Page 30 - square pipe

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

มอก. 107-2561

SIAZES 300 x 300 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 52.67 41.34 7,620.54 7,620.54 12.03 12.03 508.04 508.04
5.00 58.36 45.81 8,409.67 8,409.67 12.00 12.00 560.64 560.64
6.00 69.63 54.66 9,954.51 9,954.51 11.96 11.96 663.63 663.63
8.00 91.79 72.06 12,913.14 12,913.14 11.86 11.86 860.88 860.88
9.00 102.68 80.60 14,328.40 14,328.40 11.81 11.81 955.23 955.23
10.00 113.43 89.04 15,701.95 15,701.95 11.77 11.77 1,046.80 1,046.80
12.00 134.53 105.61 18,326.79 18,326.79 11.67 11.67 1,221.79 1,221.79
% 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