ISO 10799-2:2011

INTERNATIONAL ISO
STANDARD 10799-2
First edition
2011-09-15
Cold-formed welded structural hollow
sections of non-alloy and fine grain
steels —
Part 2:
Dimensions and sectional properties
Profils creux de construction formés à froid, soudés, en acier non allié
ou à grains fins —
Partie 2: Dimensions et caractéristiques du profil

Reference number
©
ISO 2011
©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
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Published in Switzerland
ii © ISO 2011 – All rights reserved

Contents Page
Foreword . iv
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Symbols . 1
5  Information to be supplied by the purchaser . 2
6  Tolerances . 2
7  Measurement of size and shape . 4
7.1  General . 4
7.2  Outside dimension . 4
7.3  Thickness . 5
7.4  Out-of-roundness . 5
7.5  Concavity and convexity . 5
7.6  Squareness of sides . 6
7.7  External corner profile . 6
7.8  Twist . 7
7.9  Straightness . 8
8  Dimensions and sectional properties . 8
Annex A (normative) Formulae for calculation of sectional properties . 25

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 10799-2 was prepared by Technical Committee ISO/TC 5, Ferrous metal pipes and metallic fittings,
Subcommittee SC 1, Steel tubes.
This first edition of ISO 10799-2 cancels and replaces ISO 4019:2001, of which it constitutes a minor revision.
In particular, better grouping of several documents by subject area and minor editorial improvements have
been carried out.
ISO 10799 consists of the following parts, under the general title Cold-formed welded structural hollow
sections of non-alloy and fine grain steels:
 Part 1: Technical delivery conditions
 Part 2: Dimensions and sectional properties

iv © ISO 2011 – All rights reserved

INTERNATIONAL STANDARD ISO 10799-2:2011(E)

Cold-formed welded structural hollow sections of non-alloy and
fine grain steels —
Part 2:
Dimensions and sectional properties
1 Scope
This part of ISO 10799 specifies the tolerances for cold-formed welded circular, square and rectangular
structural hollow sections, and gives the dimensions and sectional properties for a range of standard sizes.
NOTE For the technical delivery requirements, see ISO 10799-1.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 10799-1, Cold-formed welded structural hollow sections of non-alloy and fine grain steels — Part 1:
Technical delivery conditions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10799-1 apply.
4 Symbols
For the purposes of this document, the symbols given in Table 1 apply.
Table 1 — Symbols
Symbol Unit Definition
A cm Cross-sectional area
A m /m Surface area per metre length
s
Nominal length of side of a square hollow section
B mm
Nominal length of the shorter side of a rectangular hollow section
C ; C mm Length of external corner profile of a square or rectangular hollow section
1 2
C cm Torsional modulus constant
t
D mm Nominal outside diameter of a circular hollow section

Table 1 (continued)
Symbol Unit Definition
Maximum and minimum outside diameter of a circular hollow section, measured in the same
D ; D mm
max min
plane
e mm Deviation from straightness
H mm Nominal length of the longer side of a rectangular hollow section
I cm Second moment of area
I cm Torsional-inertia constant (polar moment of inertia for circular hollow sections only)
t
i cm Radius of gyration
L mm Length
M kg/m Mass per unit length
O % Out-of-roundness
R mm External corner radius of a square or rectangular hollow section
T mm Nominal thickness
V mm Total twist
V mm Twist measured at one end of a section
W cm Elastic section modulus
el
W cm Plastic section modulus
pl
x mm Concavity of a side of a square or rectangular hollow section
x mm Convexity of a side of a square or rectangular hollow section
XX — Axis of cross-section: major axis of a rectangular hollow section
YY — Axis of cross-section: minor axis of a rectangular hollow section
 Degrees Angle between adjacent sides of a square or rectangular hollow section

5 Information to be supplied by the purchaser
The following mandatory information taken from this part of ISO 10799 shall be supplied by the purchaser at
the time of enquiry and ordering:
a) the type of length, and the length or the length range (see Table 4);
b) the dimensions (see Clause 8).
NOTE This information is included in the list of information to be supplied by the purchaser contained in 5.1 of
ISO 10799-1:—.
6 Tolerances
Tolerances on the dimensions and mass of cold-formed hollow sections shall not exceed the values given in
Table 2 for shape and mass, Table 3 for external corner profiles, Table 4 for length and, in the case of
submerged-arc-welded hollow sections, Table 5 for the height of the internal and external weld beads.
The internal corners of square and rectangular hollow sections shall be rounded.
NOTE The internal corner profile is not specified.
2 © ISO 2011 – All rights reserved

