ASTM A268 Steel Pipe
This specification covers a number of grades of nominal-wall-thickness, stainless steel tubing for general corrosion-resisting and high-temperature service. Most of these grades are commonly known as the “straight-chromium” types and are characterized by being ferromagnetic. Two of these grades, TP410 and UNS S 41500 (Table 1), are amenable to hardening by heat treatment, and the high-chromium, ferritic alloys are sensitive to notch-brittleness on slow cooling to ordinary temperatures. These features should be recognized in the use of these materials. Grade TP439 is used primarily for hot-water tank service and does not require post-weld heat treatment to prevent attack of the heat affected zone.
|
Chemical Composition of Material |
Material Composition |
201 |
202 |
304 |
316L |
430 |
|
C |
=0.15 |
=0.15 |
=0.08 |
=0.035 |
=0.12 |
|
|
Si |
=1.00 |
=1.00 |
=1.00 |
=1.00 |
=1.00 |
|
|
Mn |
5.5-7.5 |
7.5-10 |
=2.00 |
=2.00 |
=1.00 |
|
|
P |
=0.06 |
=0.06 |
=0.045 |
=0.045 |
=0.040 |
|
|
S |
=0.03 |
=0.03 |
=0.030 |
=0.030 |
=0.030 |
|
|
Cr |
13-15 |
14-17 |
18-20 |
16-18 |
16-18 |
|
|
Ni |
0.7-1.1 |
3.5-4.5 |
8-10.5 |
10-14 |
||
|
Mo |
2.0-3.0 |
|||||
|
Mechanical Property |
Material Item |
201 |
202 |
304 |
316 |
|
|
Tensile Strength |
=535 |
=520 |
=520 |
=520 |
||
|
Yield Strength |
=245 |
=205 |
=205 |
=205 |
||
|
Extension |
=30% |
=30% |
=35% |
=35% |
||
|
Hardness (HV) |
<105 |
<100 |
<90 |
<90 |
||
|
NB |
Size |
OD mm |
40S mm |
5S mm |
10S mm |
S 10 mm |
S 20 mm |
S 40 mm |
S 60 mm |
XS/80S mm |
S 80 mm |
S 100 mm |
S 120 mm |
S 140 mm |
S 160 mm |
XXS mm |
|
1/8” |
10.29 |
1.24 |
1.73 |
2.41 |
||||||||||||
|
1/4” |
13.72 |
1.65 |
2.24 |
3.02 |
||||||||||||
|
3/8” |
17.15 |
1.65 |
2.31 |
3.20 |
||||||||||||
|
15 |
1/2” |
21.34 |
2.77 |
1.65 |
2.11 |
2.77 |
3.73 |
3.73 |
4.78 |
7.47 |
||||||
|
20 |
3/4” |
26.67 |
2.87 |
1.65 |
2.11 |
2.87 |
3.91 |
3.91 |
5.56 |
7.82 |
||||||
|
25 |
1” |
33.40 |
3.38 |
1.65 |
2.77 |
3.38 |
4.55 |
4.55 |
6.35 |
9.09 |
||||||
|
32 |
1 1/4” |
42.16 |
3.56 |
1.65 |
2.77 |
3.56 |
4.85 |
4.85 |
6.35 |
9.70 |
||||||
|
40 |
1 1/2” |
48.26 |
3.68 |
1.65 |
2.77 |
3.68 |
5.08 |
5.08 |
7.14 |
10.15 |
||||||
|
50 |
2” |
60.33 |
3.91 |
1.65 |
2.77 |
3.91 |
5.54 |
5.54 |
9.74 |
11.07 |
||||||
|
65 |
2 1/2” |
73.03 |
5.16 |
2.11 |
3.05 |
5.16 |
7.01 |
7.01 |
9.53 |
14.02 |
||||||
|
80 |
3” |
88.90 |
5.49 |
2.11 |
3.05 |
5.49 |
7.62 |
7.62 |
11.13 |
15.24 |
||||||
|
90 |
3 1/2” |
101.60 |
5.74 |
2.11 |
3.05 |
5.74 |
8.08 |
8.08 |
||||||||
|
100 |
4” |
114.30 |
6.02 |
2.11 |
3.05 |
6.02 |
8.56 |
8.56 |
11.12 |
13.49 |
17.12 |
|||||
|
125 |
5” |
141.30 |
6.55 |
2.77 |
3.40 |
6.55 |
9.53 |
9.53 |
12.70 |
15.88 |
19.05 |
|||||
|
150 |
6” |
168.27 |
7.11 |
2.77 |
3.40 |
7.11 |
10.97 |
10.97 |
14.27 |
18.26 |
21.95 |
|||||
|
200 |
8” |
219.08 |
8.18 |
2.77 |
3.76 |
6.35 |
8.18 |
10.31 |
12.70 |
12.70 |
15.09 |
19.26 |
20.62 |
23.01 |
22.23 |
|
|
250 |
10” |
273.05 |
9.27 |
3.40 |
4.19 |
6.35 |
9.27 |
12.70 |
12.70 |
15.09 |
19.26 |
21.44 |
25.40 |
28.58 |
25.40 |
|
|
300 |
12” |
323.85 |
9.53 |
3.96 |
4.57 |
6.35 |
10.31 |
14.27 |
12.70 |
17.48 |
21.44 |
25.40 |
28.58 |
33.32 |
25.40 |
|
|
350 |
14” |
355.60 |
9.53 |
3.96 |
4.78 |
6.35 |
7.92 |
11.13 |
15.09 |
12.70 |
19.05 |
23.83 |
27.79 |
31.75 |
35.71 |
|
|
400 |
16” |
406.40 |
9.53 |
4.19 |
4.78 |
6.35 |
7.92 |
12.70 |
16.66 |
12.70 |
21.44 |
26.19 |
30.96 |
36.53 |
40.49 |
|
|
450 |
18” |
457.20 |
9.53 |
4.19 |
4.78 |
6.35 |
7.92 |
14.27 |
19.05 |
12.70 |
23.83 |
29.36 |
34.93 |
39.67 |
45.24 |
|
|
500 |
20” |
508.00 |
9.53 |
4.78 |
5.54 |
6.35 |
9.53 |
15.09 |
20.62 |
12.70 |
26.19 |
32.54 |
38.10 |
44.45 |
50.01 |
|
|
550 |
22” |
558.80 |
9.53 |
4.78 |
5.54 |
6.35 |
9.53 |
22.23 |
12.70 |
28.58 |
34.93 |
41.28 |
47.63 |
53.98 |
||
|
600 |
24” |
609.60 |
9.53 |
5.54 |
6.35 |
6.35 |
9.53 |
17.48 |
24.61 |
12.70 |
30.96 |
38.89 |
46.02 |
52.37 |
59.54 |
|
|
650 |
26” |
660.40 |
9.53 |
7.92 |
12.70 |
12.70 |
||||||||||
|
700 |
28” |
711.20 |
9.53 |
7.92 |
12.70 |
12.70 |
||||||||||
|
750 |
30” |
762.00 |
9.53 |
6.35 |
7.92 |
7.92 |
12.70 |
12.70 |
||||||||
|
800 |
32” |
812.80 |
9.53 |
7.92 |
12.70 |
17.48 |
12.70 |
|||||||||
|
850 |
34” |
863.60 |
9.53 |
7.92 |
12.70 |
17.48 |
12.70 |
|||||||||
|
900 |
36” |
914.40 |
9.53 |
7.92 |
12.70 |
19.05 |
12.70 |
|||||||||
Satin/Hairline,Mirror finish
