High-temperature mechanical properties evaluation of 310S stainless steel

ABSTRACT

The high-temperature mechanical properties of 310S stainless steel were investigated by uniaxial tensile tests and small punch tests at the temperature from 20℃ to 600℃, and the relationship between the mechanical properties (σ_YS ,σ_UTS) and the characteristic loads (F_y, F_m) was established. The results revealed that with increasing temperature, the mechanical properties of 310S decrease, and the characteristic loads obtained by F_{y_Mao}, F_{y_EN} and F_{y_E3205} are more appropriate for determining the yield strength of materials at high temperatures particularly for F_{y_E3205}. The fracture pattern observed in the SPT specimens indicated a mixed tough-brittle fracture accompanied by the characteristics of cleavage fracture. Additionally, the ultimate tensile strength of the material and the maximum load Fm increased slightly at 400 ℃ compared to 300 ℃ due to the precipitation of a large number of granular carbides and the increase in the grain size.

KEYWORDS:

• 310s steel
• Small punch test
• High temperature
• Mechanical properties
• Fracture

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the National Natural Science Foundation of China (No.51705079), Natural Science Foundation of Fujian Province (No.2018J01767), Open Fund of Fujian Key Laboratory of Energy Measurement（Fujian Metrology Institute） (NYJL-KFKT-2022-02).