表6 -4 0 冷拔无缝方形钢管的尺寸规格 基本尺寸 截面面积F／cm2 理论质量G／(kg／m) 惯性矩 Jx=Jy／cm4 截面系数 Wx=Wy／cm3 A S mm 12 O.8 1.0 O.348 0 423 O.273 0.332 O.0739 O.0873 O.123 O.146 14 1.0 1.5 0.503 O.712 O.394 O.559 0.144 O.192 O.206 0.274 16 1.O 1.5 O.583 O.832 O.458 0.653 O.222 O.300 O.278 O.374 18 1.O 1.5 2.O 0.663 0.952 1.21 O.521 0.747 O.952 O.324 O.442 0.535 O.360 O.491 0.595 20 1.0 1.5 2.0 2.5 O.743 1.07 1.37 1.64 0.583 O.841 1.08 1.29 O.453 0.624 O.763 O.874 0 453 O.624 O.763 O.874 22 1 1.5 2 2.5 O.823 1.19 1.53 1.84 O.646 O.936 1.20 1.45 O.612 0.850 1.05 1.21 O.556 O.773 O.953 1.10 25 2.5 3 2.14 2.49 1.68 1.95 1.86 2.08 1.49 1.57 30 2.5 3 3.5 4 2.64 3.01 3.50 3.89 2.08 2.42 2.75 3.05 3.41 3.86 4.25 4.58 2.27 2.58 2.83 3.05 32 2.5 3 3.5 2.84 3.33 3 78 2.23 2.61 2.97 4.21 4.79 5.29 2.63 3.00 3.31 32 4 4.21 3.30 5.73 3.58 35 2.5 3 3.5 4 5 3.14 3.69 4.20 4.68 5.58 2.47 2.89 3.30 3.68 4.38 5.54 6.45 7.16 7.78 8.79 3.22 3.68 4.09 4.45 5.02 36 2.5 3 3.5 4 5 3.24 3.81 4.3_4 4.85 5.75 2.55 2.99 3.4l 3.8l 4.53 6.18 7.07 7.87 8.56 9.70 3.43 3.93 4.37 4.76 5.39 40 2.5 3 3.5 4 5 6 3.64 4.29 4.90 5.49 6.58 7.55 2.86 3.37 3.85 4.3l 5.16 5.93 8.68 9.98 11.16 12.21 13.98 15.34 4.34 4.99 5.58 6.1l 6.99 7.67 42 2.5 3 3.5 3.84 4.53 5.18 3.02 3.55 4.07 10.15 11.70 13.10 4.83 5.57 6.24 4 5 6 5.81 6.98 8.03 4.56 5.48 6.30 14.37 16.56 18.22 6.84 7.87 8.58 45 3.5 4 5 5.60 6.23 7.58 4.40 4.94 5.95 16.43 18.07 20.90 7.30 8.03 9.29 45 6 7 8 8.75 9.81 10.8 6.87 7.80 8.44 23.19 24.97 26.30 lO.31 11.10 11.59 50 4 5 6 7 8 7.09 8.58 9.95 11.21 12.35 5.56 6.73 7.8l 8.80 9.70 25.56 29.81 33.35 36.23 38.51 10.22 11.93 13.34 14.49 15.41 55 4 5 6 7 8 7.8...
