21 | 1.29 |
| 1.15 | 1.21 |
4 | 0.91 | 0.88 |
| 0.87 | 0.82 |
: Diameter of the test specimen : Sectional area of the test specimen | ||
2. Impact test specimen
(1) In application to 202. 3 (3) of the Rules, the sub-size ness of the steels are to be as follows;
specimens permitted according to thick-
Steel thickness | Width of the sub-size specimen | |
≤ | ≺ | 5 mm |
≤ | ≺ | 7.5 mm |
(2) In application to 202. 3 (5) of the Rules, in case where the capacity of impact tester limits the use of normal impact test specimens, sub-size specimens can be used provided that the test re- sults using sub-size specimens are to comply with the requirements specified for the normal im- pact test specimens.
4 Guidance Relating to the Rules for the Classification of Steel Ships 2015
Pt 2 Materials and Welding
Ch 1 Materials Pt 2, Ch 1
