Page 22 - square pipe

SQUARE PIPE
Size and Properties
มอก.107-2561
Grade : STRK400
B
T
H
มอก. 107-2561

SIAZES 80 x 80 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 7.01 5.50 69.80 69.80 3.15 3.15 17.45 17.45
2.5 7.59 5.96 75.08 75.08 3.15 3.15 18.77 18.77
3.2 9.57 7.51 92.67 92.67 3.11 3.11 23.17 23.17
4.0 11.75 9.22 111.09 111.09 3.08 3.08 27.77 27.77
4.5 13.07 10.26 121.73 121.73 3.05 3.05 30.43 30.43
6.0 16.83 13.21 149.89 149.89 2.98 2.98 37.47 37.47
% 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