A213 T22: “A” is the mark of ASTM steel material. “213” refers to the code sequence number, “T22” refers to the steel grade classification, “t” refers to small diameter pipe, equivalent to 12CR2MOG small diameter pipe in China.)

 

A213 T22 is a chrome molybdenum high temperature ferritic steel for boiler and superheater with ASTM A-213 / A-213m standard steel grade of 2.25Cr-lMo. It was transplanted to GB5310 in 1985 and named 12CR2MOG. Other countries also have similar steel grades, such as 10CrMo910 in Federal Germany and stba24 in Japan. In the CR -1Mo steel series, its thermal strength performance comparison draft; at the same temperature (temperature ≤ 580 ℃), its creep fracture strength and allowable stress are even higher than that of 9Cr – 1Mo steel; moreover, it has good processability, weldability and durable plasticity. Therefore, it has been widely used in the harsh working environment, such as various heating pipes and high-pressure vessels in thermal power, nuclear power and some hydrogen generating equipment.

 

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, Threaded

 

Specification of ASTM A213 T22 Boiler Tubes
Materials and Manufacture
ASTM A213 T22 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 T22Note: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 T22 Seamless Boiler Tubes

Mechanical Properties of ASTM A213 T22 Seamless Boiler Tubes
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.
 
The dimensional tolerances of ASTM A213 Seamless Boiler Tubes
Tolerances of  Wall Thickness
 
Tolerances of  Outside Diameter
 Tolerances of Length

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.
 
Surface Condition
Ferritic alloy cold-finished steel tubes are free of scale and suitable for inspection.
Ferritic alloy hot-finished steel tubes are free of loose scale and suitable for inspection.
 Note: Material furnished under ASTM A213 conform to the applicable requirements of the current edition of Specification A1016/A1016M
 
Application:


ASTM A213 T22 Seamless Boiler Tubes Marking
In addition to the marking prescribed in Specification ASTM A1016/A1016M, the marking shall indicate whether the tube is hot-finished or cold-finished.
 
Photos of ASTM A213 T22 Alloy-Steel Boiler Tubes
   






Ordering Information
It shall be the responsibility of the purchaser to specify all requirements that are necessary for products.
(1) Quantity (feet, metres, or number of lengths),
(2) Name of material (seamless tubes),
(3) Grade (T22),
(4) Condition (hot finished or cold finished),
(5) Size (outside diameter and minimum wall thickness, unless average wall thickness is specified),
(6) Length (specific or random),
(7) Hydrostatic Test or Nondestructive Electric Test,
(8) Increased sulfur