Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 1 General Hull Requirements - Chapter 3 Structural Design Principles - Section 1 Materials - 3 Steels for Forging and Casting
3 Steels for Forging and Casting
3.1 General
3.1.1 Mechanical and chemical properties of steels for forging and casting to be used for structural members are to comply with the applicable requirements of the Rules for Materials of the Society.
3.1.2 Steels of structural members intended to be welded are to have mechanical and chemical properties deemed appropriate for this purpose by the Society on a case-by-case basis.
3.1.3 The steels used are to be tested in accordance with the applicable requirements of the Rules for Materials of the Society.
3.2 Steels for forging
3.2.1 Rolled bars may be accepted in lieu of forged products, after consideration by the Society on a case-by-case basis. In such case, compliance with the applicable requirements of the Rules for Materials of the Society, relevant to the quality and testing of rolled parts accepted in lieu of forged parts, may be required.
3.3 Steels for casting
3.3.1 Cast parts intended for stems and stern frames in general may be made of C and C-Mn weldable steels, having specified minimum tensile strength, Rm = 400 N/mm2, in accordance with the applicable requirements of the Society’s Rules for Materials.
3.3.2 The welding of cast parts to main plating contributing to hull strength members is considered by the Society on a case-by-case basis.
The Society may require additional properties and tests for such casting, in particular impact properties which are appropriate to those of the steel plating on which the cast parts are to be welded and non-destructive examinations.
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