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ASTM A249 / ASME SA249 / Welded Austentic Steel Boiler Superheater Heat Exchanger and Condenser Tubes supplier & distributor in India

PIPE & TUBE ASTM STANDARDS

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ASTM A249M-88b / ASME SA249 

Welded Austentic Steel Boiler Superheater Het Exchanger and Condenser Tubes

This standard is issued under the fixed designation A 249/A 249M; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon ( ε) indicates an editorial change since the last revision or reapproval. 

1.Scope 

1.1 This specification covers nominal-wall-thickness welded tubes made from the austenitic steels listed in Table 1, with various grades intended for such use as boiler, superheater, heat exchanger, or condensed tubes.

1.2 Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, TP316H, TP321H, TP347H, and TP348H are modifications of Grades TP304, TP309S, TP309Cb, TP310S, TP310Cb, TP316, TP321,TP347, and TP348, and are intended for high-temperature service such as for superheaters and reheaters.

1.3 The tubing sizes and thicknesses usually furnished to this specification are 1/8 in. [3.2 mm] in inside diameter to 5 in. [127 mm] i outside diameter and 0.015 to 0.320 in. [o.4 to 8.1 mm], inclusive, in wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.

1.4 Mechanical property requirements do not apply to tubing smaller tan 1/8 in. [3.2 mm] in inside diameter or 0.015 in. [0.4 mm] in thickness.

1.5 Optional supplementary requirements are provided and, when one or more of these are desired, each shall be so stated in the order.

1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

1.7 The following safety hazards caveat pertains only to the test method described in the Supplementary Requirement of this specification. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate of regulatory limitations prior to use. A specific warning statement is given in Supplementary Requirement S7, Note 5.
Grade   Remaks (Similar to JIS) Possibility Temperature
   
TP201     -
TP202     -
TP304     (SUS304TB)
TP304H     (SUS304HTB)
TP304L     (SUS304LTB)
TP304N     -
TP304LN     -
TP305     -
TP309Cb     -
TP309H     -
TP309HCb     -
TP309S     (SUS309TB)
TP310Cb     -
TP310H     -
TP310HCb     -
TP310S     (SUS310STB)
TP316     (SUS316TB)
TP316H     (SUS316HTB)
TP316L     (SUS316LTB)
TP316N     -
TP316LN     -
TP317     (SUS317TB)
TP317L     (SUS317LTB)
TP321     (SUS321TB)
TP321H     (SUS321HTB)
TP347     (SUS347TB)
TP347H     (SUS347HTB)
TP348     -
TP348H     -
XM-15     -
XM19     -
XM29     -
S31050     -
S31254     -
S30815     -
S31725     -
S31726     -


Chemical Requirements %


Grade Composition, %
TP
201
TP
202
TP
304
TP
304H
TP
304L
TP
304N
TP
304LN
TP
305
TP
309Cb
TP
309H
TP
309HCb
TP
309S
TP
310Cb
TP
310H
TP
310HCb
TP
310S
TP
316
TP
316H
TP
316L
UNS 
Desig-
nation A
S201
00
S202
00
S304
00
S304
09
S304
03
S304
51
S304
53
S305
00
S309
40
S309
09
S309
41
S309
08
S310
40
S310
09
S310
41
S310
08
S316
00
S316
09
S316
03
Carbon 0.15
max
0.15
max
0.08
max
0.04-
0.10
0.035
max B
0.08
max
0.035
max B
0.12
max
0.08
max
0.04-0.10 0.04-
0.10
0.08
max
0.08
max
0.04-
0.10
0.04-
0.10
0.08
max
0.08
max
0.04-
0.10
0.035
max B
Manganese,
m ax H
5.50-
7.50
7.50-
10.0
2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00
Phosphorus,
max
0.060 0.060 0.040 0.040 0.040 0.040 0.040 0.045 0.045 0.040 0.045 0.045 0.045 0.040 0.045 0.045 0.040 0.040 0.040
Sulfur,
max
0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030
Silicon,
max
1.00 1.00 0.75 0.75 0.75 0.75 0.75 1.00 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75
Nickel 3.50-
5.50
4.00-
6.00
8.00-
11.0
8.00-
11.0
8.00-
13.0
8.00-
11.0
8.00-
13.0
8.00-
13.0
12.0-
16.0
12.0-
15.0
12.0-
16.0
12.0-
15.0
12.0-
22.0
12.0-
22.0
12.0-
22.0
12.0-
22.0
12.0-
14.0
12.0-
14.0
12.0-
15.0
Chromium 16.0-
18.0 
17.0-
19.0
18.0-
20.0 
18.0-
20.0 
18.0-
20.0
18.0-
20.0
18.0-
20.0
17.0-
19.0
22.0-
24.0
22.0-
24.0
22.0-
24.0
22.0-
24.0
24.0-
26.0
24.0-
26.0
24.0-
26.0
24.0-
26.0
16.0
18.0
16.0-
18.0
16.0-
18.0
Molybde-
num
                0.75
max
  0.75
max
0.75
max
0.75
max
  0.75
max
0.75
max
2.00-
3.00
2.00-
3.00
2.00-
3.00
Titanium                                      
Columbium
+tantalum
                10xC
min
1.10
max
  10xC
min
1.10
max
  10xC
min
1.10
max
  10xC
min
1.10
max
       
