Theoretically Steel Weight Formula

Cold galvanizing (electric galvanized) is in the plating bath by current unipolarity zinc plating on metal surface gradually, production speed is slow, uniform coating, the thickness of thin, usually only 3-15 microns, bright appearance, corrosion resistance is poor, usually a few months will rust.

Theoretical Weight Calculation Formula Of Steel

 Name          Formula Symbol Meaning
Steel Bar/Wire Rod(kg/m)
W=0.006165*d*d
d=diameter(mm)
Screw Thread(kg/m)
W=0.00617*d*d
d=section diameter(mm)
Square Steel (kg/m)
W=0.00785*a*a
a=side width(mm)
Flat steel (kg/m)
W=0.00785*b*d
 d=thickness(mm)

b=side width(mm)
Hexagonal steel(kg/m)
W=0.006798*s*s
s=side distance(mm)
Octagonal steel(kg/m)
W=0.0065*s*s
s=side distance(mm)
Equilateral angle steel(kg/m)
W=0.00785*[d(2b-d)+0.215(R*R-2r*r)]
 B=width   r=????

R=inner semidiameter

D=thickness
Inequilateral angle steel(kg/m)
W=0.00785*[d(B+b-d)+0.215(R*R-2r*r)]
 B=long side width

B=short side width

D=thickness

r=????

R=inner semidiameter
Channel steel(kg/m)
W=0.00785?/SPAN>[hd+2t(b-d)+0.349(R*R-r*r)]
 h=height   d=thickness

b=length of leg

R=inner semidiameter

T=average thickness of leg
I-section steel(kg/m)
W=0.00785?SPAN lang=EN-US>[hd+2t(b-d)+0.615(R*R-r*r)]
 h=height  d=thickness  b=length
R=inner semidiameter t=average thickness of leg
Steel plate(kg/?)
W=7.85*d
d=thickness
Steel pipe
[including no-seam & welded pipe]  (kg/m)
W=0.02466*s(d-s)
d=outer diameter
s=thickness

Theoretical Steel Weight Form        Pipe: kg/m    Panel: kg/m2

Hot plate Checker plate  Square steel  I-section steel  Galv. flat steel  Electric wire tube  Galv. angle steel
Spec Weight Spec Weight Spec Weight Spec Weight Spec Weight Spec Weight Spec Weight
0.5 3.925 2.5 22.6 10*10 0.785 10# 11.261 25*4 0.827 15 0.625 40*4 2.567
0.75 5.888 3 26.6 12*12 1.13 12# 13.98 30*3 0.753 20 0.766 50*5 3.996
0.8 6.28 3.5 30.5 14*14 1.54 14# 16.89 40*4 1.325 25 1.048    
1 7.85 4 34.4 16*16 2.01 16# 20.516     32 1.329    
1.2 9.42 4.5 38.3 18*18 2.54 18# 24.143     40 1.611    
1.5 11.78 5 42.3 20*20 3.14 20b# 31.069     50 2.407    
2 15.7 6 50.1 25*25 4.91 22b# 36.524            
2.5 19.63 8 65.8 30*30 7.06 25b# 42.03            
3 23.55         28b# 47.888            
4 31.4         30b# 48.084            
5 39.25
6 47.1
8 62.8
10 78.5
12 94.2
14 109.9
Round & Deformed Channel steel  Welded steel pipe  Galv. pipe  Angle steel  Flat steel  no-seam steel pipe
Spec Weight Spec Weight Spec Weight Spec Weight  Spec Weight Spec Weight Spec Weight
6.5 0.26 5# 5.438 15 1.26 15 1.33 25*25*3 1.124 3*16 0.38 25*2.5 1.39
8 0.395 6.5# 6.709 20 1.63 20 1.73 30*30*3 1.373 4*16 0.50 32*3 2.15
10 0.617 8# 8.045 25 2.42 25 2.57 40*40*4 2.422 3*20 0.47 38*3 2.59
12 0.888 10# 10.007 32 3.13 32 3.32 50*50*5 3.77 4*20 0.63 45*4 4.04
14 1.21 12# 12.059 40 3.84 40 4.07 63*63*6 5.721 4*25 0.78 51*4 4.63
16 1.58 14a# 14.535 50 4.88 50 5.17 70*70*7 7.398 3*30 0.71 57*4 5.23
18 2 14b# 16.733 65 6.64 65 7.04 75*75*8 9.03 4*40 1.26 76*4.5 7.93
20 2.47 16a# 17.24 80 8.34 80 8.84 75*50*6 5.699 6*40 1.88 89*4.5 9.38
22 2.98 16# 19.752 100 10.85 100 11.5 80*80*8 9.658 5*50 1.96 108*4.5 11.49
25 3.85 18a# 20.174 125 15.04 125 15.94 90*90*7 9.656 8*50 3.14 127*4.5 13.59
28 4.83 18# 23 150 17.81 150 18.88 90*90*9 12.717 6*60 2.83 133*5 15.78
32 6.31 20a# 22.637 200 26.39         8*80 5.02 159*6 22.64
    20# 25.777             8*100 6.28 219*7 36.6
    22# 28.453             10*100 7.85 219*8 41.65
    25b# 31.335                 325*10 77.68
    28# 35.823                 377*12 108.02
    30# 39.173