Table 2 — Tolerances
Characteristic Circular hollow sections Square and rectangular hollow sections
Side length
Tolerance
mm
Outside dimensions (D, B and  1 %, with a minimum of  0,5 mm and a H, B  100  1 %, with a
H) maximum of  10 mm. minimum of
 0,5 mm
100  H, B  200  0,8 %
H, B > 200  0,6 %
Thickness, T For D  406,4 mm T  5 mm:  10 %
T  5 mm:  10 %
T  5 mm:  0,50 mm T  5 mm:  0,50 mm
For D  406,4 mm
 10 % with a maximum of  2 mm
Out-of-roundness, O 2 % for hollow sections having a diameter
—
a
to thickness ratio not exceeding 100
b
Concavity/convexity — Max. 0,8 %, with a minimum of 0,5 mm
Squareness of sides — 90°  1°
External corner profile — See Table 3
Twist, V — 2 mm plus 0,5 mm/m length
Straightness 0,2 % of total length 0,15 % of total length
Mass, M, per unit length  6 % on individual lengths
a
Where the diameter to thickness ratio exceeds 100, the tolerance on out-of-roundness shall be agreed.
b
The tolerance on convexity and concavity is dependent of the tolerance on outside dimensions.

Table 3 — External corner profile
Thickness External corner profile

a
T C , C , or R
1 2
mm mm
T  6 1,6 T to 2,4 T
6  T  10 2,0 T to 3,0 T
T  10 2,4 T to 3,6 T
a
The sides need not be tangential to the corner arcs.

a
Table 4 — Tolerances on length
Range
Type of length Tolerance
mm
Random length 4 000 to 16 000 with a range of 10 % of sections supplied may be below
2 000 per order item. the minimum for the ordered range, but
not less than 75 % of the minimum of
the range.
50 mm
Approximate length  4 000
Exact length 5 mm
 6 000
15 mm
 6 000 to  10 000
5 mm 1 mm/m
 10 000
a
The purchaser shall indicate in the enquiry and order the type of length required and the length or length range as
appropriate.
Table 5 — Tolerance on height of internal and external weld
bead for submerged-arc-welded hollow sections
Thickness Maximum weld bead height
T
mm mm
 14,2 3,5
 14,2 4,8
7 Measurement of size and shape
7.1 General
All external dimensions including out-of-roundness shall be measured at a distance from the end of the hollow
section of not less than D for circular sections, B for square sections or H for rectangular sections, with a
minimum of 100 mm.
7.2 Outside dimension
For circular hollow sections, the diameter, D, shall be measured. A calliper gauge, circumference tape or other
suitable device may be used at the discretion of the manufacturer.
Dimensions B and H shall be measured at a position within 5 mm from the start of the external corner profile
as shown in Figure 1.
4 © ISO 2011 – All rights reserved

Dimensions in millimetres
a
This dimension is a maximum when measuring B or H and a minimum when measuring T.
Figure 1 — Limiting cross-sectional positions for measuring the dimensions B, H and T for square or
rectangular hollow sections
7.3 Thickness
The thickness, T, shall be measured at a position of not less than 2T from the weld.
The limiting cross-sectional positions for measuring the thickness of square and rectangular hollow sections
are shown in Figure 1.
NOTE Thickness is normally measured within a distance of half the outside diameter or half the longer side length
from the end of the section.
7.4 Out-of-roundness
The out-of-roundness, O, of a circular hollow section shall be calculated, as a percentage, from the following
equation:
DD
max min
O100
D
7.5 Concavity and convexity
The concavity, x , or the convexity, x , of the sides of a square or rectangular hollow section shall be
1 2
measured as shown in Figure 2.
The percentage concavity or convexity shall be calculated using the following:
xx xx
12 12
100; 100;100; 100
BB H H
where B and H are the lengths of the sides containing the concavity, x , or the convexity, x
1 2.
Figure 2 — Measurement of concavity/convexity of square or rectangular hollow sections
7.6 Squareness of sides
The deviation from squareness of the sides of a square or rectangular hollow section is defined as the
difference between 90° and  as shown in Figure 3.

