Page 23 - square pipe
P. 23
SQUARE PIPE
Size and Properties
มอก.107-2561
Grade : STKR400
B
T
H
มอก. 107-2561
SIAZES 90 x 90 x t
H x A x C
( mm. )
Modulus of Section 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 7.93 6.23 100.70 100.70 3.56 3.56 22.38 22.38
3.2 10.85 8.51 134.42 134.42 3.52 3.52 29.87 29.87
4.0 13.35 10.48 161.91 161.91 3.48 3.48 35.98 35.98
4.5 14.87 11.67 177.95 177.95 3.46 3.46 39.54 39.54
6.0 19.23 15.10 221.13 221.13 3.39 3.39 49.14 49.14
% 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
