Classes of ASTM A928 S32750 Duplex Steel Electric Fusion Welded / EFW Pipe

Chemical Composition of A928 S32750 Duplex Steel Electric Fusion Welded / EFW Pipe

Tensile & Yield strength of A928 S32750 Duplex Steel Electric Fusion Welded / EFW Pipe

Heat treatment of A928 UNS S32750 Duplex Steel Electric Fusion Welded / EFW Pipe

Here are the main differences between ASTM A790 and ASTM A928
ASTM A790

1. Scope:

   • Covers welded and seamless ferritic-austenitic (duplex) stainless steel pipe intended primarily for use in pressure applications.

2. Material Grades:

   • Focuses on specific grades (e.g., UNS S31803, UNS S32205) that typically have a higher yield strength and are compatible with higher pressures and temperatures.

3. Applications:

   • Commonly used in oil and gas industries, chemical processing, and other pressure vessel applications where strength and corrosion resistance under pressure are critical.

4. Testing Requirements:

   • Emphasizes rigorous testing for mechanical properties, such as yield strength and tensile strength, ensuring the pipe can withstand high-pressure conditions.

ASTM A928

1. Scope:

   • Specifically focuses on welded pipe made from duplex stainless steel for applications requiring corrosion resistance but may not involve the same pressure requirements as A790.

2. Material Classes:

   • Divided into five classes (as previously mentioned), which offer various compositions and mechanical properties tailored to different applications.

3. Applications:

   • Generally suited for less demanding environments where resistance to pitting and stress corrosion cracking is a priority, such as in certain chemical environments or marine applications.

4. Testing Requirements:

   • While still requiring mechanical property evaluations, the focus is more on specific corrosion resistance tests rather than just high-pressure performance.

Chemical Processing Plants
Refinery and Petrochemical Industries
Desalination Plants
Marine Applications
Power Generation
Water Treatment Facilities
Pharmaceutical Industry
Food Processing