ASTM A249 TP201LN Welded stainless steel pipe specification for welded austenitic steel boiler,superheater,heat-exchanger,and condenser tubes.
ASTM A249 TP201LN chemical composition
| Grade | C | Mn | P | S | Si | Cr |
| TP201LN | 0.03 | 6.4-7.5 | 0.045 | 0.015 | 0.75 | 16.0-17.5 |
ASTM A249 TP201LN 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 |
| TP201LN | S20153 | 95[655] | 45[310] | 45 | B100 |
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 TP201LN Welded stainless steel pipe surface condition:
the tubes,after final heat treatment,shall be chemically descaled or pickled free of scale,when bright annealing is used,picking or chemical descaling is not necessary.
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