STAINLESS ASTM SPECIFICATIONS
A511 Seamless Stainless Steel Mechanical Tube
Tolerances (Cold Finished Round Tube)
Size
Inches |
ODB
Over/ Under, In. |
WallCD Over/
Under % |
Cut
Length Inches |
OvalityB Double Outside Diameter Tolerlance
When Wall Is: |
Under 1/2
|
0.005
|
15
|
+1/8 –0
|
less than 0.015
|
1/2 to 1-1/2 excl.
|
0.005
|
10
|
+1/8 –0
|
less than 0.065
|
1-1/2 to 3-1/2 excl.
|
0.010
|
10
|
+3/16 –0
|
less than 0.095
|
3-1/2 to 5-1/2 excl.
|
0.015
|
10
|
+3/16 –0
|
less than 0.150
|
5-1/2 to 8 excl.
|
0.030
|
10
|
+3/16 –0
|
less than 0.240
|
8 to 8-5/8 excl.
|
0.045
|
10
|
+3/16 –0
|
less than 0.300
|
A Tolerances of tubes produced by the rod or bar mandrel process and which have an inside diameter under 1/2 inch (or an inside diameter under 5/8 inch when the wall thickness is more than 20 percent of the outside diameter) are as shown in this table, except that wall thickness tolerances are 10 percent over and under the specified wall thickness.
B For ovality values, the tolerance for average outside diameter at any one cross section does not exceed the outside diameter tolerance value for the applicable outside diameter.
C Many tubes with wall thicknesses more than 25 percent of outside diameter or with wall thicknesses over 1-1/4 inch or weighing more than 90 lbs per foot are difficult to draw over a mandrel. Therefore, the wall thickness can vary 12-1/2 percent over and under that specified. Also see Footnote B.
D For those tubes with inside diameter under 1/2 inch (or under 5/8 inch when the wall thickness is more than 20 percent of the outside diameter) which are not commonly drawn over a mandrel, Footnote A is not applicable. Therefore, the wall thickness can vary 15 percent over and under that specified, and the inside diameter is governed by both the outside diameter and wall thickness tolerances.
E These tolerances apply to cut lengths up to and including 24 feet. For lengths over 24 feet, an additional over tolerance of 1/8 inch for each 10 feet or fraction thereof shall be permissible, up to a maximum tolerance of 1/2 inch.
ASTM A511
Tolerances (Hot Finished Round Table)
|
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Specified
Size, Outside Diameter, In. |
Ratio of
Wall Thickness to Outside Diameter |
Tolerances (Hot Finished Round Table)
|
Permissible
Variations in Cut Length (in.A) |
||||||||||
Outside
Diameter, In. |
Wall Thickness, %
|
||||||||||||
0.109, In.
and under |
0.109 to 0.172
(in., incl.) |
Over 0.172
to 0.203 (in., incl.) |
Over
0.203, In. |
||||||||||
Over
|
Under
|
Over
|
Under
|
Over
|
Under
|
Over
|
Under
|
Over
|
Under
|
||||
Under 3
|
all wall
thicknesses |
0.023
|
0.023
|
16.5
|
16.5
|
15
|
15
|
14
|
14
|
12.5
|
12.5
|
3/16
|
0
|
3 to 5-1/2
excl. |
all wall
thicknesses |
0.031
|
0.031
|
16.5
|
16.5
|
15
|
15
|
14
|
14
|
12.5
|
12.5
|
3/16
|
0
|
5-1/2 to 8
excl. |
all wall
thicknesses |
0.047
|
0.047
|
—
|
—
|
—
|
—
|
14
|
14
|
12.5
|
12.5
|
3/16
|
0
|
8 to 10-3/4
excl |
5% and over
|
0.047
|
0.047
|
—
|
—
|
—
|
—
|
—
|
—
|
12.5
|
12.5
|
3/16
|
0
|
10-3/4 to
12-3/4 incl. |
under 5%
|
0.063
|
0.063
|
—
|
—
|
—
|
—
|
—
|
—
|
12.5
|
12.5
|
3/16
|
0
|
A These tolerances apply to cut lengths up to and including 24 feet. For lengths over 24 feet, an additional over tolerance of 1/8 inch for each 10 feet or fraction thereof shall be permissible up to a maximum tolerance of 1/2 inch.
