Q235钢抗拉强度测量不确定度评定

Measurement Uncertainty Evaluation on Tensile Strength of Q235 Steel

摘要: 根据GB/T 228.1—2010对Q235钢抗拉强度的测量不确定度进行分析与计算。结果表明：该Q235钢的抗拉强度为580 MPa，取置信度为95%，包含因子k=2，其相对扩展不确定度为1.6%。其测量不确定度报告可表示为R_m=580×（1±1.6%）=（580±9） MPa，k=2。

Abstract: According to GB/T 228.1-2010, the measurement uncertainty of the tensile strength of Q235 steel was analyzed and calculated. The results show that the tensile strength of the Q235 steel was 580 MPa. When the confidence is 95%, the inclusion factor k=2, and the relative expanded uncertainty was 1.6%. The measurement uncertainty report can be expressed as R_m=580×(1±1.6%)=(580±9) MPa, k=2.