Description
UNS 31254 - F 44
With moderate mechanical strength (typically over 300 MPa yield strength) and high ductility, the steel is also highly resistant to corrosion, which makes it ideal for use in seawater and a wide range of industrial environments. For the most part, the alloy has a PREN (Pitting Resistance Equivalent) of 42–44, which ensures that it has a high level of resistance to pitting corrosion. In addition, the steel exhibits excellent resistance to crevice corrosion and pitting. The notch ductility at ambient and sub-zero temperatures is extremely good. As a result of these characteristics, high molybdenum stainless steels (such as type 316) can be used successfully as an alternative to 300 series austenitic stainless steels (such as type 316) in applications requiring higher mechanical strength and/or enhanced resistance to pitting and crevice corrosion. The alloy can provide excellent stress corrosion cracking resistance, allowing for tube cold forming without the need for re-annealing at temperatures up to 120 °C without the need for re-annealing. Depending on the environment, this stainless steel provides high economy in combination with corrosion resistance that is comparable to that of nickel alloys and pure titanium, for a total package that is comparable to that of nickel alloys and pure titanium. Stainless steel grade 254 SMOTM is a very high-end austenitic stainless steel with high corrosion resistance.
Combine with stainless steel 300 series to achieve twice the strength while maintaining impact toughness against chloride stress corrosion cracking, pitting, and crevice corrosion.It also provides resistance to pitting and crevice corrosion when combined with stainless steel 300 series. According to the manufacturer, SMOTM Grade 254 is a cost-effective substitute for high-nickel and titanium alloys in a variety of applications. Beyond that, it is well-known for its high degree of flexibility.
