The following requirements cover carbon-steel castings intended to be used in hull construction and equipment such as stern frames and rudder frames. These requirements are applicable only to steel castings where the design and acceptance tests are related to mechanical properties at ambient temperature. For other applications, additional requirements may be necessary, especially when the castings are intended for service at low or elevated temperatures. Alternatively, castings which comply with national or proprietary specifications may be accepted, provided such specifications give reasonable equivalence to these requirements. This does not preclude the use of alloy steels in accordance with the permissibility expressed in Section 2-1-1. The steel is to be manufactured by a process approved by ABS.
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