About ISO1161-2006the new standard for container corner castings or fittings:

1. Scope

1.1 These requirements apply to container corner fittings intended to be used for the fabrication of freight containers.

1.2 The dimensions of the container corner fittings dealt with in these requirements must comply with the latest edition of the International Standard ISO 1161. The Society may require manufacturing drawings to be submitted for approval.

2. Approval

2.1 On agreement with the Classification Society, corner fittings may be manufactured using steel casting and other than casting procedures. For this matter, composite corner fittings may be manufactured using welding.

2.2 The corner fittings are to be manufactured at enterprise approved by the Society.  In addition, a special approval test to verify the properties of the materials and welding consumables for container cor-ner fittings is mandatory.  The scope of this approval test will be fixed by the Society in each individual case.

2.3 The approval is to be applied for with the Society in writing.  The application is to be accompa-nied by the manufacturer’s specification, giving full details of the chemical analysis, mechanical proper-ties, heat treatment and welding procedures when manufacturing and welding repair procedures for the corner fittings.

3. Cast steel corner fittings

   3.1 Chemical analysis and deoxydation practice.

  3.2 The application of composition of materials other than specified in table 1 (including low-alloyed,carbon-manganese micro-alloyed steels) may be allowed coming into the agreement with the Classification Society provided they are in compliance with the technical specifications and there are confirmations of good weldability.

3.3 Depending on the mechanical characteristics indicated in the Table 2 the chemical composition of steel (including the grain-refining elements) is to be stated in the approved specifications. Additionally

the cold cracking susceptibility for evaluating weldability should be calculated from the ladle analysis in accordance with the following formula:

3.4 Weldability of steel should be demonstrated by the manufacturer during the approval procedure to the satisfaction of the Classification Society.

3.5 When determining the chemical composition of the fittings material the design temperature and the range of ambient temperatures are to be considered to take into account the temperature range during the transportation at different climate conditions. In any case material resistance for the brittle failure should be guaranteed when normally operating at the ambient temperature from -20oC till + 50oC besides the value of impact energy should be in compliance with the table 2. More wide temperature range (lower-20oC and higher +50oC) may be accepted as agreed by the Classification Society and the Client in accordance with the national standards.

3.6 Heat treatment

All castings are to be suitably heat treated.

3.7 Mechanical Properties

The requirements given in Table 2 are to be fulfilled. The values are applicable to specimens taken from separately cast test pieces.

3.8 Freedom from defects

All castings must have a clean surface compatible with the condition of manufacture. Defect liable to impair the use of the fittings, e.g. sizeable non-metallic inclusions, shrinkage cavities, blowholes and

cracks are not allowed. They may be removed by one of the procedures mentioned in para 7.

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