精密儀器用鋼管.交貨技術條件.焊接冷拔鋼管 EN 10305-2 - 2002
①Elements not included in this Table (but see footnote *) shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for finishing the cast. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process.
注：數(shù)據(jù)僅供參考灌龄，以官方原件為準！