Page 27 - square pipe
P. 27
SQUARE PIPE
Size and Properties
มอก.107-2561
Grade : STKR400
B
T
H
มอก. 107-2561
SIAZES 175 x 175 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
4.5 30.17 23.68 1,447.48 1,447.48 6.93 6.93 165.43 165.43
5.0 33.36 26.18 1,589.44 1,589.44 6.90 6.90 181.65 181.65
6.0 39.63 31.11 1,862.68 1,862.68 6.86 6.86 212.88 212.88
9.0 57.68 45.27 2,600.80 2,600.80 6.72 6.72 297.23 297.23
% 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
