ASTM A213 T22 Ferritic Alloy-Steel Seamless Boiler Tubes
- ASTM A213/ASME SA213
- China
- Stock
- T22
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.
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. 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] | … | |||
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 |
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] | |
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:
Allowable operating temperature: it is mainly used for superheater with wall temperature ≤ 580 ° C and steam pipe and header with wall temperature ≤ 540 ° C of large capacity power station boiler such as 300. 600MW. This kind of steel has been widely used in the United States, Japan and Europe. It has a long history in power plant operation and is a mature steel with stable running and good process performance.
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.
Selection of A-213 T22 welding material
The welding methods of manual welding, gas shielded tungsten electrode or melting electrode automatic welding and submerged arc automatic welding can be adopted. E6015-b3 (heat 407) welding rod can be used for manual arc welding, and EB3 / sj110 welding wire can be used for automatic welding. T22 steel has quenching and cold crack direction. It is required to preheat 200 ~ 350 ℃ for thick wall pipe before welding, and conduct post welding heat treatment for the pipe with wall thickness more than 8mm.
Bending of A-213 T22
It is suitable for all kinds of bending processes. After cold bending, stress relief treatment is required; when the temperature of hot bending exceeds the tempering temperature, normalizing and heat treatment shall be carried out again.
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