STM A789 UNS S31803 Stainless Steel Tube for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking.
ASTM A789 UNS S31803 Stainless Steel Tube
Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
This specification covers grades of nominal wall thickness, ASTM A789 UNS S31803 Stainless Steel Tube for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.
The tubes shall be made by the seamless or welded process with no filler metal added.
Rapid cooling in air or water
Tensile Strength, min, ksi [MPa]
Yield Strength, min, ksi [MPa]
Elongation in 2 in. or 50
mm, min, %
Flaring Test (for Seamless Tubes)
Flange Test (for Welded Tubes)
Reverse Flattening Test – For welded tubes
Hydrostatic or Nondestructive Electric Test
Permissible Variations in Dimensions
Size, Outside Diameter,
Permissible Variations in Outside Diameter, in.[mm]