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This specification covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes. Grades containing the letter H in their designation have requirements different from those of similar grades not containing the letter H. These different requirements provide higher creep-rupture strength than normally achievable in similar grades without these different requirements. The tubes shall be made by the seamless process and shall be either hot finished or cold finished, as specified. Grade TP347HFG shall be cold finished. Heat treatment shall be done separately and in addition to heating for hot forming. The ferritic alloy and ferritic stainless steels shall be reheated. On the other hand, austenitic stainless steel tubes shall be furnished in the heat-treated condition. Alternatively, immediately after hot forming, while the temperature of the tubes is not less than the minimum solution temperature, tubes may be individually quenched in water or rapidly cooled by other means. Tension test, hardness test, flattening test, and flaring test shall be done to each tube. Also, each tube shall be subjected to the nondestructive electric test or hydrostatic test.
Область применения1.1 This specification2 covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes, designated Grades T5, TP304, etc. These steels are listed in Tables 1 and 2.
TABLE 1 Chemical Composition Limits, %A, for Low Alloy SteelGrade
UNS Designation
Composition, %
Carbon
Manga-
nese
Phospho-
rus
Sul-
fur
Silicon
Nickel
Chromium
Molybdenum
Vana-
dium
Boron
Niobium
Nitrogen
Aluminum
Tungsten
Other Elements
T2
K11547
0.10–0.20
0.30–0.61
0.025
0.025B
0.10–0.30
...
0.50–0.81
0.44–0.65
...
...
...
...
...
...
...
T5
K41545
0.15
0.30–0.60
0.025
0.025
0.50
...
4.00–6.00
0.45–0.65
...
...
...
...
...
...
...
T5b
K51545
0.15
0.30–0.60
0.025
0.025
1.00–2.00
...
4.00–6.00
0.45–0.65
...
...
...
...
...
...
...
T5c
K41245
0.12
0.30–0.60
0.025
0.025
0.50
...
4.00–6.00
0.45–0.65
...
...
...
...
...
...
Ti 4xC–0.70
T9
K90941
0.15
0.30–0.60
0.025
0.025
0.25–1.00
...
8.00–10.00
0.90–1.10
...
...
...
...
...
...
...
T11
K11597
0.05–0.15
0.30–0.60
0.025
0.025
0.50–1.00
...
1.00–1.50
0.44–0.65
...
...
...
...
...
...
...
T12
K11562
0.05–0.15
0.30–0.61
0.025
0.025B
0.50
...
0.80–1.25
0.44–0.65
...
...
...
...
...
...
...
T17
K12047
0.15–0.25
0.30–0.61
0.025
0.025
0.15–0.35
...
0.80–1.25
...
0.15
...
...
...
...
...
...
T21
K31545
0.05–0.15
0.30–0.60
0.025
0.025
0.50–1.00
...
2.65–3.35
0.80–1.06
...
...
...
...
...
...
...
T22
K21590
0.05–0.15
0.30–0.60
0.025
0.025
0.50
...
1.90–2.60
0.87–1.13
...
...
...
...
...
...
...
T23
K40712
0.04–0.10
0.10–0.60
0.030
0.010
0.50
0.40
1.90–2.60
0.05–0.30
0.20–0.30
0.0010–
0.006
0.02–0.08
0.015
0.030
1.45–1.75
Ti 0.005–0.060
Ti/N ≥ 3.5C
T24
K30736
0.05–0.10
0.30–0.70
0.020
0.010
0.15–0.45
...
2.20–2.60
0.90–1.10
0.20–0.30
0.0015–
0.007
...
0.012
0.02
...
Ti 0.06–0.10
T36
K21001
0.10–0.17
0.80–1.20
0.030
0.025
0.25–0.50
1.00–1.30
0.30
0.25–0.50
0.02
...
0.015–0.045
0.02
0.050
...
Cu 0.50–0.80
T91
K90901
0.07–0.14
0.30–0.60
0.020
0.010
0.20–0.50
0.40
8.0–9.5
0.85–1.05
0.18–0.25
...
0.06–0.10
0.030–
0.070
0.02
...
