Page 25 - square pipe

SQUARE PIPE
Size and Properties
มอก.107-2561
Grade : STKR400
B
T
H
มอก. 107-2561

SIAZES 125 x 125 x t
H x A x C
( mm. )
Thickness Section Area Weight Moment of inertia Radious of Gyration Modulus of Section
( Unit : mm ) ( Unit : cm .) 2 ( Unit : kg./m.) ( Unit : cm .) 4 ( Unit : cm.) ( Unit : cm .) 3
t Area cm 2 kg./m l x l y i x i y z x z y
2.3 11.15 8.75 277.85 277.85 4.99 4.99 44.46 44.46
2.5 12.09 9.49 300.04 300.04 4.98 4.98 48.01 48.01
2.8 13.48 10.59 332.74 332.74 4.97 4.97 53.24 53.24
3.2 15.33 12.03 375.29 375.29 4.95 4.95 60.05 60.05
3.6 17.15 13.46 416.66 416.66 4.93 4.93 66.67 66.67
4.0 18.95 14.87 456.86 456.86 4.91 4.91 73.10 73.10
4.5 21.17 16.62 505.50 505.50 4.89 4.89 80.88 80.88
5.0 23.36 18.33 552.38 552.38 4.86 4.86 88.38 88.38
6.0 27.63 21.69 641.04 641.04 4.82 4.82 102.57 102.57
8.0 35.79 28.10 798.93 798.93 4.72 4.72 127.83 127.83
9.0 39.68 31.14 868.72 868.72 4.68 4.68 139.00 139.00
% Chemical Composition (Max) Mechanical Properties (Min)
Grade
C Si Mn P S Yield Strength Tensile Strength Elongation
MPa
%
MPa
STKR290 - - - 0.050 0.050 - 290 -
STKR400 0.25 - - 0.040 0.040 245 400 23
STKR490 0.18 0.55 1.50 0.040 0.040 325 490 23