Tantalum,
max
                                     
Nitrogen G 0.25
max
0.25
max
      0.10-
0.16
0.10-
0.16
                       
Vanadium                                      
Others                                      


TABLE 1 Continued


Grade Composition, %
TP
316N
TP
316LN
TP
317
TP
317L
TP
321
TP
321H
TP
347
TP
347H
TP
348
TP
348H
XM-15 TP
XM-19
TP
XM-29
           
UNS 
Desig-
nation A
S316
51
S316
53
S317
00
S317
03
S321
00
S321
09
S347
00
S347
09
S348
00
S348
09
S381
00
S209
10
S240
00
S310
50
S312
54
S308
15
S317
25
S317
26
S245
65
Carbon 0.08
max
0.035
max
0.08
max
0.35
max
0.08
max
0.04-
0.10
>0.08
max
0.04-
0.10
>0.08
max
0.04-
0.10
0.08
max
0.06
max
0.08
max
0.025
max
0.02
max
0.05-
0.10
0.03
max 
0.03
max
0.08
max
Manganese,
m ax H
2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 4.00-
6.00
11.5-
14.5
2.00 1.00 0.80 2.00 2.00 2.00
Phosphorus,
max
0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.04 0.040 0.04 0.03 0.04 0.04 0.020 0.03 0.04 0.045 0.045 0.040
Sulfur,
max
0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.03 0.03 0.03 0.015 0.01 0.03 0.030 0.030 0.030
Silicon,
max
0.75 0.75 0.75
max
0.75
max
0.75
max
0.75
max
0.75
max
0.75
max
0.75
max
0.75
max
1.50-
2.50
1.00
max
1.00
max
0.4
max
0.80
max
1.40-
2.00
0.75
max
0.75
max
0.75
max
Nickel 12.0-
14.0
12.0-
15.0
11.00-
14.0
11.00-
15.0
9.00-
13.0
9.00-
13.0
9.00-
13.0
9.00-
13.0
9.00-
13.0
9.00-
13.0
17.5-
18.5
11.5
13.5
2.25-
3.75
20.5
23.5
17.5-
18.5
10.0-
12.0
13.5-
17.5
13.5-
17.5
12.0-
14.0
Chromium 16.0-
18.0
16.0-
18.0
18.0-
20.0 
18.0-
20.0 
17.0-
20.0
17.0-
20.0
17.0-
20.0
17.0-
20.0
17.0-
20.0
17.0-
20.0
17.0-
19.0
22.5-
23.5
17.0-
19.0
24.0-
26.0
19.5-
20.5
20.0-
22.0
18.0-
20.0
17.0-
20.0
16.0
18.0
Molybde-
num
2.00-
3.00
2.00-
3.00
3.00-
4.00
3.00-
4.00
              1.50-
3.00
  1.6-
2.6
6.00-
6.50
  4.0-
5.0
4.0-
5.0
2.00-
3.00
Titanium         C E                          
Columbium
+tantalum
            D F D F   0.10-
0.30
            0.1
max
Tantalum,
max
                0.10 0.10                  
Nitrogen G 0.1`````0-
0.16
0.10-
0.16
                  0.20-
0.40
0.20-
0.40
0.09-
0.15
0.18-
0.22
0.14-
0.20
0.10
max
0.10-
0.20
0.4-
0.6
Vanadium                       0.10-
0.30
             
Others                             Cu 0.50-
1.00
Ce
0.03-
0.08
Cu 0.75
max
Cu 0.75
max
 


