ASTM A249 Welded Stainless Steel Tubing:
| Specification | Grade | ASTM | Shape | Size | RangeLength |
| Welded Stainless Steel Tubing | 304/304L | A249/A269 Chemistry Tolerances | Round | 1/4" OD x .028" W to 6" OD x .120" W | 20' RL |
| Desciption: 304/304L welded stainless steel tube is a cost-effective tube used for both structural and pressure applications. 304 alloys exhibit high corrosion resistance, high strength, high temperature resistance and high workability. In addition, it is easy to sanitize and sterilize. Higher carbon levels in 304L decrease the weldability of the alloy. A269 is for general use and A249 is for boiler or other higher temperature use. They can have different heat treat conditions. | |||||
| Application: Is used as hand rails, legs for office, kitchen, and hospital equipment and as architectural supports. | |||||
ASTM A249 Welded Stainless Steel Tubing : ROUND, SQUARE & RECTANGLE SHAPES - ASTM A249/A269 A1016,Permitted Variations in Outside Diameter (a)
Specified Outside Diameter, in. | OD, | Tolerances, in. | ||
Wall | ||||
in. | ||||
Under 1 | ±0.004 | All Sizes +/- 10% | ||
1 to 1-1/2, incl. | ±0.006 | |||
Over 1-1/2 to 2, excl. | ±0.008 | |||
2 to 2-1/2, excl. | ±0.010 | |||
2-1/2 to 3, excl. | ±0.012 | |||
3 to 4, incl. | ±0.015 | |||
Over 4 to 7-1/2, incl. | + 0.015, - 0.025 | |||
Over 7-1/2 to 9, incl. | +0.015, - 0.045 | |||
(a) Except as provided in 10.2 and 10.3, these permitted variations include out-of-roundness. These permitted variations in outside diameter apply to hot-finished seamless, welded and cold-finished seamless tubes before other fabricating operations such as upsetting, swaging, expanding, bending, or polishing.
Outside Diameter, in. Ovality Allowance
1 and under 0.020
Over1 2.0% of specified outside diameter