Deviation from squareness = 90°  
Figure 3 — Squareness of sides of square or rectangular hollow sections
7.7 External corner profile
The external corner profile of a square or rectangular hollow section shall be measured in accordance with a)
or b), at the discretion of the manufacturer.
a) Measure the external corner radius, R. Use a radius gauge or other suitable device.
b) Measure the length of the external corner profile (C and C in Figure 4).
1 2
6 © ISO 2011 – All rights reserved

Figure 4 — External corner profile of square or rectangular hollow sections
7.8 Twist
The total twist, V, in a square or rectangular hollow section shall be determined in accordance with a) or b), at
the discretion of the manufacturer.
a) Place the hollow section on a horizontal surface with one side at one end pressed flat against the surface.
At the opposite end of the hollow section, determine the difference, V, in the height of the two lower
corners from a horizontal surface (see Figure 5).
b) Measure V with a spirit level and micrometer (screw) gauge or other suitable device. The reference length
of the spirit level shall be the distance between the intersection of the flat sides and the external corner
profile (see Figure 6). V is the difference between the values, V (see Figure 6), measured at each end of
the section.
Figure 5 — Total twist of square or rectangular hollow sections
Key
1 spirit level
2 micrometer gauge
a
H for rectangular sections, B for square sections.
Figure 6 — Measurement of twist
7.9 Straightness
The deviation from straightness, e, of the total length of a hollow section shall be measured at the point of
maximum departure of the section from a straight line connecting its two ends as shown in Figure 7. The
percentage deviation from straightness shall be calculated using the following:
e
100 %
L
Figure 7 — Measurement of deviation from straightness
8 Dimensions and sectional properties
The nominal section dimensions and sectional properties for a range of cold-formed, structural hollow section
sizes are given in Table 6 for circular sections (see Figure 8), Table 7 for square sections and Table 8 for
rectangular sections. The sectional properties were calculated from the formulae given in Annex A. Other
sizes and thicknesses may be available.
8 © ISO 2011 – All rights reserved

NOTE See Table 6.
Figure 8 — Circular hollow section
Table 6 — Nominal dimensions and sectional properties of circular hollow sections
Surface Nominal
Mass per Cross- Second Radius Elastic Plastic Torsional Torsional
Outside area per length
Thickness unit sectional moment of section section inertia modulus
Diameter metre per
length area of area gyration modulus modulus constant constant
length tonne
D T M A I i W W I C A
el pl t t s
2 4 3 3 4 3 2
mm mm kg/m cm cm cm cm cm cm cm m/m m
21,3 2,0 0,95 1,21 0,571 0,686 0,536 0,748 1,14 1,07 0,066 9 1 050
21,3 2,5 1,16 1,48 0,664 0,671 0,623 0,889 1,33 1,25 0,066 9 863
21,3 3,0 1,35 1,72 0,741 0,656 0,696 1,01 1,48 1,39 0,066 9 739
26,9 2,0 1,23 1,56 1,22 0,883 0,907 1,24 2,44 1,81 0,084 5 814
26,9 2,5 1,50 1,92 1,44 0,867 1,07 1,49 2,88 2,14 0,084 5 665
26,9 3,0 1,77 2,25 1,63 0,852 1,21 1,72 3,27 2,43 0,084 5 566
33,7 2,0 1,56 1,99 2,51 1,12 1,49 2,01 5,02 2,98 0,106 640
33,7 2,5 1,92 2,45 3,00 1,11 1,78 2,44 6,00 3,56 0,106 520
33,7 3,0 2,27 2,89 3,44 1,09 2,04 2,84 6,88 4,08 0,106 440
42,4 2,0 1,99 2,54 5,19 1,43 2,45 3,27 10,4 4,90 0,133 502
42,4 2,5 2,46 3,13 6,26 1,41 2,95 3,99 12,5 5,91 0,133 407
42,4 3,0 2,91 3,71 7,25 1,40 3,42 4,67 14,5 6,84 0,133 343
42,4 4,0 3,79 4,83 8,99 1,36 4,24 5,92 18,0 8,48 0,133 264
48,3 2,0 2,28 2,91 7,81 1,64 3,23 4,29 15,6 6,47 0,152 438
48,3 2,5 2,82 3,60 9,46 1,62 3,92 5,25 18,9 7,83 0,152 354
48,3 3,0 3,35 4,27 11,0 1,61 4,55 6,17 22,0 9,11 0,152 298

