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SPECIAL-SHAPE TUBES

StandardASTM A554- Standard Specification for Welded Stainless Steel Mechanical Tubing 

EN10296-2- Welded circular steel tubes for mechanical and general engineering purposes — Technical delivery conditions —Part 2: Stainless steel

Grades: 201,202,304,304L,316L,409,430,439





 


Chemical Requirements

Grade

Composition, %

C

Mn

P

S

Si

Ni

Cr

Mo

Max


Max

Max

Max




Austenitic

201

0.15

8.0-12.0

0.06

0.03

1.00

1.0-2.5

13.0-15.0


202

0.15

7.5-10.0

0.06

0.03

1.00

3.0-5.0

15.0-17.0


301

0.15

2.0max

0.04

0.03

1.00

5.0-7.0

15.0-17.0


304

0.08

2.0max

0.04

0.03

1.00

8.0-11.0

18.0-20.0


304L

0.035

2.0max

0.04

0.03

1.00

8.0-13.0

18.0-20.0


316

0.08

2.0max

0.04

0.03

1.00

10.0-14.0

16.0-18.0

2.0-3.0

316L

0.035

2.0max

0.04

0.03

1.00

10.0-15.0

16.0-18.0

2.0-3.0

321

0.08

2.0max

0.04

0.03

1.00

9.0-13.0

17.0-20.0


Ferritic

430

0.12

1.00

0.04

0.03

1

0.5max

16.0-18.0




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 %

430 60 414 35 241 20 190 90
430Ti 60 414 30 207 20 190 90
304L&316L 70 483 25 172 35 192 90
All other austenitic
75 517 30 207 35 192 90

Tolerances

ASTM A554 Wall Thickness/Outside Dimention Tolerances
Wall Thickness Tolerances
± 10% of specified wall thickness
 Round Tubing Outside Dimention Tolerances
OD Size, in.(mm)
Wall Thickness
OD,±
mm
mm
mm
Under ½ (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
Square & Rectangular Outside Dimention Tolerances
Largest Specified OD Across Flats, in.(mm)
Wall Thickness
across flats, Convexity or Concavity, ±
mm mm
mm
To 1 ¼ (31.8), incl
all
0.38
Over 1 ¼ to 2 ½ (31.8-63.5), incl
all
0.51
Over 2 ½ to 5 ½ (63.5-139.7), incl
all
0.76
Over 5 ½  to 8 (139.7-203.2), incl
all
1.52
Square & Rectangular Outside Dimention Tolerances
Wall Thickness, in.(mm)
Radii of Corners, max
mm mm
Over 0.020-0.049 (0.51-1.24), incl
2.4
Over 0.049-0.065 (1.24-1.65), incl
3.2
Over 0.065-0.083 (1.65-2.11), incl
3.6
Over 0.083-0.095 (2.11-2.42), incl
4.8
Over 0.095-0.109 (2.42-2.77), incl
5.2
Over 0.109-0.134 (2.77-3.40), incl
5.6
Over 0.134-0.156 (3.40-3.96), incl
6.4
Over 0.156-0.200 (3.96-5.08), incl
9.5
Over 0.200-0.250 (5.08-6.35), incl
12.7
Over 0.250-0.375 (6.35-9.53), incl
19.1
Square & Rectangular Twist Tolerances
Largest Size, in.(mm)
Twist in 3 ft (1m), max
mm
mm
Under  ½ (12.7)
1.4
 ½ to 1 ½ (12.7-38.1), incl
2.1
Over 1 ½ -2 ½ (38.1-63.5), incl
2.6
Over 2 ½ - 4 (63.5-101.6), incl
3.5
Over 4 - 6 (101.6-152.4), incl
6.9
Over 6 (152.4)
10.4

Special-shape Tube Size List

Drawing
OD Drawing
OD
a*b*c a*b*c

19*25
isosceles 5*12*12
15*30
isosceles 100*40*60
18*33 isosceles 40*20*20
20*30 28*30*17.5
20*34.3 50*60*80
21*61 30*125*60
23*38 30*130*50
24.9*40 30*120*60
28*57 30*150*50
30*60
40*40
30*70 61*61
31*62
90*55*51
32*64 86*59*51
35*55 73*46
34*80
60*42
35*80 63*43
40*60 65*47
40*80
63*43
40*110 72*52
42*75 107*54
46*100
30*30*R14
50*100 38*38*R38
50*120 80*80*R50
50*150
54*50*40
57*93
60*90
60*115
60*120
60*150
78*145
150*25*35
80*142
90*180
95*180
100*150
80*25
100*180
110*200
153*177

6*12
14*21

13*25 13*13*13
15*30
15*35
14*36
15*36 60*60*60
16*34
15*35
18*33
20*40
20*90
31*28.6*55
30*60
40*80
15*117
51*151
60*100
154*251


22.3*17.5
100*40*30
60*25 90*25.4*90
70*40
120*40 25*22*25


120*60*80




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