Ti 0.01
Zr 0.01
T92
K92460
0.07–0.13
0.30–0.60
0.020
0.010
0.50
0.40
8.5–9.5
0.30–0.60
0.15–0.25
0.001–
0.006
0.04–0.09
0.030–
0.070
0.02
1.5–2.00
Ti 0.01
Zr 0.01
T122
K91271
0.07–0.14
0.70
0.020
0.010
0.50
0.50
10.0–11.5
0.25–0.60
0.15–0.30
0.0005–
0.005
0.04–0.10
0.040–
0.100
0.02
1.50–2.50
Cu 0.30–1.70
Ti 0.01
Zr 0.01
T911
K91061
0.09–0.13
0.30–0.60
0.020
0.010
0.10–0.50
0.40
8.5–9.5
0.90–1.10
0.18–0.25
0.0003–
0.006
0.06–0.10
0.040–
0.090
0.02
0.90–1.10
Ti 0.01
Zr 0.01
Grade
UNS Designation
Composition
Carbon
Manga-
nese
Phospho-
rus
Sulfur
Silicon
Chromium
Nickel
Molybdenum
NitrogenB
Niobium
Titanium
Other Elements
TP201
S20100
0.15
5.5–7.5
0.060
0.030
1.00
16.0–18.0
3.5–5.5
...
0.25
...
...
...
TP202
S20200
0.15
7.5–10.0
0.060
0.030
1.00
17.0–19.0
4.0–6.0
...
.025
...
...
...
XM-19
S20910
0.06
4.0–6.0
0.045
0.030
1.00
20.5–23.5
11.5–13.5
1.50–3.00
0.20–0.40
0.10–0.30
...
V 0.10–0.30
S21500
0.06–0.15
5.5–7.0
0.045
0.030
0.20–1.00
14.0–16.0
9.0–11.0
0.80–1.20
...
0.75–1.25
...
B 0.003–
0.009,
V 0.15–0.40
S25700
0.02
2.00
0.025
0.010
6.5–8.0
8.0–11.5
22.0–25.0
0.50
...
...
...
...
TP304
S30400
0.08
2.00
0.045
0.030
1.00
18.0–20.0
8.0–11.0
...
...
...
...
...
TP304L
S30403
0.035D
2.00
0.045
0.030
1.00
18.0–20.0
8.0–12.0
...
...
...
...
...
TP304H
S30409
0.04–0.10
2.00
0.045
0.030
1.00
18.0–20.0
8.0–11.0
...
...
...
...
...
S30432
0.07–0.13
1.00
0.040
0.010
0.30
17.0–19.0
7.5–10.5
...
0.05–0.12
0.30–0.60
...
Al 0.003–
0.030,
B 0.001–
0.010,
Cu 2.5–3.5
S30434
0.07–0.14
2.00
0.040
0.010
1.00
17.5–19.5
9.0–12.0
...
...
0.10–0.40E
0.10–0.25E
B 0.001–
0.004
Cu 2.50–
3.50
TP304N
S30451
0.08
2.00
0.045
0.030
1.00
18.0–20.0
8.0–11.0
...
0.10–0.16
...
...
...
TP304LN
S30453
0.035D
2.00
0.045
0.030
1.00
18.0–20.0
8.0–11.0
...
0.10–0.16
...
...
...
S30615
0.016–0.24
2.00
0.030
0.030
3.2–4.0
17.0–19.5
13.5–16.0
...
...
...
...
Al 0.8–1.5
S30815
0.05–0.10
0.80
0.040
0.030
1.40–2.00
20.0–22.0
10.0–12.0
...
0.14–0.20
...
...
Ce 0.03–0.08
TP309S
S30908
0.08
2.00
0.045
0.030
1.00
22.0–24.0
12.0–15.0
...
...
...
...
...
TP309H
S30909
0.04–0.10
2.00
0.045
0.030
1.00
22.0–24.0
12.0–15.0
...
...
...
...
...
TP309LMoN
S30925
0.025
2.00
0.040
0.030
0.70
23.0–26.0
13.0–16.0
0.5–1.2
0.25–0.40
...
...
...
TP309Cb
S30940
0.08
2.00
0.045
0.030
1.00
22.0–24.0
12.0–16.0
...
...
10xC–1.10
...
...
TP309HCb
S30941
0.04–0.10
2.00
0.045
0.030
1.00
22.0–24.0
12.0–16.0
...
...
10xC-1.10
...
...
...
S30942
0.03–0.10
2.00
0.040
0.030
1.00
21.0–23.0
14.5–16.5
0.10–0.20
0.50–0.80
B=0.001–0.005
S31002
0.02
2.00
0.020
0.015
0.15
24.0–26.0
19.0–22.0
0.10
0.10
...
...
...
TP310S
S31008
0.08
2.00
0.045
0.030
1.00
24.0–26.0
19.0–22.0
...
...
...
...
...
TP310H
S31009
0.04–0.10
2.00
0.045
0.030
1.00
24.0–26.0
19.0–22.0
...
...
...
...
...
TP310MoCbN
S31025
0.10
1.50
0.030
0.030
1.00
19.5–23.0
23.0–26.0
1.0–2.0
0.10–0.25
0.10–0.40
0.20
B 0.002–
0.010
S31035
0.04–0.10
0.60
0.030
0.015
0.40
21.5–23.5
23.5–26.5
...
