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)
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

Squareness of Sides
±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