Table 6 (continued)
Surface Nominal
Mass per Cross- Second Radius Elastic Plastic Torsional Torsional
Outside area per length
Thickness unit sectional moment of section section inertia modulus
Diameter metre per
length area of area gyration modulus modulus constant constant
length tonne
D T M A I i W W I C A
el pl t t s
2 4 3 3 4 3 2
mm mm kg/m cm cm cm cm cm cm cm m/m m
48,3 4,0 4,37 5,57 13,8 1,57 5,70 7,87 27,5 11,4 0,152 229
48,3 5,0 5,34 6,80 16,2 1,54 6,69 9,42 32,3 13,4 0,152 187
60,3 2,0 2,88 3,66 15,6 2,06 5,17 6,80 31,2 10,3 0,189 348
60,3 2,5 3,56 4,54 19,0 2,05 6,30 8,36 38,0 12,6 0,189 281
60,3 3,0 4,24 5,40 22,2 2,03 7,37 9,86 44,4 14,7 0,189 236
60,3 4,0 5,55 7,07 28,2 2,00 9,34 12,7 56,3 18,7 0,189 180
60,3 5,0 6,82 8,69 33,5 1,96 11,1 15,3 67,0 22,2 0,189 147
76,1 2,0 3,65 4,66 32,0 2,62 8,40 11,0 64,0 16,8 0,239 274
76,1 2,5 4,54 5,78 39,2 2,60 10,3 13,5 78,4 20,6 0,239 220
76,1 3,0 5,41 6,89 46,1 2,59 12,1 16,0 92,2 24,2 0,239 185
76,1 4,0 7,11 9,06 59,1 2,55 15,5 20,8 118 31,0 0,239 141
76,1 5,0 8,77 11,2 70,9 2,52 18,6 25,3 142 37,3 0,239 114
76,1 6,0 10,4 13,2 81,8 2,49 21,5 29,6 164 43,0 0,239 96,4
76,1 6,3 10,8 13,8 84,8 2,48 22,3 30,8 170 44,6 0,239 92,2
88,9 2,0 4,29 5,46 51,6 3,07 11,6 15,1 103 23,2 0,279 233
88,9 2,5 5,33 6,79 63,4 3,06 14,3 18,7 127 28,5 0,279 188
88,9 3,0 6,36 8,10 74,8 3,04 16,8 22,1 150 33,6 0,279 157
88,9 4,0 8,38 10,7 96,3 3,00 21,7 28,9 193 43,3 0,279 119
88,9 5,0 10,3 13,2 116 2,97 26,2 35,2 233 52,4 0,279 96,7
88,9 6,0 12,3 15,6 135 2,94 30,4 41,3 270 60,7 0,279 81,5
88,9 6,3 12,8 16,3 140 2,93 31,5 43,1 280 63,1 0,279 77,9
101,6 2,0 4,91 6,26 77,6 3,52 15,3 19,8 155 30,6 0,319 204
101,6 2,5 6,11 7,78 95,6 3,50 18,8 24,6 191 37,6 0,319 164
101,6 3,0 7,29 9,29 113 3,49 22,3 29,2 226 44,5 0,319 137
101,6 4,0 9,63 12,3 146 3,45 28,8 38,1 293 57,6 0,319 104
101,6 5,0 11,9 15,2 177 3,42 34,9 46,7 355 69,9 0,319 84,0
101,6 6,0 14,1 18,0 207 3,39 40,7 54,9 413 81,4 0,319 70,7
101,6 6,3 14,8 18,9 215 3,38 42,3 57,3 430 84,7 0,319 67,5
114,3 2,5 6,89 8,78 137 3,95 24,0 31,3 275 48,0 0,359 145
114,3 3,0 8,23 10,5 163 3,94 28,4 37,2 325 56,9 0,359 121
114,3 4,0 10,9 13,9 211 3,90 36,9 48,7 422 73,9 0,359 91,9
114,3 5,0 13,5 17,2 257 3,87 45,0 59,8 514 89,9 0,359 74,2
114,3 6,0 16,0 20,4 300 3,83 52,5 70,4 600 105 0,359 62,4
114,3 6,3 16,8 21,4 313 3,82 54,7 73,6 625 109 0,359 59,6
114,3 8,0 21,0 26,7 379 3,77 66,4 90,6 759 133 0,359 47,7
139,7 3,0 10,1 12,9 301 4,83 43,1 56,1 602 86,2 0,439 98,9
139,7 4,0 13,4 17,1 393 4,80 56,2 73,7 786 112 0,439 74,7
139,7 5,0 16,6 21,2 481 4,77 68,8 90,8 961 138 0,439 60,2
139,7 6,0 19,8 25,2 564 4,73 80,8 107 1 129 162 0,439 50,5
139,7 6,3 20,7 26,4 589 4,72 84,3 112 1 177 169 0,439 48,2

