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3A3M磨料地毯
A313A313M-03不锈钢弹簧丝技术规范
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
SA-738M Gr.A调质钢的焊接
SA-738M Gr.A调质钢的焊接
SA-738M Gr.A属中低温压力容器用经热处理的碳锰硅钢,供货状态为调质处理,C、Mn含量范围略宽,且含有一定量的Cr、Ni、Nb、V、Cu。其中Cr、V为强化元素,有利于提高强度,钢板经过淬火处理后可以保证其强度满足要求;Ni元素可以降低钢材的脆性转变温度,提高钢材的低温冲击韧性;Nb、V、Cu元素可细化晶粒,有利于提高韧塑性。结合SA-738M Gr.A调质钢的焊接特点及外缸体组件的结构特点,进行了SA-738M Gr.A调质钢的焊条电弧焊、埋弧焊的对接焊缝焊接工艺评定及产品的施焊,试验结果表明,各项技术指标均满足要求,证明所选用的焊接方法、焊接材料、焊接及热处理工艺正确合理。