ASTM A213 T12 Ferritic Alloy-Steel Seamless Boiler Tubes
ASTM A213 T12 belongs to 1Cr-1 / 2Mo pearlescent low alloy hot strength steel. A213t12 steel has good processing and welding properties, and has high thermal strength and oxidation resistance under 550 ℃.

Description

ASTM A213 T12 Seamless Ferritic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes

Standard:ASTM A213/ASME SA213
Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes

ASTM A213 T12 Steel

ASTM A213 T12 belongs to 1Cr-1 / 2Mo pearlescent low alloy hot strength steel. A213t12 steel has good processing and welding properties, and has high thermal strength and oxidation resistance under 550 ℃.
Application of ASTM A213 T12 Steel Tubes
A213 T12 steel tubes are close to 15CrMoG steel tubes in gb5310, which are widely used in boiler superheater, reheater and other heating surface piping, header and main steam pipeline with working temperature not exceeding 550 ℃ such as 300MW and 600MW.

Equivalent steel grade

Standard Grade
ASTM A213 T12
GB5310 15CrMoG

ASTM A213 T12 Seamless Ferritic Alloy-Steel Boiler Tubes Quick Details
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

Specification of ASTM A213 T12 Boiler Tubes

OD (mm) Wall Thickness(mm)
2 2.5 3 3.5 4 4.5 5 6 6.5-7 7.5-8 8.5-9 9.5-10 11 12
Φ25-Φ28 ● ● ● ● ● ●
Φ32 ● ● ● ● ● ●
Φ34-Φ36 ● ● ● ● ● ●
Φ38 ● ● ● ● ● ●
Φ40 ● ● ● ● ●
Φ42 ● ● ● ● ●
Φ45 ● ● ● ● ● ●
Φ48-Φ60 ● ● ● ● ● ● ●
Φ63.5 ● ● ● ● ● ● ●
Φ68-Φ73 ● ● ● ● ● ●
Φ76 ● ● ● ● ● ● ● ● ● ●
Φ80 ● ● ● ● ● ● ● ● ● ●
Φ83 ● ● ● ● ● ● ● ● ● ●
Φ89 ● ● ● ● ● ● ● ● ● ●
Φ95 ● ● ● ● ● ● ● ● ● ●
Φ102 ● ● ● ● ● ● ● ● ● ●
Φ108 ● ● ● ● ● ● ● ● ● ●
Φ114 ● ● ● ● ● ● ● ● ●
Φ121 ● ● ● ● ● ● ● ● ●
Φ127 ● ● ● ● ● ● ● ● ●

Materials and Manufacture
ASTM A213 T12 Seamless Ferritic Alloy-Steel Boiler Tubes are made by the seamless process and shall be either hot finished or cold finished, as specified.

Grain Size
Grain size shall be as given in Table 1,
Grain size determinations, shall be made on one end of one finished tube from each lot.

Heat Treatment of ASTM A213 T12

TABLE 1 Heat Treatment and Grain Size Requirements
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
T12 K11562 full or isothermal anneal … … … …
normalize and temper … … … …
subcritical anneal … … 1200 to 1350[650 to 730] …

Note:1.Heat treatment shall be carried out separately and in addition to heating for hot forming.
2.ASTM Grain Size No. listed, or coarser, unless otherwise indicated.

Chemical Composition of ASTM A213 T12 Seamless Boiler Tubes

Grade Chemical Composition(%)
C Mn P S Si Cr Mo
A213 T12 0.05-0.15 0.30-0.60 ≤0.025 ≤0.025 ≤0.50 0.80-1.25 0.45-0.65

Mechanical Properties of ASTM A213 T12 Seamless Boiler Tubes

Low Alloy Steels
Grade UNS
Designation		 Tensile
Strength,
min, ksi[MPa]		 Yield
Strength,
min, ksi[MPa]		 Elongation
in 2 in. or
50 mm,
min, %		 Hardness
Brinell/Vickers Rockwell
T12 K11562 60 [415] 32 [220] 30 163 HBW/
170 HV		 85 HRB

Mechanical property requirements do not apply to tubing smaller than 1 ⁄ 8in. [3.2 mm] in inside diameter or thinner than 0.015 in. [0.4 mm] in thickness.

Hydrostatic or Nondestructive Electric Test
Each tube will be subjected to the nondestructive electric test or the hydrostatic test.

Tests
(1)Tension test——One tension test shall be made on a specimen from one tube for lots of not more than 50 tubes. Tension tests shall be made on specimens from two tubes for lots of more than 50 tubes.
(2)Hardness Requirements—— Brinell, Vickers, or Rockwell hardness tests shall be made on specimens from two tubes from each lot.
(3)Flattening Test——One flattening test shall be made on specimens from each end of one finished tube.
(4)Flaring Test——One flaring test shall be made on specimens from each end of one finished tube.