0.15–0.30
0.30–0.60
...
W 2.0–4.0
Co 1.0–2.0
Cu 2.0–3.5
B 0.002–
0.008
TP310Cb
S31040
0.08
2.00
0.045
0.030
1.00
24.0–26.0
19.0–22.0
...
...
10xC-1.10
...
...
TP310HCb
S31041
0.04–0.10
2.00
0.045
0.030
1.00
24.0–26.0
19.0–22.0
...
...
10xC-1.10
...
...
TP310HCbN
S31042
0.04–0.10
2.00
0.045
0.030
1.00
24.0–26.0
19.0–22.0
...
0.15–0.35
0.20–0.60
...
...
TP310MoLN
S31050
0.025
2.00
0.020
0.030
0.40
24.0–26.0
21.0–23.0
2.00–3.00
0.10–0.16
...
...
...
S31060
0.05–0.10
1.00
0.040
0.030
0.50
22.0–24.0
10.0–12.5
...
0.18–0.25
...
...
Ce + La
0.025–0.070
B 0.001–0.010
S31254
0.020
1.00
0.030
0.010
0.80
19.5–20.5
17.5–18.5
6.0–6.5
0.18–0.22
...
...
Cu 0.50–1.00
S31272
0.08–0.12
1.50–2.00
0.030
0.015
0.30–0.70
14.0–16.0
14.0–16.0
1.00–1.40
...
...
0.30–0.60
B 0.004–
0.008
S31277
0.020
3.00
0.030
0.010
0.50
20.5–23.0
26.0–28.0
6.5–8.0
0.30–0.40
...
...
Cu 0.50–1.50
TP316
S31600
0.08
2.00
0.045
0.030
1.00
16.0–18.0
10.0–14.0
2.00–3.00
...
...
...
...
TP316L
S31603
0.035D
2.00
0.045
0.030
1.00
16.0–18.0
10.0–14.0
2.00–3.00
...
...
...
...
TP316H
S31609
0.04–0.10
2.00
0.045
0.030
1.00
16.0–18.0
11.0–14.0
2.00–3.00
...
...
...
...
TP316Ti
S31635
0.08
2.00
0.045
0.030
0.75
16.0–18.0
10.0–14.0
2.00–3.00
0.10
...
5X
(C + N)–
0.70
...
TP316N
S31651
0.08
2.00
0.045
0.030
1.00
16.0–18.0
10.0–13.0
2.00–3.00
0.10–0.16
...
...
...
TP316LN
S31653
0.035D
2.00
0.045
0.030
1.00
16.0–18.0
10.0–13.0
2.00–3.00
0.10–0.16
...
...
...
TP317
S31700
0.08
2.00
0.045
0.030
1.00
18.0–20.0
11.0–15.0
3.0–4.0
...
...
...
...
TP317L
S31703
0.035
2.00
0.045
0.030
1.00
18.0–20.0
11.0–15.0
3.0–4.0
...
...
...
...
TP317LM
S31725
0.03
2.00
0.045
0.030
1.00
18.0–20.0
13.5–17.5
4.0–5.0
0.20
...
...
Cu 0.75
TP317LMN
S31726
0.03
2.00
0.045
0.030
1.00
17.0–20.0
13.5–17.5
4.0–5.0
0.10–0.20
...
...
Cu 0.75
S32050
0.030
1.50
0.035
0.020
1.00
22.0–24.0
20.0–23.0
6.0–6.8
0.21–0.32
...
...
Cu 0.40
TP321
S32100
0.08
2.00
0.045
0.030
1.00
17.0–19.0
9.0–12.0
...
...
...
5(C + N)–
0.70
...
TP321H
S32109
0.04–0.10
2.00
0.045
0.030
1.00
17.0–19.0
9.0–12.0
...
...
...
4(C + N)–
0.70
...
S32615
0.07
2.00
0.045
0.030
4.8–6.0
16.5–19.5
19.0–22.0
0.30–1.50
...
...
...
Cu 1.50–
2.50
S33228
0.04–0.08
1.00
0.020
0.015
0.30
26.0–28.0
31.0–33.0
...
...
0.60–1.00
...
Ce 0.05–
0.10,
Al 0.025
S34565
0.030
5.0–7.0
0.030
0.010
1.00
23.0–25.0
16.0–18.0
4.0–5.0
0.40–0.60
0.10
...
...
TP347
S34700
0.08
2.00
0.045
0.030
1.00
17.0–20.0
9.0–13.0
...
...
10xC–1.10
...
...
TP347W
S34705
0.05
2.00
0.040
0.030
1.00
17.0–20.0
8.00–11.0
...
0.10–0.25
0.25–0.50
...
