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

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
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, %
Grade	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, %
Grade	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).
B 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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