Evaluation of Stress Corrosion Resistance Properties of 15CrMoR(H) in H₂S Environment

Abstract:

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 0.7R_el (252MPa).The nominal stress of three point bending S_C is higher than 4.5 R_el (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.

• Periodical: Applied Mechanics and Materials (Volumes 477-478)
• Pages: 14-20
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.477-478.14
• Online since: December 2013
• Authors: Cui Cui Wang, Jing Wang, Yi Liang Zhang, Yan Li
• Keywords: 15CrMoR(H) Materials, H₂S Environment, Hydrogen Induced Cracking, Stress Corrosion

References

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DOI: 10.1201/9780429273858