ASTM A249 TP304L steel pipe covers nominal-wall-thickness welded tubes and heavily cold worked welded tubes made from the austenitic steels.
ASTM A249 TP304L chemical composition
| Grade | C | Mn | P | S | Si | Cr |
| TP304L | 0.030 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0-20.0 |
ASTM A249 TP304L tensile and hardness requirements
| Grade | UNS | Tensile strength min,ksi mpa | Yield strength min,ksi mpa | Elongation in 2in.or 50mm min% | Rockwell hardness number,max |
| TP304L | S30403 | 70[485] | 25[170] | 35 | B90 |
ASTM A249 TP304L welded stainless steel pipe mechanical property requirements do not apply to tubing smaller than 1/8in.[3.2mm] in inside diameter or 0.015 in.[0.4mm] in thickness.
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