What is the grade of duplex stainless steel?

Duplex stainless steel grades have a ferritic-austenitic microstructure, with a phase balance of approximately 50% ferrite and 50% austenite. They combine many of the beneficial properties of ferritic and austenitic stainless steels.

Is 304 stainless steel a duplex?

Duplex stainless steels are a family of stainless steels. They are designed to provide better corrosion resistance, particularly chloride stress corrosion and chloride pitting corrosion, and higher strength than standard austenitic stainless steels such as Type 304 or 316.

What is duplex stainless steel pipe?

Duplex stainless steel is a very useful metal that is used the world over. It gets its name from the fact that it consists of two different grades of metal. Essentially, Duplex is a Fe-Ni-Cr alloy that has a two-phase ferritic-austenitic stainless-steel microstructure when it is at room temperature.

What is the composition of duplex stainless steel?

Duplex 2205 is a two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5 to 6% nickel alloyed stainless steel. It is the most widely used duplex stainless steel grade and is characterized by high yield strength, double that of the standard austenitic stainless steel grades.

Does duplex 2205 rust?

As with all corrosion-resistant alloys, duplex stainless steels can suffer corrosion when exposed to suitably corrosive conditions. For instance, the PREN for a duplex stainless steel (Sanmac 2205, SAF2205, 1.4462, F51/F60, S31803, S32205) is 34, whilst that for Alloy 316L (1.4404, S31603) is only 25. …

What is the difference between stainless steel and duplex?

Duplex stainless steel has a lower level of molybdenum and nickel that makes its price low or budget-friendly. Another difference between a duplex and 316-stainless steel is austenitic, or 316-stainless steel contains 18% chromium and 8% nickel whereas, Duplex contains 18-28% of chromium and 4.5-8% of nickel.

Is 2205 duplex stainless steel magnetic?

They are all fully magnetic all the time. The best known duplex grade, 2205, resists corrosion even better than 316 because it contains 22% of chromium and 3% of molybdenum. Both are magnetic, because both are ferritic.

What is duplex stainless steel used for?

Duplex stainless steel, famous for its excellent combination of good mechanical properties and high corrosion resistance, is widely used in the industrial fields, such as the production of seawater heat exchangers and the chemical containers for use in the high-concentration chloride environments.

Why is 1.4462 stainless steel called a duplex?

Duplex names comes from properties of this grade, because this grades shows two different stainless steel grade phases and this s why it is called duplex. 1.4462 can also be called 2205 or F51 and all these different names indicate the same stainless steel grade. This grade has a better corrosion resistance then 316L and 316Ti.

What is the grade of stainless steel 1.4462?

This grade is written as 1.4462 or X2CrNiMoN22-5-3 according to EN norm and it is written as UNS S31803 or S32205 according to UNS norm. Some producers can also name this 1.4462 material as Temet, Aquashaft, Marinox but the actually, all this names are equal to 1.4462 duplex stainless steel.

Which is the best stainless steel duplex grade?

1.4462 duplex stainless steel is a really good grade for corrosion resistance and mechanical properties. This grade is written as 1.4462 or X2CrNiMoN22-5-3 according to EN norm and it is written as UNS S31803 or S32205 according to UNS norm.

How big is a 2205 stainless steel duplex?

Duplex Stainless Steel Grades Grade Other Name EN / WNR UNS Duplex Type 2205 Duplex 2205 1.4462 UNS S31803 Standard Duplex 2205 Duplex 2205 1.4462 UNS S32205 Standard Duplex 2507 Super Duplex 2507 1.4410 UNS S32750 Super Duplex Zeron Zeron 100 / Super Duplex 1.4501 UNS S32760 Super Duplex