V 0.20–0.50
W 1.50–2.60
TP347H
S34709
0.04–0.10
2.00
0.045
0.030
1.00
17.0–19.0
9.0–13.0
...
...
8xC–1.10
...
...
TP347HFG
S34710
0.06–0.10
2.00
0.045
0.030
1.00
17.0–19.0
9.0–13.0
...
...
8xC–1.10
...
...
TP347LN
S34751
0.005–0.020
2.00
0.045
0.030
1.00
17.0–19.0
9.0–13.0
...
0.06–0.10
0.20–0.50F
...
...
TP348
S34800
0.08
2.00
0.045
0.030
1.00
17.0–19.0
9.0–13.0
...
...
...
Co 0.20, Ta 0.10
TP348H
S34809
0.04–0.10
2.00
0.045
0.030
1.00
17.0–19.0
9.0–13.0
...
...
...
Co 0.20, Ta 0.10
...
S35045
0.06–0.10
1.50
0.045
0.015
1.00
25.0–29.0
32.0–37.0
...
...
...
0.15–0.60
Al 0.15–0.60
Cu 0.75
XM-15
S38100
0.08
2.00
0.030
0.030
1.50–2.50
17.0–19.0
17.5–18.5
...
...
...
...
...
...
S38815
0.030
2.00
0.040
0.020
5.5–6.5
13.0–15.0
15.0–17.0
0.75–1.50
...
...
...
Cu 0.75–1.50
Al 0.30
Alloy 20
N08020
0.070
2.00
0.045
0.035
1.00
19.0-21.0
32.0-38.0
2.00-3.00
...
...
Cu 3.00-4.00
N08367
0.030
2.00
0.040
0.030
1.00
20.0-22.0
23.5-25.5
6.00-7.00
0.18-0.25
...
...
Cu 0.75
800
N08800
0.10
1.50
0.045
0.015
1.00
19.0–23.0
30.0–35.0
...
...
Cu 0.75
Al 0.15–0.60
Ti 0.15–0.60
FeI 39.5 min
800H
N08810
0.05–0.10
1.50
0.045
0.015
1.00
19.0–23.0
30.0–35.0
...
...
Cu 0.75
Al 0.15–0.60
Ti 0.15–0.60
FeI 39.5 min
...
N08811
0.06–0.10
1.50
0.045
0.015
1.00
19.0–23.0
30.0–35.0
...
...
Cu 0.75
Al 0.15–0.60J
Ti 0.15–0.60J
FeI 39.5 min
N08904
0.020
2.00
0.040
0.030
1.00
19.0–23.0
23.0–28.0
4.0–5.0
0.10
Cu 1.00–2.00
...
N08925
0.020
1.00
0.045
0.030
0.50
19.0–21.0
24.0–26.0
6.0–7.0
0.10–0.20
...
...
Cu 0.80–1.50
...
N08926
0.020
2.00
0.030
0.010
0.50
19.0–21.0
24.0–26.0
6.0–7.0
0.15–0.25
...
...
Cu 0.50–1.50
TP444
S44400
0.03
1.00
0.040
0.030
1.00
17.5–19.5
1.75–2.50
0.035
...
...
A Maximum, unless a range or minimum is indicated. Where ellipses (...) appear in this table, there is no minimum and analysis for the element need not be determined or reported.B The method of analysis for Nitrogen shall be a matter of agreement between the purchaser and the producer.C For these alloys, there is no common grade designation. The UNS number uniquely identifies these alloys.D For small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.040% is necessary in Grades TP304L, TP304LN, TP316L, and TP316LN.E Grade S30434 shall have (Ti + 1/2 Nb) of not less than 2 times and not more than 4 times the carbon content.F Grade TP347LN shall have an Nb content of not less than 15 times the carbon content.G Grade TP348 shall have an Nb + Ta content of not less than 10 times the carbon content and not more than 1.10%.H Grade TP348H shall have an Nb + Ta content of not less than 8 times the carbon content and not more than 1.10%.I Iron shall be determined arithmetically by difference of 100 minus the sum of the other specified elements.J (Al + Ti) 0.85–1.20.K Grade TP444 shall have Ni + Cu = 1.00 max.L Grade TP444 shall have Ti + Nb = 0.20 + 4(C + N)–0.80.M N08020 shall have an Nb + Ta content of not less than 8 times the carbon content and not more than 1.00%.1.2 Grades containing the letter, H, in their designation, have requirements different from those of similar grades not containing the letter, H. These different requirements provide higher creep-rupture strength than normally achievable in similar grades without these different requirements.
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] in outside diameter and 0.015 to 0.500 in. [0.4 to 12.7 mm], inclusive, in minimum wall thickness or, if specified in the order, average wall thickness. Tubing having other diameters may be furnished, provided such tubes comply with all other requirements of this specification.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.