Page 19 - square pipe

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

B
T
มอก. 107-2561
H

SIAZES 65 x 65 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
1.7 4.23 3.32 27.97 27.97 2.57 2.57 8.61 8.61
2.0 4.94 3.88 32.28 32.28 2.56 2.56 9.93 9.93
2.3 5.63 4.42 36.42 36.42 2.54 2.54 11.21 11.21
2.5 6.09 4.78 39.08 39.08 2.53 2.53 12.03 12.03
2.7 6.54 5.13 41.67 41.67 2.52 2.52 12.82 12.82
3.2 7.65 6.00 47.82 47.82 2.50 2.50 14.72 14.72
4.0 9.35 7.34 56.76 56.76 2.46 2.46 17.46 17.46
4.5 10.37 8.14 61.80 61.80 2.44 2.44 19.02 19.02
6.0 13.23 10.39 74.64 74.64 2.37 2.37 22.97 22.97
% 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