ASTM A249 TPXM-19 Welded stainless steel pipe specification for welded austenitic steel boiler,superheater,heat-exchanger,and condenser tubes.
ASTM A249 TPXM-19 chemical composition
| Grade | C | Mn | P | S | Si | Cr |
| TPXM-19 | 0.06 | 4.0-6.0 | 0.045 | 0.030 | 1.00 | 20.5-23.5 |
ASTM A249 TPXM-19 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 |
| TPXM-19 | S20910 | 100[690] | 55[380] | 35 | C25 |
GradeTP304H,TP309H,TP309HCb,TP310H,TP310HCb,TP316H,TP321H,TP347H and TP348H are modifications of grade TP304,TP309S,TP309Cb,TP310S,TP310Cb,TP316,TP321,TP347 and TP348 and are intened for high-temperature service such as superheaters and reheaters.
ASTM A249 TPXM-19 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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