10 © ISO 2011 – All rights reserved

Table 6 (continued)
Surface Nominal
Mass per Cross- Second Radius Elastic Plastic Torsional Torsional
Outside area per length
Thickness unit sectional moment of section section inertia modulus
Diameter metre per
length area of area gyration modulus modulus constant constant
length tonne
D T M A I i W W I C A
el pl t t s
2 4 3 3 4 3 2
mm mm kg/m cm cm cm cm cm cm cm m/m m
139,7 8,0 26,0 33,1 720 4,66 103 139 1 441 206 0,439 38,5
139,7 10,0 32,0 40,7 862 4,60 123 169 1 724 247 0,439 31,3
168,3 3,0 12,2 15,6 532 5,85 63,3 82,0 1 065 127 0,529 81,8
168,3 4,0 16,2 20,6 697 5,81 82,8 108 1 394 166 0,529 61,7
168,3 5,0 20,1 25,7 856 5,78 102 133 1 712 203 0,529 49,7
168,3 6,0 24,0 30,6 1 009 5,74 120 158 2 017 240 0,529 41,6
168,3 6,3 25,2 32,1 1 053 5,73 125 165 2 107 250 0,529 39,7
168,3 8,0 31,6 40,3 1 297 5,67 154 206 2 595 308 0,529 31,6
168,3 10,0 39,0 49,7 1564 5,61 186 251 3 128 372 0,529 25,6
177,8 4,0 17,1 21,8 825 6,15 92,8 121 1 650 186 0,559 58,3
177,8 5,0 21,3 27,1 1 014 6,11 114 149 2 028 228 0,559 46,9
177,8 6,0 25,4 32,4 1 196 6,08 135 177 2 392 269 0,559 39,3
177,8 6,3 26,6 33,9 1 250 6,07 141 185 2 499 281 0,559 37,5
177,8 8,0 33,5 42,7 1 541 6,01 173 231 3 083 347 0,559 29,9
177,8 10,0 41,4 52,7 1 862 5,94 209 282 3 724 419 0,559 24,2
177,8 12,0 49,1 62,5 2 159 5,88 243 330 4 318 486 0,559 20,4
177,8 12,5 51,0 64,9 2 230 5,86 251 342 4 460 502 0,559 19,6
193,7 4,0 18,7 23,8 1 073 6,71 111 144 2 146 222 0,609 53,4
193,7 5,0 23,3 29,6 1 320 6,67 136 178 2 640 273 0,609 43,0
193,7 6,0 27,8 35,4 1 560 6,64 161 211 3 119 322 0,609 36,0
193,7 6,3 29,1 37,1 1 630 6,63 168 221 3 260 337 0,609 34,3
193,7 8,0 36,6 46,7 2 016 6,57 208 276 4 031 416 0,609 27,3
193,7 10,0 45,3 57,7 2 442 6,50 252 338 4 883 504 0,609 22,1
193,7 12,0 53,8 68,5 2 839 6,44 293 397 5 678 586 0,609 18,6
193,7 12,5 55,9 71,2 2 934 6,42 303 411 5 869 606 0,609 17,9
219,1 4,0 21,2 27,0 1 564 7,61 143 185 3 128 286 0,688 47,1
219,1 5,0 26,4 33,6 1 928 7,57 176 229 3 856 352 0,688 37,9
219,1 6,0 31,5 40,2 2 282 7,54 208 273 4 564 417 0,688 31,7
219,1 6,3 33,1 42,1 2 386 7,53 218 285 4772 436 0,688 30,2
219,1 8,0 41,6 53,1 2 960 7,47 270 357 5 919 540 0,688 24,0
219,1 10,0 51,6 65,7 3 598 7,40 328 438 7 197 657 0,688 19,4
219,1 12,0 61,3 78,1 4 200 7,33 383 515 8 400 767 0,688 16,3
219,1 12,5 63,7 81,1 4 345 7,32 397 534 8 689 793 0,688 15,7
244,5 5,0 29,5 37,6 2 699 8,47 221 287 5 397 441 0,768 33,9
244,5 6,0 35,3 45,0 3 199 8,43 262 341 6 397 523 0,768 28,3
244,5 6,3 37,0 47,1 3 346 8,42 274 358 6 692 547 0,768 27,0
244,5 8,0 46,7 59,4 4 160 8,37 340 448 8 321 681 0,768 21,4
244,5 10,0 57,8 73,7 5 073 8,30 415 550 10 146 830 0,768 17,3
244,5 12,0 68,8 87,7 5 938 8,23 486 649 11 877 972 0,768 14,5
244,5 12,5 71,5 91,1 6 147 8,21 503 673 12 295 1 006 0,768 14,0

