astm a249 specification.pdf

What is ASTM A249 standard?
ASTM A249 is a standard specification for welded austenitic steel tubes used as boilers, superheaters, heat exchangers, and condensers. It covers the chemical and mechanical requirements, testing, and quality control for these tubes, which are available in various grades like TP304, TP304L, and TP316L. The specification defines the size range, dimensional tolerances, heat treatment, and surface finish requirements for the tubes.

 

ASTM A249 TP304 specification

ASTM A249 TP304 is a specification for welded austenitic stainless steel tubing used in applications like boilers, heat exchangers, and condensers. It requires a minimum tensile strength of 515 MPa, a minimum yield strength of 205 MPa, and a minimum elongation of 40% in 50mm. The specification covers the material, dimensions, tolerances, testing, and delivery conditions for this tubing, which is produced from flat-rolled strips and often bright annealed for a clean surface.

 

Chemical Composition Of ASTM A249 Stainless Steel Welded Tubes

Grade	UNS No.	EN No.	C	Cr	Ni	Mo	Others
304	S30400	1.4301	0.08	18.00 – 20.00	8.00 – 12.00	–	–
304L	S30403	1.4307	0.035	18.00 – 20.00	8.00 – 12.00	–	–
310S	S31008	1.4845	0.08	24.00 – 26.00	19.00 – 22.00	–	–
316	S31620	1.4401	0.08	16.00 – 18.00	10.00 – 14.00	2.00 – 3.00	–
316L	S31603	1.4404	0.035	16.00 – 18.00	10.00 – 14.00	2.00 – 3.00	–
316H	S31603	–	0.04 – 0.10	16.00 – 18.00	10.00 – 14.00	2.00 – 3.00	–
316Ti	S31635	1.4571	0.08	16.00 – 18.00	10.00 – 14.00	2.00 – 3.00	Ti:5X(C+N) – 0.70
317L	S31703	1.4438	0.035	18.00 – 20.00	11.00 – 15.00	3.00 – 4.00	–
321	S32100	1.4541	0.08	17.00 – 19.00	9.00 – 12.00	–	Ti:5X(C+N) – 0.70
347	S34700	1.4550	0.08	16.00 – 18.00	10.00 – 14.00	–	–
347H	S34709	1.4551	0.04 – 0.10	17.00 – 20.00	9.00 – 13.00	–	–

 

ASTM A249 Mechanical Properties

Material	Heat treatment	Temperure F (C) Min.	Hardness
			Brinell	Rockwell
TP304	Solution	1900 (1040)	192HBW/200HV	90HRB
TP304L	Solution	1900 (1040)	192HBW/200HV	90HRB
TP316	Solution	1900(1040)	192HBW/200HV	90HRB
TP316L	Solution	1900(1040)	192HBW/200HV	90HRB
TP321	Solution	1900(1040) F	192HBW/200HV	90HRB
TP347	Solution	1900(1040)	192HBW/200HV	90HRB

 

ASTM A249 Tubing Sizes

NB SIZES	SCH 5	SCH 10	SCH 40	SCH 80	SCH 160
1/8″
1/4″
3/8″
1/2″
3/4″
1″
1 1/4″
1 1/2″
2″
2 1/2″
3″
4″
5″
6″

 

Tolerances of ASTM A249 Heat Exchanger Tube

Specification	Size OD Range Inches	Tolerances
		O.D.		Wall
		Plus	Minus	Plus	Minus
ASTM-A-249	Under 1.000	.004"	.004"	10%	l0%
ASME-SA-249	1.000 to 1.500	.006"	.006"	10%	10%
Welded & Cold Worked	1.501 to 1.999	.008"	.008"	l0%	10%
Heat Exchanger Tube	2.000 to 2.499	.010"	.010"	10%	10%
Average Wall	2.500 to 2.999	.012"	.012"	10%	10%
(see Note 1)	3.000 to 4.000	.015"	.015"	10%	10%
	4.001 to 5.000	.015"	.025"	10%	10%
ASTM-A-213	Under 1.000	.004"	.004"	20%	0%
ASME-SA-213	1.000 to 1.500	.006"	.005"	20%	0%
Cold Finished Seamless	1.501 to 1.999	.008"	.008"	22%	0%
Heat Exchanger Tube	2.000 to 2.499	.010"	.010"	22%	0%
Minimum Wall	2.500 to 2.999	.012"	.012"	22%	0%
(see Note 2 & 3)	3.000 to 4.000	.015"	.015"	22%	0%
	4.001 to 5.000	.015"	.025"	22%	0%
Notes (1) Also available in minimum wall + 18/-0%. (2) Also available in average wall ± 10% (3) Also available hot finished, see

 

Welded Tube Pressure Rating For ASTM A249

What is the difference between ASTM A269 and A249?
ASTM A249 requires the weld to be cold-worked after welding, and before final heat treatment. ASTM A269 does not require any cold-working or weld bead control. ASTM A270 does not require weld bead. ASTM A554 can be supplied with the weld bead left on, and hence it complies with the "Bead Removed" option of A554.

 

What is the difference between ASTM A249 and A213?
ASTM A249 is a standard specification for welded austenitic steel boiler, superheater, heat-exchanger, and condenser tubes. ASTM A213 is a standard specification for seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes.