SS2205 是一种双相钢，其显微组织在适当热处理时，奥氏体和铁素体的比例几乎相等。这种显微组织确保 SS2205 比 SS304 和 SS316L 具有更强的抗应力腐蚀开裂能力。较高的铬、钼和氮含量使 SS2205 在存在在大多数环境下，SS2205 还比 SS316L 具有更好的耐一般腐蚀性能。此外，SS2205 的 0.2% 屈服强度约为传统奥氏体不锈钢的两倍。
SS2205的韧脆转变温度约为-50℃。当暴露于300℃至550℃、550℃至1000℃之间的温度时，不锈钢牌号也会变脆并形成chi相。因此应用温度通常限制在-50℃至300℃。
Corrosion Resistance:
1,Due to its high chromium, molybdenum, and nitrogen content, Duplex 2205 demonstrates superior corrosion resistant properties to 316 and 316L in most environments
2,Chromium, molybdenum, and nitrogen content also provide high resistance to pitting and crevice corrosion, even in oxidizing and acidic solutions
3,Resistant to chloride stress corrosion cracking and temperatures of up to about 302°F (150°C)
4,The presence of ferrite provides for good performance of Duplex 2205 in caustic environments
Heat Resistance:
5,Similar to other duplex stainless steels, Duplex 2205 has good oxidation resistance at high temperatures
6,Subject to embrittlement when exposed to temperatures above 572°F (300°C) even when exposed for short periods of time; Duplex 2205 is therefore not recommended for use above 572°F (300°C)
机械性能
