Measuring Crack Propagation Parameters of Q235 Steel with Experiment Zhao Zhangyan Lei Xinhua Sun Guozheng Zhao Zhangyan Assoc. Prof., Dept.of Logistics,WUT, Wuhan 430063, China. Fatigue crack propagation parameters of a material are inherent characteristics. They play important role in monitoring crack propagation. In order to monitoring crack propagation of Q235 steel in engineering, the parameters are measured with experiment.The parameters are used in ports,railway etc.Q235 steel; fatigue crack; propagation parameters; experiment measuring Zhao Zhangyan: Assoc. Prof., Dept.of Logistics,WUT, Wuhan 430063, China.