A New designation established in accordance withe Practice E527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS).
For small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.040 % is necessary in Grades TP 304L and TP 316L, Small outside diameter tubes are defined as those less than 0.500 in. [12.7 mm] in outside diameter and light wall are those less than 0.049 in. [1.2 mm]in average wall thickness (0.44 in. [1.1 mm] in minimum wall thickness).
C Grade TP 321 shall have a titaninu content of not less than five times the carbon content and not more than 0.070 %.
D Grade TP 347 and TP 348shall have a columbium plus tantalum content of not less than ten times the carbon content and not more than 1.0 %.
E Grade TP 3321H shall have a titanium content of not less than four times the carbon content and not more than 0.60 %.
F Grade TP347H and TP 348H shall have a columbium plus tantalum content of not less than eight times the carbon content and not more than 1.0 %.
G The method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.
H Maximum, unless otherwise indicated.TABLE 2 Number of Tubes in a Lot Heat Treated by the Continuous Process 


Size of Tube Size of LOT
2 in. [50.8 mm] and over in outside diameter and 0.200 in. [5.1 mm] and over in wall thickness
not more than 50 tubes
Less than 2 in [50.8 mm] but over 1 in. [25.4 mm]
in outside diameter or over 1 in. [25.4 mm] in outside diameter 
and under 0.200 in. [5.1 mm] in wall thickness

not more than 75 tubes
1 in. [25.4 mm] or less in outside diameter
not more than 125 tubes


Grade UNS
DESIGNATION
Tensile
Strength,
min, ksi
[MPa]
Yield
Strength,
min, ksi
[MPA]
Elongation
in 2 in. or
50 mm,
min, %
Rockwell
Hardness
Number,
max
TP201 S20100 95 [655] 38 [260] 35 B95
TP202 S20200 90 [620] 38 [260] 35 B95
TP304 S30400 75 [515] 30 [205] 35 B90
TP304H S30409 70 [515] 30 [205] 35 B90
TP304L S30403 80 [550] 25 [170] 35 B90
TP304N S30451 75 [515] 35 [240] 35 B90
TP304LN S30453 75 [515] 30 [205] 35 B90
TP305 S30500 75 [515] 30 [205] 35 B90
TP309Cb S30940 75 [515] 30 [205] 35 B90
TP309H S30909 75 [515] 30 [205] 35 B90
TP309HCb S30941 75 [515] 30 [205] 35 B90
TP310S S30908 75 [515] 30 [205] 35 B90
TP310Cb S31040 75 [515] 30 [205] 35 B90
TP310H S31009 75 [515] 30 [205] 35 B90
TP310HCb S31041 75 [515] 30 [205] 35 B90
TP310S S31008 75 [515] 30 [205] 35 B90
TP316 S31600 75 [515] 30 [205] 35 B90
TP316H S31609 75 [515] 30 [205] 35 B90
TP316L S31603 70 [485] 70 [485] 35 B90
TP316N S31651 80 [550] 80 [550] 35 B90
TP316LN S31653 75 [515] 75 [515] 35 B90
TP317 S31700 75 [515] 75 [515] 35 B90
TP317L S31703 75 [515] 75 [515] 35 B90
TP321 S32100 75 [515] 75 [515] 35 B90
TP321H S32109 75 [515] 75 [515] 35 B90
TP347 S34700 75 [515] 75 [515] 35 B90
TP347H S34709 75 [515] 75 [515] 35 B90
TP348 S34800 75 [515] 75 [515] 35 B90
TP348H S34809 75 [515] 75 [515] 35 B90
TPXM-15 S38100 75 [515] 75 [515] 35 B90
TPXM-19 S20910 100 [690] 55 [380] 35 C25
TPXM-29 S24000 100 [690] 55 [380] 35 B100
S31050:
t ≤ 0.25 in. 84 [580] 39 25 B95
t ? 0.25 in. 78 37 35 B96
S31254 94 44 35 B95
S30815 87 45 35 B90
S31725 75 30 35 B90
S31726 80 35 35 B90
S24565 115 60 35 B100


A Not applicable to tubes than 1/8 in. [3.2 mm] in outside diameter or having wall thickness below 0.015 in. [0.4 mm], or both. The tensile properties of such small diameter or thin wall tubes shall be a matter of agreement between the manufacturer and the purchaser. 

R = WO-W

BO-B


where:
WO=average weld-metal thickness before the test,
W= average weld-metal thickness after the test,
BO= average base-metal thickness before the test, and
B= average base-metal thickness after the test.
S7.9.1 A corrosion ration of 1.25 or less is satisfactory. but other values may be specified upon agreement between the producer and purchaser.

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