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S25073

Category：Duplex Stainless Steel PipePublishedDate：2019-05-20

1. Standard

National Standard：GB/T 21833

2.  Chemical Composition

Elements C Mn P S Si Cr Mo Ni N Cu
Min           24.0 3.0 6.0 0.24  
Max 0.030 1.20 0.035 0.020 0.80 26.0 5.0 8.0 0.32 0.50
Actual value 0.026 0.69 0.030 0.002 0.54 25.7 3.5 6.2 0.29 0.088
 

3.Mechanical Properties

Mechanical Properties Tensile Strength
MPa		 Yield Strength
MPa		 Elongation
%		 Hardness
HBW/HRC
Min 800 550 15  
Max       300/32
Actual value 863 726 37 23.3

4. Typical Size

Size Outside Diameter
Mm		 Permissible Variations
in Outside Diameter
mm		 Wall Thickness
mm		 Average Wall Permissible Variations
in Wall Thickness
60×5.5 60 ±0.50 5.5 ±7.5%S
 

Note:Standard requirements control range:OD：±0.50mm，WT：±7.5%S 

5. Typical Application Environment

      Applications include: Pulp and paper processes, seawater desalination, flue gas purification, heat exchangers, chemical tanker piping systems, seawater systems, oil and gas industries, offshore oil platforms (heat exchanger pipes, water treatment and water supply systems, fire control systems, Water spraying system, water stabilizing system, petrochemical equipment, desalting (desalination) equipment (and high pressure pipes and sea water pipes in the equipment), which require both high strength and high corrosion resistance mechanical and structural components.
 

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