A-249 Welded

A249 specicication covers nominal-wall-thickness welded tubes and heavily cold worked welded tubes made from austenitic steels, with various grades intended for use as boiler, superheater, heat exchanger, or condenser tubes.

Typical Chemical Properties
304 304L 316 316L
Carbon, max, % 0.08 0.030 0.08 0.030
Manganese, Max, % 2.00 2.00 2.00 2.00
Phosphorous, Max, % 0.045 0.045 0.045 0.045
Sulfur, Max, % 0.03 0.03 0.03 0.03
Silicon, Max, % 1.00 1.00 1.00 1.00
Chromium, % 18.0 – 20.0 18.0 – 20.0 16.0 – 18.0 16.0 – 18.0
Nickel, % 8.0 – 11.0 8.0 – 12.0 10.0 – 14.0 10.0 – 14.0
Molybdenum, % 0 0 2.00 – 3.00 2.00 – 3.00
Typical Mechanical Properties
304 304L 316 316L
Tensile Strength Minimum ksi (MPa) 75 (515) 70 (485) 75 (515) 70 (485)
Yield Strength Minimum ksi (MPa) 30 (205) 25 (170) 30 (205) 25 (170)
Elongation Min 35% 35 35% 35
Rockwell Hardness Number, maximum B90 B90 B90 B90
Typical Permissible Variations in Wall Thickness
All wall thickness' +20% / 0%
Typical Permissible Variations in Outside Diameter
Outside Diameters Under 1.000" +0.004" / -0.004"
Outside Diameters 1.000" – 1.500" inclusive +0.006" / -0.006"
Outside Diameters 1.501" – 2.000" +0.008" / -0.008"
Outside Diameters 2.001" – 2.500" +0.010" / -0.010"
Outside Diameters 2.501" – 2.999" +0.012" / -0.012"
Outside Diameters 3.000" – 4.000" +0.015" / -0.015"

Information provided is “Typical” for specific requirements please inquire.