Calculation formula for theoretical weight of various steels
 
Angle steel: weight per meter = 0.00785* (side width + side width-side thickness) * side thickness
Round steel: weight per meter = 0.00617 * diameter * diameter (rebar and round steel are the same)
Flat steel: weight per meter=0.00785*thickness*side width
Pipe: Weight per meter=0.0246615*wall thickness* (outer diameter-wall thickness)
Plate: Weight per meter=7.85*thickness
Brass tube: weight per meter=0.02670*wall thickness*(outer diameter-wall thickness)
Copper pipe: weight per meter = 0.02796* wall thickness* (outer diameter-wall thickness)
Aluminum checkered plate: weight per square meter=2.96*thickness
Specific gravity of non-ferrous metals: copper plate 8.9 brass plate 8.5 zinc plate 7.2 lead plate 11.37
The calculation formula of non-ferrous metal sheet : weight per square meter = specific gravity * thickness

 

Steel name	Theoretical weight w/kg. mu-1	Note
Flat steel, steel plate, steel strip	W=0. 00785×width×thickness	1. Accurate calculation of angle steel, I-beam and channel steel The formula is very complicated, and the short form of the table is used to calculate the approximate value.   2. The f-value coefficient: the general model and the one with a are 3. 34, b is 2. 65, c is 2. 26.   3. The coefficient of e: The general model and the one with a are 3. 26, b is 2. 44, c is 2. 24.   4. All length units are mm.
Square steel	W=0. 00785×side length×side length
Round bar, wire, steel wire	W=0.00617×diameter×diameter
Hexagonal steel	W=0. 0068 × distance between opposite sides × distance between opposite sides
Octagonal steel	W=0. 0065 × distance between opposite sides × distance between opposite sides
Steel Pipe	W=0. 02466×Wall thickness (outer wall-wall thickness)
Equilateral Angle Steel	W=0. 00785×side thickness (2 side width-side thickness)
Unequal angle steel	W=0. 00785×side thickness (long side width + rectangular side width-side thick)
I-beam	W=0. 00785×waist thickness [height + f (leg width-waist thickness)]
Channel steel	W=0. 00785×waist thickness [height + e (leg width-waist thickness)]

 
 
