ASTM A213 T911 alloy steel seamless pipe

ASTM A213 T911(K91061) alloy steel seamless pipe for boilers, superheater, and heat-exchanger
ASTM A213 T911 Grade containing the letter H in their designation have requirements different from those of similar grades not containing the letter H.
ATM A213 standard covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes.

UNS Designation: K91061
Common grades: T5, T9, T11, T21, T22, T36, T91, T92, TP304, TP304L, TP309S, TP309H, TP310S, TP310H, TP316, TP316L, TP316H, TP321, TP321H, TP347, TP3147H

Chemical Composition(%) OF A213 T911

Carbon: 0.09–0.13, Manganese: 0.30–0.60, Phosphorus: 0.02, Sufur: 0.01, Silicon: 0.10–0.50, Nickel: 0.4, Chromium: 8.5–9.5, Molybdenum: 0.90–1.10, Vanadium: 0.18–0.25, Boron: 0.0003–0.006, Niobium: 0.06–0.10

Mechanical properties for ASTM A213 T911 alloy steel seamless pipe
Tensile strength(min): 415Mpa
Yield strength(min): 220Mpa
Elongation: 30%
Delivery condition: annealed


ASTM A213 T911 alloy steel seamless pipe test

Flattening Test—One flattening test shall be made on specimens from each end of one finished tube, not the one used for the flaring test, from each lot
Flaring Test—One flaring test shall be made on specimens from each end of one finished tube, not the one used for the flattening test, from each lot
Hydrostatic or Nondestructive Electric Test—Each tube shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order.
Done is better than perfect.

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