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Stainless Steel Instrumentation
Fractional / Metric Tubing
TS-04-S
2011
4 of 6
www.dklok.comTable 4. Tubing Material Grade and Chemical Requirements
Stainless Steel Tubing
Fully annealed austenitic Type 304 or 316 seamless tubing ASTM A269 or A213, or equivalent. Tubing to be free from
scratches, draw mark, dirt, durst and flat spots. Suitable for bending and flaring.
Table 5. Seamless Stainless Steel Fractional Tubing
Recommended hardness: 80 HRB (180 HV) or less.
Tube Wall Thickness,
in.
Tube
OD
in.
0.012 0.014 0.016 0.020 0.028 0.035 0.049 0.065 0.083 0.095 0.109 0.120 0.134 0.156 0.188
1/16
6800 8100 9400 12000
1/8
8500 10900
3/16
5400 7000 10200
1/4
4000 5100 7500 10200
Working Pressure in PSIG
5/16
4000 5800 8000
3/8
3300 4800 6500 8600
1/2
2400 3500 4700 6200
5/8
2900 4000 5200 6000
3/4
2400 3300 4200 4900 5800 6400
7/8
2000 2800 3600 4200 4800 5400 6100
1
2400 3100 3600 4200 4700 5300 6200
1 1/4
2400 2800 3300 3600 4100 4900
1 1/2
2300 2700 3000 3400 4000 4900
2
2000 2200 2500 2900 3600
ASTM Standards
ASTM
A269
A213 (a) / A249
UNS
S31600
S31603
S31600
S31603
Material
Grade
Grade
TP316
TP316L
TP316
TP316L
Chromium
16.0 to 18.0
Nickel
10.0 to 14.0
11.0 to 14.0 10.0 to 15.0
Molybdenum
2.00 to 3.00
Manganese
2.00 max
Silicon
1.00
0.75 max
0.75 max
(b)
Carbon
0.08 max
0.035 max
(c)
0.08 max
0.035 max
(c)
Phosphorus
0.045 max
0.040 max
Chemical
%
Sulfur
0.030 max
(a) Nominal wall thickness, not
minimum wall thickness.
(b) For seamless TP316L tube, the
silicon maximum shall be
1.00%.
(c) For smaller diameter or thin
walls, or both, where many
drawing passes are required, a
carbon maximum of 0.040 % is
necessary in grade TP316L.
This is applicable tubing size
less than 1/2 in. OD and less
than 0.049 in. (1.2 mm) in WT.