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ASTM A554

ASTM A554

ASTM A554 is a critical standard issued by the American Society for Testing and Materials, specifying the criteria for welded stainless steel mechanical tubing used in both structural and aesthetic applications. It encompasses tubes made from austenitic and ferritic stainless steel grades, outlining requirements for dimensions, shapes, surface finishes, and the integrity of the weld seam. The standard ensures that the weld seam is as robust as the base metal and maintains uniform metallography, thereby safeguarding the tube's performance and durability. This standard is pivotal for manufacturers, architects, and engineers, ensuring that products conform to stringent quality, reliability, and aesthetic standards. MW ASTM A554 tubes range OD 9-325mm/10x10-200x200mm, THK 0.6-6mm.

Available Grades and Chemical Requirements

Available Grades and Chemical Requirements

Grade
Composition, %
C
Mn
P
S
Si
Ni
Cr
Mo
max
max
max
max
Austenitic
201
0.150
8.0-12.0
0.06
0.030
1.00
1.0-2.5
13.0-15.0
304
0.080
2.0 max
0.045
0.030
1.00
8.0-11.0
18.0-20.0
304L
0.035
2.0 max
0.045
0.030
1.00
8.0-13.0
18.0-20.0
316L
0.035
2.0 max
0.045
0.030
1.00
10.0-15.0
16.0-18.0
2.0-3.0
321
0.080
2.0 max
0.040
0.030
1.00
9.0-13.0
17.0-20.0
Ferritic
409L
0.030
1.0 max
0.040
0.020
1.00
0.5 max
10.5-11.7
430
0.120
1.00
0.040
0.030
1.00
0.5 max
16.0-18.0
439
0.030
1.00
0.040
0.030
1.00
0.5 max
17.0-19.0
Austenitic-Ferritic
2205
0.030
2.0 max
0.030
0.020
1.00
4.5-6.5
22.0-23.0
3.0-3.5
2507
0.030
1.2 max
0.035
0.020
0.80
6.0-8.0
24.0-26.0
3.0-5.0

ASTM A554 Mechanical Properties

Mechanical Properties

Grade
Tensile Requirements
Hardness Requirements
Tensile Strength, min
Yield Strength, min
Elongation in 2 in. or (50mm), min
Brinell, max
Rockwell, max
ksi
Mpa
ksi
Mpa
%
304L & 316L
70
483
25
172
35
192
90
All other austenitic
75
517
30
207
35
192
90
409L
55
379
30
207
20
190
90
430
60
414
35
241
20
190
90
All other ferritic
60
414
35
241
20
190
90

Tolerances

Tolerances

ASTM A554 Wall Thickness/Outside Dimention Tolerances
Wall Thickness Tolerances
±10% of specified wall thickness
Round Tubing Outside Dimention Tolerances
OD Size
Wall Thickness
OD,±
mm
mm
mm
Under 12.7
0.51 - 1.24
0.10
12.7 - 25.4
0.51 - 1.65
0.13
12.7 - 25.4
Over 1.65 - 3.40
0.25
Over 25.4 - 38.1,incl
0.64 - 1.65
0.20
Over 25.4 - 38.1,incl
Over 1.65 - 3.40
0.25
Over 38.1 - 50.8,incl
0.64 - 1.24
0.25
Over 38.1 - 50.8,incl
Over 1.24 - 2.11
0.28
Over 38.1 - 50.8,incl
Over 2.11 - 3.78
0.30
Over 50.8 - 63.5,incl
0.81 - 1.65
0.30
Over 50.8 - 63.5,incl
Over 1.65 - 2.77
0.33
Over 50.8 - 63.5,incl
Over 2.77 - 4.19
0.36
Over 63.5 - 88.9,incl
0.81 - 4.19
0.36
Over 63.5 - 88.9,incl
Over 4.19
0.51
Over 88.9 - 127.0,incl
0.89 - 4.19
0.51
Over 88.9 - 127.0,incl
Over 4.19
0.64
Over 127.0 - 190.5,incl
1.24 - 6.35
0.64
Over 127.0 - 190.5,incl
Over 6.35
0.76
Over 190.5 - 406.4,incl
all
0.00125 in./in.or mm/mm of cicumference
Square & Rectangular Outside Dimention Tolerances
Largest Specified OD Across Flats
Wall Thickness
Across fiats, Convexity or Concavity,±
mm
mm
mm
To 31.8,incl
0.38
Over 31.8 - 63.5,incl
0.51
Over 63.5 - 139.7,incl
0.76
Over 139.7 - 203.2,incl
1.52
Square & Rectangular Maximum Radii of Corners Tolerances
Wall Thickness
Radii of Corners, max
mm
mm
Over 0.51 - 1.24,incl
2.4
Over 1.24 - 1.65,incl
3.2
Over 1.65 - 2.11,incl
3.6
Over 2.11 - 2.42,incl
4.8
Over 2.42 - 2.77,incl
5.2
Over 2.77 - 3.40,incl
5.6
Over 3.40 - 3.96,incl
6.4
Over 3.96 - 5.08,incl
9.5
Over 5.08 - 6.35,incl
12.7
Over 6.35 - 9.53,incl
19.1

Round Tube Size List

Round Tube Size List

OD(mm) / WT(mm)
0.60
0.70
0.80
0.90
1.00
1.20
1.50
2.00
2.50
3.00
4.00
5.00
6.00
6
7
8
9
9.5
10
12(12.7)
13
14
15
16(15.9)
18
19
20
21.3
22.22
23
25(25.4)
26.9
28.6
30
32(31.8)
33.7
35
38.1
40
41.3
42.4
44.5
OD(mm) / WT(mm)
0.60
0.70
0.80
0.90
1.00
1.20
1.50
2.00
2.50
3.00
4.00
5.00
6.00
45
48.3
50.8
52
53
54
57
60.3
63.5
65
70
72
73
76.2
80
84
85
88.9
100
101.6
108
114.3
127
129
133
139.7
152.4
154
159
OD(mm) / WT(mm)
0.60
0.70
0.80
0.90
1.00
1.20
1.50
2.00
2.50
3.00
4.00
5.00
6.00
168.3
180
203.2
204
219
273
323.5
325

Square/Rectangular Tube Size List

Square/Rectangular Tube Size List

OD(mm) / WT(mm)
0.60
0.70
0.80
0.90
1.00
1.20
1.50
2.00
2.50
3.00
4.00
5.00
6.00
10x10
12x12(12.7x12.7)
15x15
16x16(15.9x15.9)
19x19(19.05x19.05)
v
20x10
20x20
23x11
25x13(25.4x12.7)
25x25(25.4x25.4)