Preparation of 6 Stainless Steel (Including a Dual-phase Stainless Steel) Correction Certified Reference Materials for AES and XRFS Analysis

Preparation of six kinds of stainless steel standard reference samples (including 5 austenitic stainless steels and one dual-phase stainless steel) used for re-calibration in AES and XRFS analysis was described in this paper.Chemical composition of these stainless steels were designed refering to designations of 0Cr18Ni9,00Cr19Ni10,0Cr17Ni12Mo2,00Cr17Ni14Mo2,0Cr18Ni10Ti and 00Cr23Ni5Mo3N.Special technological measures were taken in the operations of smelting,casting,rolling and forging to attain the prescribed specifications and homogeneity.A cooperative,interlaboratory program was taken in the characterization analysis of the samples;and 5 qualified analytical laboratories were invited to join the program.Eighteen elements,including main alloy elements and impurity-elements (C,Si,Mn,P,S,Cr,Ni,Cu,Mo,V,Co,Ti,Sn,As,W,Al,Nb,N) were determined and certified.Statistical treatment of analytical data was done using a software and according to the requirements given in the related state and international standards.Certified values of the 18 elements mentioned above with their values of uncertainty were given.Period of validity of these standard reference samples was set at 10 years.