Microstructure -- the critical variable controlling the SSC resistance of low-alloy steels
- Exxon Production Research Co., Houston, TX (United States)
- STEM, Inc., Woodbridge, CT (United States)
The effects of microstructure on the sulfide-stress-cracking resistance (SSC) of AISI 4130 steel are illustrated using NACE test method TM0177. SSC resistance was a function of the amount of martensite that formed on quenching, with the best resistance obtained for material that possessed 100 percent martensite. Samples with lesser amounts of martensite exhibited significantly poorer SSC resistance. These data emphasize the need to control microstructure as a means to achieve significant improvements in the SSC resistance of steels, and show that traditional controls on hardness are unreliable and do not uniquely define nor guarantee good SSC resistance. Specifying threshold stress is the most reliable method to ensure a specific or an adequate amount of SSC resistance.
- OSTI ID:
- 99520
- Report Number(s):
- CONF-950304--
- Country of Publication:
- United States
- Language:
- English
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