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本修改单经国家技术监督局于1996年12月9日以技监国标函（1996）第215号文批准，虐1997年4月1日起实施。（1）2.2.1钢板厚度允许负偏差更改为：所有厚度-03mm（2）表2中各牌号P、S含量（熔炼成分）更改为S≤0．035％，P≤0.035％。GB712-88(船体用结构钢》第1号修改单
This revised version was approved by the State Bureau of Technical Supervision on December 9, 1996 with Technical Supervision National Standard Letter (1996) No.2155 and abusive on April 1, 1997. (1) 2.2.1 The allowable negative deviation of the thickness of the steel plate is changed as follows: All thickness -03mm (2) The contents of P and S (melting components) in Table 2 are changed into S≤0.035% and P≤0.035%. GB712-88 (Hull structural steel "No. 1 to amend a single