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1. Standard

National Standard:GB/T 21833

2. Chemical Composition

Elementss C Mn P S Si Cr Mo Ni N Cu
Min           22.0 3.0 4.5 0.14  
Max 0.030 2.0 0.030 0.020 1.00 23.0 3.5 6.5 0.20  
Actual value 0.025 1.30 0.023 0.0001 0.41 22.8 3.1 5.0 0.19 0.20

3. Mechanical Properties

Mechanical Properties Tensile Strength
Yield Strength
Min 655 485 25  
Max       290/30
Actual value 788 620 38 22.5

4.  Typical Size

Size Outside Diameter
Permissible Variations
in Outside Diameter
Wall Thickness
Average Wall Permissible Variations
in Wall Thickness
89×6 89 ±0.75 6 ±7.5%S
Note:Standard requirements control range:OD:±0.75mm,WT:±7.5%S

5. Typical Application Environment

     The duplex stainless steel seamless tube is mainly used in pressure vessel, pressure tanks, high pressure pipe, heat exchanger (chemical processing industry), oil and gas pipelines, heat exchanger pipes, sewage treatment system, pulp and paper industry classifier, bleaching equipment, storage processing system, high strength and corrosion resistance of rotating shaft, squeezing roller, blades, impeller, ship or cargo tank trucks, food processing equipment, the water environmental equipment, etc.

Copyright ? Xinxing Pipes All rights reserved    ICP prepared 16003241 number

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