ASTM A213 T22 Ferritic Alloy-Steel Seamless Boiler Tubes
ASTM A213 T22 Seamless Ferritic Alloy-Steel Boiler Tubes.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.

Description

ASTM A213 T22 Seamless Ferritic Alloy-Steel Boiler Tubes

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.

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

ASTM A213 T22 Steel
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.)

ASTM A213 T22 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

Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden) or as required
Specification of ASTM A213 T22 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 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 T22

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
T22 K21590 full or isothermal anneal … … … …
normalize and temper … 1250 [675] …

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 T22 Seamless Boiler Tubes

Grade Chemical Composition(%)
C Mn P S Si Cr Mo
A213 T22 0.05-0.15 0.30-0.60 ≤0.025 ≤0.025 ≤0.50 1.90-2.60 0.87-1.13

Mechanical Properties of ASTM A213 T22 Seamless Boiler Tubes

Grade Tensile Strength(MPa) Yield Strength(MPa) Elongation(%) Hardness(HB)
A213 T22 ≥415 ≥205 30 ≤163

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

Wall Thickness, %
Outside
Diameter
in. [mm]		 0.095 [2.4] and Under Over 0.095 to 0.150[2.4 to 3.8], incl Over 0.150 to 0.0180[3.8 to 4.6], incl Over 0.180 [4.6]
Over Under Over Under Over Under Over Under
Seamless, Hot-Finished Tubes
4 [100] and under 40 0 35 0 33 0 28 0
Over 4 [100] …. …. 35 0 33 0 28 0
Seamless, Cold-Finished Tubes
Over Under
1 1 ⁄ 2 [38.1] and under 20 0
Over 1 1 ⁄ 2 [38.1] 22 0

Tolerances of  Outside Diameter

Pecified Outside Diameter,in. [mm] Permitted Variations, in. [mm]
Over Under
Hot-Finished Seamless Tubes
4 [100] or under 1 ⁄ 64 [0.4] 1 ⁄ 32 [0.8]
Over 4 to 7 1 ⁄ 2 [100 to 200], incl 1 ⁄ 64 [0.4] 3 ⁄ 64 [1.2]
Over 7 1 ⁄ 2 to 9 [200 to 225], incl 1 ⁄ 64 [0.4] 1 ⁄ 16 [1.6]
Cold-Finished Seamless Tubes
Under 1 [25] 0.004 [0.1] 0.004 [0.11]
1 to 1 1 ⁄ 2 [25 to 40], incl 0.006 [0.15] 0.006 [0.15]
Over 1 1 ⁄ 2 to 2 [40 to 50], excl 0.008 [0.2] 0.008 [0.2]
2 to 2 1 ⁄ 2 [50 to 65], excl 0.010 [0.25] 0.010 [0.25]
2 1 ⁄ 2 to 3 [65 to 75], excl 0.012 [0.3] 0.012 [0.3]
3 to 4 [75 to 100], incl 0.015 [0.38] 0.015 [0.38]
Over 4 to 7 1 ⁄ 2 [100 to 200], incl 0.015 [0.38] 0.025 [0.64]
Over 7 1 ⁄ 2 to 9 [200 to 225], incl 0.015 [0.38] 0.045 [1.14]

Tolerances of Length

Method of
Manufacture		 Specified Outside
Diameter, in.[mm]		 Cut Length, in. [mm]
Over Under
Seamless, hot-finished All sizes 3 ⁄ 16 [5] 0 [0]
Seamless, cold-finished Under 2 [50.8] 1 ⁄ 8 [3] 0 [0]
2 [50.8] or over 3 ⁄ 16 [5] 0 [0]
2 [50.8] or over 3 ⁄ 16 [5] 0 [0]