ASTM A688 Welded Austenitic Stainless Steel Feedwarter Heater Tubes
 
 
Size range: O.D.: 4.0-230mm     W.T.:1-30mm      L: according to customer requirement
 

Mechanical Requirement
Grade:	TP304	TP304L	TP304LN	TP316	TP316L	TP316LN	TP316LN	TPXM-29	TP304N
UNS	S30400	S30403	S30453	S31600	S31603	S31653	S31653	S24000	S30451
C, max	0.08	0.035	0.035	0.080	0.035	0.035	0.035	0.08	0.080
Mn, max	2.00	2.00	2.00	2.00	2.00	2.00	2.00	11.5-14.5	2.00
P, max	0.045	0.045	0.045	0.045	0.045	0.045	0.045	0.060	0.045
S, max	0.030	0.030	0.030	0.030	0.030	0.030	0.030	0.030	0.030
Si, max	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00
Ni	18.0-20.0	18.0-20.0	18.0-20.0	16.0-18.0	16.0-18.0	16.0-18.0	16.0-18.0	17.0-19.0	18.0-20.0
Cr	8.0-11.0	8.0-13.0	8.0-12.0	11.0-14.0	10.0-14.0	11.0-14.0	11.0-14.0	2.3-3.7	8.0-18.0
Mo	…	…	…	2.00-3.00	2.00-3.00	2.00-3.00	2.00-3.00	…	…
Nitrogen	…	…	…	…	…	…	…	…	…
Copper	…	…	…	…	…

 

Grade:	TP316N	…	…	…	…
UNS	S31651	N08367	N08926	S31254	S32654
C, max	0.070	0.030	0.020	0.020	0.020
Mn, max	2.00	2.00	2.00	1.00	2.0-4.0
P, max	0.045	0.040	0.030	0.030	0.030
S, max	0.030	0.030	0.010	0.100	0.005
Si, max	4.8-6.0	1.00	0.50	0.80	0.50
Ni	9.58.0	20.0-22.0	24.0-26.0	19.5-20.5	21.0-23.0
Cr	19.0-22.0	23.5-25.5	19.0-21.0	17.5-18.5	24.0-25.0
Mo	0.30-1.50	6.0-7.0	6.0-7.0	6.0-6.5	7.0-8.0
Nitrogen	…	…	…	…	0.45-0.55
Copper	…	…	…		0.30-0.60

 

Tensil Requirements
Grade and UNS			Tensile strength min ksi [Mpa]			Yield strength min ksi [Mpa]		Elongation in 2in or 50mm min %
304, 316 S30400, S31600			75 [515]			30 [205]		35
304L, 316L S30403, S31603			70 [485]			25 [175]		35
XM-29 S24000			100 [690]			55 [380]		35
304N, 316N S30451, S31651			80 [550]			35 [240]		20
304LN, 316LN S30453, S31653			75 [515]			30 [205]		35
N08367  t≤0.187			100 [690]			45 [310]		30
N08367  t＞0.187			95 [655]			45 [310]		30
N08926			94 [650]			45 [310]		35
S31254   t≤0.187			100 [690]			45 [310]		35
S21254   t＞0.187			95 [655]			45 [310]		35
S32654			120 [825]			65 [450]		40

 

Permissible Variations in Dimensions
Group	Size, Outside Diameter, in(mm)			Permissible Variations in Outside Diameter, in.[mm]		Permissible Variations in WT, %	Permisible Variations in Cut Length, in[mm]       Over                Under
1	Up to 1/2(12.7), excl			±0.005[0.13]		±15	1/8[3]		0
2	1/2 to 1 1/2(12.7 to 38.1 excl			±0.005[0.13]		±10	1/8[3]		0
3	1 1/2 to 3 1/2(38.1 to 88.9 excl			±0.010[0.25]		±10	3/16[5]		0
4	3 1/2 to 5 1/2(88.9 to 139.7 excl			±0.015[0.38]		±10	3/16[5]		0
5	5 1/2 to 5 1/2(139.7 to 230.2 excl			±0.030[0.76]		±10	3/16[5]		0