STAINLESS STEEL ORNAMENTAL TUBING
ASTM A554
Technical Data
Tolerances — Diameter, Wall— Round Tubing
|
||
OD Size
Inches |
Wall Thickness
|
OD
± Inches |
Under 1/2
|
0.020 to 0.049
|
0.004
|
1/2 to 1
|
0.020 to0.065
|
0.005
|
1/2 to 1
|
over 0.065 to 0.134
|
0.010
|
Over 1 to 1-1/2
|
0.025 to 0.065
|
0.008
|
Over 1 to 1-1/2
|
over 0.065 to 0.134
|
0.010
|
Over 1-1/2 to 2
|
0.025 to 0.049
|
0.010
|
Over 1-1/2 to 2
|
over 0.049 to 0.083
|
0.011
|
Over 1-1/2 to 2
|
over 0.083 to 0.149
|
0.012
|
Over 2 to 2-1/2
|
0.032 to 0.065
|
0.012
|
Over 2 to 2-1/2
|
over 0.065 to 0.109
|
0.013
|
Over 2 to 2-1/2
|
over 0.109 to 0.165
|
0.014
|
Over 2-1/2 to 3-1/2
|
0.032 to 0.165
|
0.014
|
Over 2-1/2 to 3-1/2
|
over 0.165
|
0.020
|
Over 3-1/2 to 5
|
0.035 to 0.165
|
0.020
|
Over 3-1/2 to 5
|
over 0.165
|
0.025
|
Over 5 to 7-1/2
|
0.049 to 0.250
|
0.025
|
Over 5 to 7-1/2
|
over 0.250
|
0.030
|
Over 7-1/2 to 16
|
all
|
0.00125 In/In of Circumference
|
*Wall tolerance ± 10% of specified wall thickness.
Note 1: Ovality is the difference between maximum and minimum outside diameters measured at any one cross section. There is no additional tolerance for ovality on tubes having a specified wall thickness of more than 3% of the outside diameter.
Note 2: For sizes up to and including 5-in. outside diameter, an ovality tolerance of twice the tabular outside diameter tolerance spread shown is applied one half plus and one half minus to tubes having a specified wall thickness of 3% or less of the specified outside diameter. The average of maximum and minimum outside diameter readings should fall within the outside diameter tolerances as shown in this table.
Note 3: For sized over 5-in. to and including 16-in. outside diameter, when the specified wall thickness is 3% or less of the outside diameter, the ovality shall not exceed 1.5% of the specified outside diameter.
TOLERANCES — OUTSIDE DIAMETER SQUARE AND RECTANGULAR TUBING
Largest Specified
Outside Dimension, Inches |
Wall Thickness,
Inches |
OD
± Inches |
To 1-1/4
|
all
|
0.015
|
Over 1-1/4 to 2
|
all
|
0.020
|
Over 2-1/2 to 5
|
all
|
0.030
|
Over 5-1/2
|
all
|
0.060
|
MAXIMUM RADII OF CORNERS
Wall Thickness, Inches
|
Radii of Corners,
max., in. |
Over 0.020 to 0.049, incl
|
3/32
|
Over 0.049 to 0.065, incl
|
1/8
|
Over 0.065 to 0.083, incl
|
9.64
|
Over 0.083 to 0.095, incl
|
3/16
|
Over 0.095 to 0.109, incl
|
13/34
|
Over 0.109 to 0.134, incl
|
7/32
|
Over 0.134 to 0.156, incl
|
1/4
|
Over 0.156 to 0.200, incl
|
3/8
|
Over 0.200 to 0.250, incl
|
1/2
|
Over 0.250 to 0.375, incl
|
3/4
|
Note: For square or rectangular structural tubing with heavier walls, the radius of any outside corner of the section shall not exceed three times the specified wall thickness.
TWIST TOLERANCES
Largest Size, Inches
|
Twist In 3 ft., max, Inches
|
Under 1/2
|
0.050
|
1/2 to 1-1/2 , incl.
|
0.075
|
Over 1-1/2 to 2-1/2, incl.
|
0.095
|
Over 2-1/2 to 4, incl.
|
0.125
|
Over 4 to 6, incl.
|
0.250
|
Over 6
|
0.375
|
±B = C X 0.006 where:
B = tolerance for out-of-square, and
C = length of longest side.
The straightness tolerance is 0.075 in. in 3 ft.
using a 3-ft. straightedge and feeler gauge.
AS-WELDED SPECIFICATIONS ASTM A778
TOLERANCES, INCHES
Nominal Pipe
Size (Inches) |
OD
|
Wall
|
Cut
Length |
|
Over
|
Under
|
|||
1/8 to 1-1/2
|
1/64
|
1/32
|
+4.5% to
-12.5% |
+1/4
-0 |
Over 1-1/2 to 4
|
1/32
|
1/32
|
||
Over 4 to 8
|
1/16
|
1/32
|
||
Over 8 to 18
|
3/32
|
1/32
|
AS-WELDED SPECIFICATIONS ASTM A778
TENSILE REQUIREMENTS
Grade
|
UNS
Designation |
Tensile
Strength, min ksi (MPa) |
Yield
Strength min, ksi (MPa) |
Elongation in 2
in. (50 mm) min, % |
TP304L
|
S30403
|
70 (485)
|
25 (170)
|
40
|
TP316L
|
S31603
|
70 (485)
|
25 (170)
|
40
|
TP317L
|
S31703
|
75 (515)
|
30 (205)
|
35
|
TP321
|
S32100
|
75 (515)
|
30 (205)
|
40
|
TP347
|
S34700
|
75 (515)
|
30 (205)
|
40
|