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Duplex Stainless Steel Chemical Composition, Grade Chart, Tables and Documents

Duplex stainless is most often known for having excellent corrosion resistance and high strength because of its balanced consists of both austenite and ferrite phases. These are incrementing grades, 2205, 2507, and 2507 respectively. The majority of sintered stainless steel are made of elements like chrome (which generally contain 22-26%), nickel (4.5-8%) molybdenum (3-5%) and nitrogen (0.14-0.20%). These alloys are characterized by extreme performance resistance in intimidations operating circumstances like marine industries and chemical processing. Tables and charts of grades provide detailed information in regard to mechanical properties, corrosion ration, and applications, which are very helpful for the engineers and manufacturers to pick the suitable grade to meet their unique needs. Duplex stainless steels are often found in specifications either through ASTM standards or technical datasheets which offer better insight on their characteristics and properties.

Duplex Stainless Steel Chemical Composition Table

Duplex stainless steel is a fantastic material with very valuable highest corrosion resistance and extensive palette of mechanical properties. Its chemical composition, or as it is commonly referred to as the microstructure, usually comprises a nice mix of austenite and ferrite phases. This blend of strength and durability is what makes it unique. Chromium, nickel, molybdenum, and nitrogen are present in duplex stainless steel as the common chemical constituents. Nickel and chrome fashion the finest kind of resistance and toughness while this impede disintegration. Molybdenum helps in termination of pitting and crevice corrosion, but nitrogen promotes increase in strength and also weldability. This specific mixture of elements has imparted duplex stainless steel with the property of being suitable for a huge variety of fields covered by different industries.

Duplex Stainless Steel Composition Table
Elements 2205 UR52N+

C

0-0.03

0.03 max

Mn

2.0

1.5

Si

1.0

0.8

P

0-0.03

0.035

S

0-0.02

0.02

Cr

21-23

24-26

Mo

2.5-3.5

3.0-5.0

Ni

4.5-6.5

5.5-8.0

N

0.08-0.2

0.2-0.35

Cu

-

0.5-3.0

Lean Duplex Stainless Steels and Their Composition

Name UNS En No. C Mn Si Cr Ni Mo N Cu Other PREN
2101 S32101 1.4162 0.04 4.0-6.0 1 21.0-22.0 1.35-1.70 0.1-0.8 0.20-0.25 0.1-0.8 - 25-27
2202 S32202 1.4062 0.03 2 1 21.5-24.0 1.00-2.80 0.45 0.18-0.26 - - 25-28
2304 S32304 1.4362 0.03 2.5 1 21.5-24.5 3.0-5.5 0.05-0.6 - - - 25-28
2102 S82011 - 0.03 2.0-3.0 1 20.5-23.5 1.0-2.0 0.1-1.0 0.15-0.27 0.50-0.60 - 25-27

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