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ROUND 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






                                                                           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


Round Tube Size List


 


 


 

 

 

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