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Designation: A 313/A 313M –03 Standard Speci?cation for Stainless Steel Spring Wire 1 This standard is issuedunder the ?xed designation A 313/A 313M; the number immediately following the designation indicates the year of original adoption or, in the caseof revision, the year of last revision. A number in parenthesesindicates the year of last reapproval. A superscript epsilon (e) indicates an edito
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SA-738M Gr.A屬中低溫壓力容器用經(jīng)熱處理的碳錳硅鋼,供貨狀態(tài)為調(diào)質(zhì)處理,C、Mn含量范圍略寬,且含有一定量的Cr、Ni、Nb、V、Cu。其中Cr、V為強(qiáng)化元素,有利于提高強(qiáng)度,鋼板經(jīng)過淬火處理后可以保證其強(qiáng)度滿足要求;Ni元素可以降低鋼材的脆性轉(zhuǎn)變溫度,提高鋼材的低溫沖擊韌性;Nb、V、Cu元素可細(xì)化晶粒,有利于提高韌塑性。結(jié)合SA-738M Gr.A調(diào)質(zhì)鋼的焊接特點(diǎn)及外缸體組件的結(jié)構(gòu)特點(diǎn),進(jìn)行了SA-738M Gr.A調(diào)質(zhì)鋼的焊條電弧焊、埋弧焊的對(duì)接焊縫焊接工藝評(píng)定及產(chǎn)品的施焊,試驗(yàn)結(jié)果表明,各項(xiàng)技術(shù)指標(biāo)均滿足要求,證明所選用的焊接方法、焊接材料、焊接及熱處理工藝正確合理。