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那位朋友帮我翻译一下?谢谢了

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那位朋友帮我翻译一下?谢谢了
In general for steels, the conventional proof stress to be
assumed is the 0,2 per cent proof stress or the 0,5 per cent
proof stress, designated by the symbols Rp0,2 and Rp0,5,
respectively, where 0,2 and 0,5 are the percentage of permanent
elongation.
For austenitic and duplex stainless steel products and relevant
welding consumables, the 1,0 per cent proof stress,
designated by the symbol Rp1,0 , may be determined in addition
to Rp0,2.
通常对钢来说,我们常规设定的屈服强度是应力极限的的0.2%或应力极限的0.5%,分别由符号Rp0.2和Rp0.5来称呼,这里的0.2和0.5到塑性变形时的应力的百分比.
对于奥氏体不锈钢和双向不锈钢及相关的焊接材料,除了Rp0.2,1%的应力极限——被称为Rp1.0,有时也可能会被采用.
是材料力学方面的文献吗?好久不接触了,概念都快忘记光了呢.