Table 6 (continued)
Surface Nominal
Mass per Cross- Second Radius Elastic Plastic Torsional Torsional
Outside area per length
Thickness unit sectional moment of section section inertia modulus
Diameter metre per
length area of area gyration modulus modulus constant constant
length tonne
D T M A I i W W I C A
el pl t t s
2 4 3 3 4 3 2
mm mm kg/m cm cm cm cm cm cm cm m/m m
273,0 5,0 33,0 42,1 3 781 9,48 277 359 7 562 554 0,858 30,3
273,0 6,0 39,5 50,3 4 487 9,44 329 428 8 974 657 0,858 25,3
273,0 6,3 41,4 52,8 4 696 9,43 344 448 9 392 688 0,858 24,1
273,0 8,0 52,3 66,6 5 852 9,37 429 562 11 703 857 0,858 19,1
273,0 10,0 64,9 82,6 7 154 9,31 524 692 14 308 1 048 0,858 15,4
273,0 12,0 77,2 98,4 8 396 9,24 615 818 16 792 1 230 0,858 12,9
323,9 6,0 47,0 59,9 7 572 11,2 468 606 15 145 935 1,02 21,3
323,9 6,3 49,3 62,9 7 929 11,2 490 636 15 858 979 1,02 20,3
323,9 8,0 62,3 79,4 9 910 11,2 612 799 19 820 1 224 1,02 16,0
323,9 10,0 77,4 98,6 12 158 11,1 751 986 24 317 1 501 1,02 12,9
323,9 12,0 92,3 118 14 320 11,0 884 1 168 28 639 1 768 1,02 10,8
323,9 12,5 96,0 122 14 847 11,0 917 1 213 29 693 1 833 1,02 10,4
355,6 5,0 43,2 55,1 8 464 12,4 476 615 16 927 952 1,12 23,1
355,6 6,0 51,7 65,9 10 071 12,4 566 733 20 141 1 133 1,12 19,3
355,6 6,3 54,3 69,1 10 547 12,4 593 769 21 094 1 186 1,12 18,4
355,6 8,0 68,6 87,4 13 201 12,3 742 967 26 403 1 485 1,12 14,6
355,6 10,0 85,2 109 16 223 12,2 912 1 195 32 447 1 825 1,12 11,7
355,6 12,0 102 130 19 139 12,2 1 076 1 417 38 279 2 153 1,12 9,83
355,6 12,5 106 135 19 852 12,1 1 117 1 472 39 704 2 233 1,12 9,45
355,6 16,0 134 171 24 663 12,0 1 387 1 847 49 326 2 774 1,12 7,46
355,6 20,0 166 211 29 792 11,9 1 676 2 255 59 583 3 351 1,12 6,04
406,4 6,0 59,2 75,5 15 128 14,2 745 962 30 257 1 489 1,28 16,9
406,4 6,3 62,2 79,2 15 849 14,1 780 1 009 31 699 1 560 1,28 16,1
406,4 8,0 78,6 100 19 874 14,1 978 1 270 39 748 1 956 1,28 12,7
406,4 10,0 97,8 125 24 476 14,0 1 205 1 572 48 952 2 409 1,28 10,2
406,4 12,0 117 149 28 937 14,0 1 424 1 867 57 874 2848 1,28 8,57
406,4 12,5 121 155 30 031 13,9 1 478 1 940 60 061 2 956 1,28 8,24
406,4 16,0 154 196 37 449 13,8 1 843 2 440 74 898 3 686 1,28 6,49
406,4 20,0 191 243 45 432 13,7 2 236 2 989 90 864 4 472 1,28 5,25
406,4 25,0 235 300 54 702 13,5 2 692 3 642 109 404 5 384 1,28 4,25
457,0 6,0 66,7 85,0 21 618 15,9 946 1 220 43 236 1 892 1,44 15,0
457,0 6,3 70,0 89,2 22 654 15,9 991 1 280 45 308 1 983 1,44 14,3
457,0 8,0 88,6 113 28 446 15,9 1 245 1 613 56 893 2 490 1,44 11,3
457,0 10,0 110 140 35 091 15,8 1 536 1 998 70 183 3 071 1,44 9,07
457,0 12,0 132 168 41 556 15,7 1 819 2 377 83 113 3 637 1,44 7,59
457,0 12,5 137 175 43 145 15,7 1 888 2 470 86 290 3 776 1,44 7,30
457,0 16,0 174 222 53 959 15,6 2 361 3 113 107 919 4 723 1,44 5,75
457,0 20,0 216 275 65 681 15,5 2 874 3 822 131 363 5 749 1,44 4,64
457,0 25,0 266 339 79 415 15,3 3 475 4 671 158 830 6 951 1,44 3,75
457,0 30,0 316 402 92 173 15,1 4 034 5 479 184 346 8 068 1,44 3,17

