Tests including the constant load tensile, three point bending and hydrogen induced cracking (HIC) are executed to evaluate the comprehensive properties of the 15CrMoR(H) with new smelting process in saturated hydrogen sulfide (H2S) according to NACE and National Standard. By analyzing and fitting the results of constant load tensile test, the stress-life mathematical model of this material is given. Results show that the stress corrosion threshold of the constant load tensile is 0.7Rel (252MPa).The nominal stress of three point bending SC is higher than 4.5 Rel (1620MPa). Results of HIC test show that the crack length rate CLR is 4.40%, the crack thickness rate CTR is 0.87% and the crack sensitive rate CSR is 0.04%. According to EFC standard, the safety margin is 3.4, 3.4 and 37.5 times respectively. All the experimental results show that the 15CrMoR(H) material has excellent H2S stress corrosion cracking resistance properties.

Study on the construction monitoring was used to focusing on the Bridge and Tunnel. The construction of the steel structure workshop more and more appeared in the past few years, proper method of stress-strain monitoring of the key component while construction of steel structure workshop ,become particularly important factor to ensure the safety of construction process. Based on practical example of Jinbei automobile factory workshop, the paper describes the stress-strain monitoring of steel beam during column demolition. Through the design of test solution and the analysis of test data, get the suitable scheme of stress-strain monitoring, stress and strain field monitoring of the basic program, meeting the monitoring requirement whether steel beam is safe and reliable during column demolition, and could provide basis and support for similar conditions on-site monitoring.