What is ASTM A269?
ASTM A269 is a material standard for austenitic stainless steel seamless and welded mechanical tubes. It is mainly used to specify the requirements for the size, chemical composition, mechanical properties, manufacturing process and quality control of these stainless steel tubes.
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 |
ASTM A269 provides guidance for the manufacture and quality control of pipes, helping to ensure product consistency and reliability. In addition, the standard also provides a standardized reference for the procurement and use of pipes.