12 © ISO 2011 – All rights reserved

Table 6 (continued)
Surface Nominal
Mass per Cross- Second Radius Elastic Plastic Torsional Torsional
Outside area per length
Thickness unit sectional moment of section section inertia modulus
Diameter metre per
length area of area gyration modulus modulus constant constant
length tonne
D T M A I i W W I C A
el pl t t s
2 4 3 3 4 3 2
mm mm kg/m cm cm cm cm cm cm cm m/m m
508,0 6,0 74,3 94,6 29 812 17,7 1 174 1 512 59 623 2 347 1,60 13,5
508,0 6,3 77,9 99,3 31 246 17,7 1 230 1 586 62 493 2 460 1,60 12,8
508,0 8,0 98,6 126 39 280 17,7 1 546 2 000 78 560 3 093 1,60 10,1
508,0 10,0 123 156 48 520 17,6 1 910 2 480 97 040 3 820 1,60 8,14
508,0 12,0 147 187 57 536 17,5 2 265 2 953 115 072 4 530 1,60 6,81
508,0 12,5 153 195 59 755 17,5 2 353 3 070 119 511 4 705 1,60 6,55
508,0 16,0 194 247 74 909 17,4 2 949 3 874 149 818 5 898 1,60 5,15
508,0 20,0 241 307 91 428 17,3 3 600 4 766 182 856 7 199 1,60 4,15
508,0 25,0 298 379 110 918 17,1 4 367 5 837 221 837 8 734 1,60 3,36
508,0 30,0 354 451 129 173 16,9 5 086 6 864 258 346 10 171 1,60 2,83
610,0 6,0 89,4 114 51 924 21,4 1 702 2 189 103 847 3 405 1,92 11,2
610,0 6,3 93,8 119 54 439 21,3 1 785 2 296 108 878 3 570 1,92 10,7
610,0 8,0 119 151 68 551 21,3 2 248 2 899 137 103 4 495 1,92 8,42
610,0 10,0 148 188 84 847 21,2 2 782 3 600 169 693 5 564 1,92 6,76
610,0 12,0 177 225 100 814 21,1 3 305 4 292 201 627 6 611 1,92 5,65
610,0 12,5 184 235 104 755 21,1 3 435 4 463 209 509 6 869 1,92 5,43
610,0 16,0 234 299 131 781 21,0 4 321 5 647 263 563 8 641 1,92 4,27
610,0 20,0 291 371 161 490 20,9 5 295 6 965 322 979 10 589 1,92 3,44
610,0 25,0 361 459 196 906 20,7 6 456 8 561 393 813 12 912 1,92 2,77
610,0 30,0 429 547 230 476 20,5 7 557 10 101 460 952 15 113 1,92 2,33
711,0 6,0 104 133 82 568 24,9 2 323 2 982 165 135 4 645 2,23 9,59
711,0 6,3 109 139 86 586 24,9 2 436 3 129 173 172 4 871 2,23 9,13
711,0 8,0 139 177 109 162 24,9 3 071 3 954 218 324 6 141 2,23 7,21
711,0 10,0 173 220 135 301 24,8 3 806 4 914 270 603 7 612 2,23 5,78
711,0 12,0 207 264 160 991 24,7 4 529 5 864 321 981 9 057 2,23 4,83
711,0 12,5 215 274 167 343 24,7 4 707 6 099 334 686 9 415 2,23 4,64
711,0 16,0 274 349 211 040 24,6 5 936 7 730 422 080 11 873 2,23 3,65
711,0 20,0 341 434 259 351 24,4 7 295 9 552 518 702 14 591 2,23 2,93
711,0 25,0 423 539 317 357 24,3 8 927 11 770 634 715 17 854 2,23 2,36
711,0 30,0 504 642 372 790 24,1 10 486 13 922 745 580 20 973 2,23 1,98
762,0 6,0 112 143 101 813 26,7 2 672 3 429 203 626 5 345 2,39 8,94
762,0 6,3 117 150 106 777 26,7 2 803 3 598 213 555 5 605 2,39 8,52
762,0 8,0 149 190 134 683 26,7 3 535 4 548 269 366 7 070 2,39 6,72
762,0 10,0 185 236 167 028 26,6 4 384 5 655 334 057 8 768 2,39 5,39
762,0 12,0 222 283 198 855 26,5 5 219 6 751 397 710 10 439 2,39 4,51
762,0 12,5 231 294 206 731 26,5 5 426 7 023 413 462 10 852 2,39 4,33
762,0 16,0 294 375 260 973 26,4 6 850 8 906 521 947 13 699 2,39 3,40
762,0 20,0 366 466 321 083 26,2 8 427 11 014 642 166 16 855 2,39 2,73
762,0 25,0 454 579 393 461 26,1 10 327 13 584 786 922 20 654 2,39 2,20
762,0 30,0 542 690 462 853 25,9 12 148 16 084 925 706 24 297 2,39 1,85

