Page 29 - square pipe

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

มอก. 107-2561

SIAZES 250 x 250 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
4.50 43.67 34.28 4,356.16 4,356.16 9.99 9.99 348.49 348.49
5.00 48.36 37.96 4,800.59 4,800.59 9.96 9.96 384.05 384.05
6.00 57.63 45.24 5,666.66 5,666.66 9.92 9.92 453.33 453.33
7.00 66.78 52.42 6,502.84 6,502.84 9.87 9.87 520.23 520.23
8.00 75.79 59.50 7,309.75 7,309.75 9.82 9.82 584.78 584.78
9.00 84.68 66.47 8,087.98 8,087.98 9.77 9.77 647.04 647.04
10.00 93.43 73.34 8,838.15 8,838.15 9.73 9.73 707.05 707.05
12.00 110.53 86.77 10,256.67 10,256.67 9.63 9.63 820.53 820.53
% 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