ASTM A213 T12 Seamless Ferritic Alloy-Steel Boiler Tubes
 
 
Standard:ASTM A213/ASME SA213
 
Standard Specification for
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
 
 
ASTM A213 covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes,.
 
 
ASTM A213 T12 Seamless Ferritic Alloy-Steel Boiler Tubes sizes and thicknesses usually furnished to this specification are 1 ⁄ 8 in. [3.2 mm] in inside diameter to 5 in [127 mm] in outside diameter and 0.015 to 0.500 in. [0.4 to 12.7 mm], inclusive, in minimum wall thickness.
 
 
 
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
 
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 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.
 
 
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
 
 
ASTM A213 T12 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.
When T12 are ordered with higher sulfur contents,the marking shall include the letter, S, following the grade designation: T2S or T12S.
 
 
Photos of ASTM A213 T12 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 (T12),
(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