scope:

This Standard specifies quenched and tempered manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates (hereafter referred to as "steel plates"), excellent especially in low temperature toughness and weldability, or suited for thermal refining by quenching and tempering, to be used for nuclear reactors and other pressure vessels.

NOTE : The International Standards corresponding to this Standard and the symbol of degree of correspondence are as follows:

IS0 9328-1 : 2003 Steel flat products for pressure purposes-Technical delivery conditions-Part 1: General requirements

IS0 9328-2 : 2004 Steel flat products for pressure purposes-Technical delivery conditions-Part 2: Non-alloy and alloy steels with specified elevated temperature properties (Overall evaluation: MOD)

The symbols which denote the degree of correspondence in the contents between the relevant International Standards and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/ IEC Guide 21.