ASTM A213/A 213M, ASME SA213 T11 are the standards for seamless alloy steel boiler tubes, superheater tubes, and heat exchanger tubes.
ASTM A213 T11 seamless alloy tubes manufactured by GNEE shall be manufactured by the seamless process and shall be hot or cold worked as specified. Sizes and thicknesses range from 1⁄8 in. [3.2 mm] ID to 5 in. [127 mm] OD and 0.015 to 0.500 in. [0.4 to 12.7 mm] OD, including the minimum wall thickness, or if specified on the order, including the average wall thickness. Other diameters may be supplied provided they meet all other requirements of this specification.
Chemical composition requirements of ASTM A213 T11 seamless steel pipe are:
C 0.05~0.15%, Mn 0.30~0.60%, P≤0.025%, S≤0.025%, Si 0.50~1.00%, Cr 1.00~1.50%, Mo 0.44~ 0.65%.
Heat Treatment of ASTM A213 T11 pipe
| Grade | UNS Number |
Heat Treat Type | Austenitizing/ Solutioning Temperature, min or range ºF [ºC] |
Cooling Media | Subcritical Annealing or Tempering Temperature, min or range ºF [ºC] |
ASTM Grain S |
| Ferritic Alloy Steels | ||||||
| T11 | K11597 | full or isothermal anneal | … | … | … | … |
| normalize and temper | … | … | 1200 [650] | … | ||
Mechanical Properties of ASTM A213 T11 Seamless Boiler Tubes
| Grade | Tensile Strength, min, ksi [MPa] |
Yield Strength, min, ksi [MPa] |
Elongation in 2 in. or 50 mm,min, % | Hardness | |
| Brinell/Vickers | Rockwell | ||||
| T11 | 60 [415] | 30 [205] | 30 | 179 HBW/ 190HV |
89 HRB |
High pressure alloy steel pipe
Manufacture:Seamless process ,Hot-finished or Cold-finished
Wall thickness(WT): 0.9 mm--12.7 mm.
Outer diameter (OD): 12.7 mm--127 mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
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