A269 BA or 180x

A269 specicication for seamless and welded Austenitic stainless steel tubing for general service. This specification covers grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and low- or high-temperature service.

Bright Annealed (BA) is produced by heat-treating (annealing) steel with a  controlled atmosphere furnace. After heat-treatment, the steel has a reflective, mirror-like appearance, but may also have some imperfections and cloudiness. BA stainless steel can be buffed to attain a more reflective finish, and is often specified for applications where a highly reflective surface is desired.

180x – Outside diameter polished to 180 grit finish.

Typical Chemical Properties
304 304L 316 316L
Carbon, max, % 0.08 0.035* 0.08 0.035*
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
Size, Outside Diameter, (inch) Typical Permissible Variations in Outside Diameter Typical Permissible Variations in Wall Thickness
Up to .500 +/-.005" +/- 15 %
.501 to 1.499 +/-.005" +/- 10 %
1.500 to 3.499 +/-.010" +/- 10 %
3.500 to 5.499 +/-.015" +/- 10 %
5.500 to 7.999 +/-.030" +/- 10 %
8.000 to 11.999 +/-.040" +/- 10 %
12.000 to 14.000 +/-.050" +/- 10 %

* for small diameter or thin walls or both Carbon maximum is 0.040 %
Information provided is “Typical” for specific requirements please inquire.