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  Duplex Stainless Steel Tube
     Description
  Product Description and Field Application:
Duplex stainless steel tubes & pipes are with high mechanical strength and good elongation and weldability which needs no pre-heating before welding and heat treatment after welding, low thermal expansion and have excellent resistance to stress corrosion cracking, pitting and crevice corrosion, and high resistance to general corrosion in different environments. Duplex stainless steel tubes & pipes are applied to heat exchangers in refinery industries, petrochemical plants, paper & pulp industries, sugar & beverage industries.

Executive Standards:
ASTM /ASME A789/SA789 A790/SA790
Steel Grade:
UNS S32750 S31803 S31500

 

Chemical Composition

Grade C max Si max Mn max P max S max Cr Ni Mo N

UNS S32750

0.030

0.8

1.2

0.030

0.015

24.0-26.0

6.0-8.0

3.0-5.0

0.24-0.32

UNS S31803

0.030

1.0

2.0

0.020

0.020

21.0-23.0

4.50-6.50

2.50-3.50

0.08-0.20

UNS S31500

0.030

1.0

1.2-2.0

0.030

0.030

18.0-19.0

4.50-5.50

2.50-3.50

0.05-0.1

Physical Properties

Grade Yielding strength
MPa min 		Tensile strength
Mpa min		 Elongation
 Hardness
HRC 

UNS S32750

550

800

15

20

UNS S31803

450

620

25

20

UNS S31500

440

630

30

20

Size Range

 

  

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