Evaluation of Uncertainty for Determination Result of Tensile Strength in Steel D409GUO Su-juan Central Laboratory of Dongbei Special Steel Group Co Ltd, Dalian 116031 ,Liaoning, ChinaAbstract:In order to evaluate the measurement uncertainty of tensile strength of steel, the mathematic model of uncertainty of steel（D409）is established. And different influence factors of measurement result are analyzed and calculated. At last, the measurement result is expressed with the expanded uncertainty.[著者文摘]
Key words:Tensile strength; uncertainty of measurement ; standard uncertainty;expanded uncertainty
