ASTM A789 S31803- أنبوب غير ملحوم من الفولاذ المقاوم للصدأ على الوجهين

ASTM A789 S31803 DUPLEX Stainless Steel Tube

 
ASTM A789 S31803 is a specification for seamless and welded duplex stainless steel tubes. Duplex stainless steel refers to a type of stainless steel that contains a combination of both austenitic and ferritic stainless steels. This combination provides enhanced mechanical properties and corrosion resistance compared to traditional stainless steels.
The S31803 grade specifically refers to a duplex stainless steel alloy that contains approximately 22% chromium, 5% nickel, 3% molybdenum, and small amounts of other elements such as nitrogen and manganese.
ASTM A789 is the standard specification for seamless and welded duplex stainless steel tubes for general corrosion-resisting and low or high-temperature service. This specification covers tubes in sizes ranging from 1/8" to 5" in outside diameter, with wall thicknesses from 0.015" to 0.500".
Duplex steel tubes made to the ASTM A789 S31803 specification are commonly used in various industries such as oil and gas, chemical processing, pulp and paper, and desalination plants. They are known for their high strength, excellent corrosion resistance, and good weldability.
It is important to note that ASTM A789 S31803 tubes should be used in accordance with the specific requirements and conditions of the application, and proper testing and inspection should be conducted to ensure their suitability for the intended use.
 
 

S31803 / S32205 Duplex Pipes Chemical Composition

Duplex Steel S31803 / S32205 Pipe Mechanical Properties

Equivalent Grades for S31803 / S32205 Duplex Stainless Steel Pipe

 
 
S32750 and S31803 are both types of stainless steel, but they belong to different series with different chemical compositions, mechanical properties and application areas.
 
S32750 is a duplex stainless steel with main alloying elements including iron, chromium, nickel, molybdenum, etc., with a higher molybdenum content to improve corrosion resistance. It has high tensile strength and yield strength, good weldability and processability. It is mainly used in harsh marine environments, such as offshore platforms, seawater treatment equipment, chemical equipment, etc., especially in environments containing chlorides.
 
S31803 is also a duplex stainless steel with a chemical composition similar to S32750, but the specific element ratio may be different to meet specific application requirements. It also has high mechanical strength and good corrosion resistance, suitable for use in a variety of industrial environments. Similar to S32750, S31803 is also widely used in marine engineering, chemical industry, oil and gas industries, especially in situations where chloride corrosion resistance is required.
 
Although S32750 and S31803 look similar in name, their specific chemical compositions, performance parameters and application areas may differ. The main difference lies in their composition ratios and design targets to suit specific corrosion challenges in different environments. For example, S32750 may target a higher molybdenum content to enhance its corrosion resistance in chloride-containing environments, while S31803 may be optimized in other aspects, such as cost control or specific mechanical property requirements.
 
When selecting, the most suitable steel grade should be determined based on specific application conditions, environmental factors and budget. It is recommended to consult a professional material supplier or engineer before purchasing to ensure that the selected material can meet all performance and safety standards.
 
 
Application:
1. Oil and gas industry
2. Chemical processing
3. Desalination plants
4. Heat exchangers
5. Pulp and paper industry
6. Power generation
7. Food processing industry