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

The Super Duplex Stainless Steel ranks among the best performing materials that can withstand every corrosion, including the most aggressive environments and high mechanical strength. The usual chemical composition ensures a balanced proportion among chromium, nickel, molybdenum and nitrogen along with the grain having trace amounts of copper and tungsten. Grade charts offer the inlet of appropriate Super Duplex grades, for instance, UNS S32750 (SAF 2507) and UNS S32760 (Zeron 100). The following tables provide information on the alloying, mechanical properties, and standards each grade is manufactured to. Tables classifying the outstanding properties of Super Duplex alloys based on their chemical make up as shows, their high resistance to corrosive environments and the strength they offer are highlighted. Furthermore, the ASTM A240 and ASTM A182 documents specifies the standards and specifications for Super Duplex Stainless Steel to increase consistency and ensure a high level of quality of the same across industries.

Super Duplex Stainless Steel Chemical Composition Table

Super duplex stainless steel, which is a corrosion-resistant alloy, is a highly durable material especially suited for uses in different industries where harsh conditions are common. With regards to the chemical makeup of super duplex stainless steel it is mainly done through a mixture of chromium, nickel, molybdenum and nitrogen, and few others. This content gives materials great resistance to corrosion, particularly in aggressive surroundings such as that of those containing chloride ions. The two main classes of super duplex stainless steel are SAF 2507 and Zeron 100, each manufactured with different compositions based on their specific performance needs.

Super Duplex Stainless Steel Composition Table
UNS Number Duplex Grades Typeb C Mn P S Si Cr Ni Mo N Cu Other
S31200 - 0.030 2.00 0.045 0.030 1.00 24.0-

26.0

 5.5-

6.5

 1.20-

2.00

 0.14-

0.20

 - -
S31260 - 0.03 1.00 0.030 0.030 0.75 24.0-

26.0

 5.5-

7.5

 2.5-

3.5

 0.10-

0.20

 0.20-

0.80

 W0.10-

0.20
S31803 - 0.030 2.00 0.030 0.020 1.00 21.0-

23.0

 4.5-

6.5

 2.5-

3.5

 0.08-

0.20

 - -
S32001 - 0.030 4.0-

6.0

 0.040 0.030 1.00 22.0-

23.0

 1.00-

3.00

 0.60 0.05-

0.17

 1.00 -
S32205 2205 0.030 2.00 0.030 0.020 1.00 19.5-

21.5

 4.5-

6.5

 3.0-

3.5

 0.14-

0.20

 - -
S32304 2304 0.030 2.50 0.040 0.030 1.00 21.5-

24.5

 3.0-

5.5

 0.05-

0.60

 0.05-

0.20

 0.05-

0.60

 -
S32520 - 0.030 1.50 0.035 0.020 0.80 24.0-

26.0

 5.5-

8.0

 3.0-

4.0

 0.20-

0.35

 0.50-

2.00

 -
S32550 255 0.04 1.50 0.040 0.030 1.00 24.0-

27.0

 4.5-

6.5

 2.9-

3.9

 0.10-

0.25

 1.5-

2.5

 -
S32750 2507 0.030 1.20 0.035 0.020 0.80 24.0-

26.0

 6.0-

8.0

 3.0-

5.0

 0.24-

0.32

 0.50 -
S32760 - 0.030 1.00 0.030 0.010 1.00 24.0-

26.0

 6.0-

8.0

 3.0-

4.0

 0.20-

0.30

 0.50-

1.00

 c
S32900 329 d 0.06 1.00 0.040 0.030 0.75 23.0-

28.0

 2.5-

5.0

 1.0-

2.0

 - - -
S32950 - 0.03 2.00 0.035 - - - - - - - -

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