BS 970-4(1970) : 1970被替代
SPECIFICATION FOR WROUGHT STEELS IN THE FORM OF BLOOMS, BILLETS, BARS AND FORGINGS - PART 4: VALVE STEELS
出版：British Standards Institution
專家解讀視頻
Describes valve steels in the form of blooms, billets, bars and forgings.
ISO 683-13 : 1974 - Similar to
ISO 683-15 : 1992(2018) - Similar to
NZS/BS 970.4:1970 - Identical
ISO 683-17 : 2014 - Similar to
EURONORM 90 : 1971 - Similar to
ISO 683-13 : 1974 - Similar to
NZS/BS 970.4:1970 - Identical
ISO 683-15 : 1992(2018) - Similar to
