六角钢和八角钢的截面尺寸、理论重量及允许偏差一应符合下表的规定

对边距离S mm

允许偏差, mm

截面面积A, cm²

理论重量, kg/m

1组

2组

3组

六角钢

八角钢

六角钢

八角钢

8

±0.25

±0.35

±0.40

0.544 3

-

0.435

-

9

0.701 5

-

0.551

-

10

0.866

-

0.680

-

11

1.048

-

0.823

-

12

1.247

-

0.979

-

13

1.464

-

1.15

-

14

1.697

-

1.33

-

15

1.949

-

1.53

-

16

2.217

2.120

1.74

1.66

17

2.503

-

1.96

-

18

2.808

2.683

2.20

2.16

19

3.126

-

2.45

-

20

3.464

3.312

2.72

2.60

21

±0.30

±0.40

±0.50

3.819

-

3.00

22

4.192

4.088

3.29

3.15

23

4.581

-

3.60

-

24

4.988

-

3.92

-

25

5.413

5.175

4.25

4.06

26

5.854

-

4.60

-

27

6.314

-

4.96

-

28

6.790

6.492

5.33

5.10

30

7.794

7.452

6.12

5.85

32

±0.40

±0.50

±0.60

8.868

8.479

6.96

6.66

34

10.011

9.572

7.86

7.51

36

11.223

10.731

8.81

8.42

38

12.505

11.956

9.82

9.39

40

13.86

13.25

10.88

10.40

42

15.28

-

11.99

-

45

17.54

-

13.77

-

48

19.95

-

15.66

-

50

21.65

-

17.00

-

53

±0.60

±0.70

±0.80

24.33

-

19.10

-

56

27.16

-

21.32

-

58

29.13

-

22.87

-

60

31.18

-

24.50

-

63

34.37

-

26.98

-

65

36.59

-

28.72

-

68

40.04

-

31.43

-

70

42.53

-

33.30

-