Press

Performance Characteristics Of Duplex Stainless Steel Pipe


Duplex Pipe is supported by duplex stainless steel, so it features duplex stainless steel.

Duplex stainless steel has the following performance characteristics:
(1) Molybdenum-containing duplex stainless steel has good resistance to chloride stress corrosion under low stress. Generally, 18-8 type austenitic stainless steel is prone to stress corrosion cracking in neutral chloride solution above 60 °C, and heat exchangers, evaporators, etc. made of such stainless steel in industrial medium of trace chloride and hydrogen sulfide. There is a tendency to produce stress corrosion cracking, while duplex stainless steel has good resistance.

(2) Molybdenum-containing duplex stainless steel has good pitting resistance. The duplex pitting potential of the duplex stainless steel is similar to that of the austenitic stainless steel when it has the same pitting resistance equivalent value (PRE=Cr%+3.3Mo%+16N%). The pitting corrosion resistance of duplex stainless steel and austenitic stainless steel is comparable to that of AISI 316L. The pitting and crevice corrosion resistance of 25% Cr-containing, especially nitrogen-containing, high-chromium duplex stainless steels exceeds that of AISI 316L.

(3) It has good corrosion fatigue and wear corrosion resistance. It is suitable for making power equipment such as pumps and valves under certain corrosive media conditions.

(4) The comprehensive mechanical properties are good. It has high strength and fatigue strength, and its yield strength is twice that of 18-8 austenitic stainless steel. The elongation in the solid solution state is 25%, and the toughness value AK (V-notch) is above 100J.

(5) Good solderability, low thermal cracking tendency, generally no preheating before welding, no heat treatment after welding, and can be welded with 18-8 type austenitic stainless steel or carbon steel.

(6) The duplex processing temperature of the duplex stainless steel containing low chromium (18%Cr) is wider than that of the 18-8 austenitic stainless steel, and the resistance is small, and the steel sheet can be directly rolled and rolled without forging. The hot processing of duplex stainless steel containing high chromium (25% Cr) is a little more difficult than austenitic stainless steel, and can produce products such as plates, tubes and wires.

(7) Compared with 18-8 type austenitic stainless steel, the work hardening effect is greater in cold working. When the tube and the plate are subjected to deformation, large stress is required to deform.

(8) Compared with austenitic stainless steel, it has a large thermal conductivity and a small coefficient of linear expansion, and is suitable for use as a lining for equipment and for producing composite panels. Also suitable for making heat exchanger dies, heat transfer efficiency is higher than austenitic stainless steel.

(9) There are still various brittleness tendencies of high-chromium ferritic stainless steel, which should not be used in working conditions above 300 °C. The lower the chromium content in duplex stainless steel, the less harmful the brittle phase such as σ.



New service from OilVoice
Trip Shepherd is for companies who need to track their staff in areas of risk.
It's free to use, so we invite you to try it.

Visit source site

https://kaysuns.com/performance-characteristics-of...

duplex pipestainless steelduplex steelstainless steel pipeduplex 2205

More items from cnwellgreen


South African Stainless Steel Manufacturer Robor Is Forced To Liquidate

South African stainless steel manufacturer Robor is forced to liquidate According to reports, the pipes and stainless steel pipe supplier and manufacturer 'Robor tube and pipe' in the Western Cape Province, the manufacturer Robor tube and pipe was forced to liquidate, and was blamed for the decl ...

roger chen - kaysuns industry limited


Posted 6 days agoPress > stainless steel manufacturerstainless steel pipe supplierstainless steel tubing supplier +1

The Philippines Lifted The Ban On Dmci's Nickel Miners, And Is The Stainless Steel Pipe Market Affected?

The Philippines Lifted The Ban On Dmci's Nickel Miners, And Is The Stainless Steel Pipe Market Affected? Recently, it was reported that DMCI Holdings said in a filing with the regulator on Thursday that the Ministry of Environment and Natural Resources of the Philippines had lifted the suspension ...

roger chen - kaysuns industry limited


Posted 9 days agoPress > stainless steel tubing supplierstainless steel pipe supplierNickel +1

Does Stainless Steel Pipe Better than Pvc Pipe in Decoration

Why Do Western Prefer To Use Stainless Steel Pipe In Decoration, Chinese People Choose Pvc Pipe? Everyone knows that the way of thinking and living habits between China and Western countries are very different. Today we will talk about the differences in the use of decoration materials. Why do for ...

roger chen - kaysuns industry limited


Posted 10 days agoPress > stainless steel pipestainless steel tubings

China’s Manufacturing PMI Rebounded To 49.8% In September 2019

According to data released by the National Bureau of Statistics of China on September 30, the China Manufacturing Purchasing Managers Index (PMI) was 49.8% in September 2019, up 0.3 percentage points from the previous month. This is especially for Chinese  stainless steel tubing supplier  and  stai ...

roger chen - kaysuns industry limited


Posted 11 days agoPress > KAYSUNSstainless steel pipe supplierstainless steel tubing supplier +1

Application of Frequency Control Technology in Oil Industry

In recent years, the frequency conversion speed regulation technology has been widely used in oil field enterprises due to its characteristics of performance safety and remarkable energy saving. The article briefly introduces the basic working principle of the frequency conversion speed regulation ...

roger chen - kaysuns industry limited


Posted 12 days agoPress > oil industryKAYSUNSSTAINLESS +2
All posts from cnwellgreen