Table 6 (continued)
Surface Nominal
Mass per Cross- Second Radius Elastic Plastic Torsional Torsional
Outside area per length
Thickness unit sectional moment of section section inertia modulus
Diameter metre per
length area of area gyration modulus modulus constant constant
length tonne
D T M A I i W W I C A
el pl t t s
2 4 3 3 4 3 2
mm mm kg/m cm cm cm cm cm cm cm m/m m
813,0 8,0 159 202 163 901 28,5 4 032 5 184 327 801 8 064 2,55 6,30
813,0 10,0 198 252 203 364 28,4 5 003 6 448 406 728 10 006 2,55 5,05
813,0 12,0 237 302 242 235 28,3 5 959 7 700 484 469 11 918 2,55 4,22
813,0 12,5 247 314 251 860 28,3 6 196 8 011 503 721 12 392 2,55 4,05
813,0 16,0 314 401 318 222 28,2 7 828 10 165 636 443 15 657 2,55 3,18
813,0 20,0 391 498 391 909 28,0 9 641 12 580 783 819 19 282 2,55 2,56
813,0 25,0 486 619 480 856 27,9 11 829 15 529 961 713 23 658 2,55 2,06
813,0 30,0 579 738 566 374 27,7 13 933 18 402 1 132 748 27 866 2,55 1,73
914,0 8,0 179 228 233 651 32,0 5 113 6 567 467 303 10 225 2,87 5,59
914,0 10,0 223 284 290 147 32,0 6 349 8 172 580 294 12 698 2,87 4,49
914,0 12,0 267 340 345 890 31,9 7 569 9 764 691 779 15 137 2,87 3,75
914,0 12,5 278 354 359 708 31,9 7 871 10 159 719 417 15 742 2,87 3,60
914,0 16,0 354 451 455 142 31,8 9 959 12 904 910 284 19 919 2,87 2,82
914,0 20,0 441 562 561 461 31,6 12 286 15 987 1 122 922 24 572 2,87 2,27
914,0 25,0 548 698 690 317 31,4 15 105 19 763 1 380 634 30 211 2,87 1,82
914,0 30,0 654 833 814 775 31,3 17 829 23 453 1 629 550 35 658 2,87 1,53
1 016,0 8,0 199 253 321 780 35,6 6 334 8 129 643 560 12 668 3,19 5,03
1 016,0 10,0 248 316 399 850 35,6 7 871 10 121 799 699 15 742 3,19 4,03
1 016,0 12,0 297 378 476 985 35,5 9 389 12 097 953 969 18 779 3,19 3,37
1 016,0 12,5 309 394 496 123 35,5 9 766 12 588 992 246 19 532 3,19 3,23
1 016,0 16,0 395 503 628 479 35,4 12 372 16 001 1 256 959 24 743 3,19 2,53
1 016,0 20,0 491 626 776 324 35,2 15 282 19 843 1 552 648 30 564 3,19 2,04
1 016,0 25,0 611 778 956 086 35,0 18 821 24 557 1 912 173 37 641 3,19 1,64
1 016,0 30,0 729 929 1 130 352 34,9 22 251 29 175 2 260 704 44 502 3,19 1,37
1 067,0 10,0 261 332 463 792 37,4 8 693 11 173 927 585 17 387 3,35 3,84
1 067,0 12,0 312 398 553 420 37,3 10 373 13 357 1 106 840 20 747 3,35 3,20
1 067,0 12,5 325 414 575 666 37,3 10 790 13 900 1 151 332 21 581 3,35 3,08
1 067,0 16,0 415 528 729 606 37,2 13 676 17 675 1 459 213 27 352 3,
...