 
Stainless steel theoretical weight calculation:
Stainless steel proportion:
●Chrome stainless steel takes 7.75 tons/M3
●Cr-nickel stainless steel takes 7.93 tons/M3
●Iron take 7.87 tons/M3
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Calculation formula of theoretical weight of stainless steel plate
Theoretical weight of steel products Weight (kg) = thickness (mm) × width (mm) × length (mm) × density value
Density steel grade
7.93 201,202,301,302,304,304L,305,321
7.75 405,410,420
7.98 309S,310S,316S,316L,347
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Stainless steel rod, steel wire, theoretical calculation formula
★ Diameter×diameter×0.00609=kg/m (applicable to 410 420 420j2 430 431)
For example: ￠ 50 50×50×0.00609=15.23Kg/m
★Diameter×Diameter×0.00623=kg/m (applicable to 301 303 304 316 316L 321)
For example: ￠ 50 50×50×0.00623=15.575Kg/m
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Stainless steel profile, theoretical calculation formula
◆Hexagonal bar opposite side×opposite side×0.0069=Kg/m
◆Square bar side width×side width×0.00793=Kg/m
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Stainless steel pipe, theoretical calculation formula
(Outer diameter-wall thickness) × wall thickness × 0.02491 = Kg/m
For example ￠ 57×3.5 (57－3.5)×3.5×0.02491=4.66Kg/m
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General formula for calculating the weight of various steel pipes (materials)
The weight of the steel pipe=0.25×π×(outer diameter squared-inner diameter squared)×L×steel specific gravity where: π = 3.14 L=steel length, steel specific gravity is 7.8
Therefore, the weight of the steel pipe=0.25×3.14×(outer diameter squared-inner diameter squared)×L×7.8 * If the unit of measurement is taken in meters (M), the calculated weight result is
Kilogram (Kg)
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The density of steel is: 7.85g/cm3
Calculation of theoretical steel weight
The unit of measurement for calculating the theoretical weight of steel is kilogram (kg). The basic formula is:
W (weight, kg) = F (cross-sectional area mm2) × L (length, m) × ρ (density, g/cm3) × 1/1000
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The calculation formula for the theoretical weight of various steels is as follows:
Round steel wire rod (kg/m)
W = 0.006165 ×d×d
d = diameter mm
For round steel with a diameter of 100 mm, find the weight per m. Weight per m = 0.006165 ×1002=61.65kg
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Rebar (kg/m)
W = 0.00617 ×d×d
d = section diameter mm
For rebar with a section diameter of 12 mm, find the weight per m. Weight per m=0.00617 ×12 2=0.89kg
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Square steel (kg/m)
W = 0.00785 ×a ×a
a = side width mm
For square steel with a side width of 20 mm, find the weight per m. Weight per m = 0.00785 ×202=3.14kg
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Flat steel (kg/m)
W = 0.00785 ×b ×d
b = side width mm
d = thickness mm
For flat steel with a side width of 40 mm and a thickness of 5 mm, find the weight per m. Weight per m = 0.00785 ×40 ×5 = 1.57kg
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Hexagonal steel (kg/m)
W = 0.006798 ×s×s
s = distance between opposite sides mm
For hexagonal steel with a distance of 50 mm from opposite sides, find the weight per m. Weight per m = 0.006798 ×502=17kg
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Octagonal steel (kg/m)
W = 0.0065 ×s ×s
s = distance between opposite sides mm
Octagonal steel with a distance between opposite sides 80 mm, find the weight per m. Weight per m = 0.0065 ×802=41.62kg
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Equilateral angle steel (kg/m)
W= 0.00785 ×[d (2b – d) +0.215 (R2 – 2r 2)]
b = side width
d = side thickness
R = inner arc radius
r = radius of end arc
Find the weight per m of 20 mm × 4mm equilateral angle steel. From the metallurgical product catalog, the R of 4mm × 20 mm equilateral angle steel is
3.5, r is 1.2, then the weight per m = 0.00785 × [4 × (2 × 20 – 4) +0.215 × (3.52 – 2 × 1.2 2 )] = 1.15kg
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Unequal angle steel (kg/m)
W= 0.00785 ×[d (B+b – d) +0.215 (R2 – 2 r 2)]
B = long side width
b = short side width
d = side thickness
R = inner arc radius
r = radius of end arc
Calculate the weight per m of 30 mm ×20mm ×4mm unequal angle steel. Find out 30 × 20 × 4 unequal angle steel from the metallurgical product catalog
R is 3.5 and r is 1.2, then the weight per m = 0.00785 ×[4 ×(30+20 – 4) +0.215 ×(3.52 – 2 ×1.2
2) ]=1.46kg
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Channel steel (kg/m)
W=0.00785 ×[hd+2t (b – d) +0.349 (R2 – r 2)]
h = high
b = leg length
d = waist thickness
t = average leg thickness
R = inner arc radius
r = radius of end arc
Find the weight per m of a channel steel of 80 mm × 43 mm × 5 mm. It is found from the metallurgical product catalog that the channel steel t is 8, R is 8, and r is
4, then the weight per m = 0.00785 × [80 × 5 + 2 × 8 × (43-5) +0.349 × (82-4 2) ]=8.04kg
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I-beam (kg/m)
W= 0.00785 ×[hd+2t (b – d) +0.615 (R2 – r 2)]
h = high
b = leg length
d = waist thickness
t = average leg thickness
R = inner arc radius
r = radius of end arc
Find the weight per m of I-beam of 250 mm ×118mm ×10mm. It is found from the metal material manual that the I-beam t is 13 and R is
10, r is 5, then the weight per m = 0.00785 ×[250 ×10+2 ×13 ×(118 –10) +0.615 ×(102 –5
2) ]=42.03kg
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Steel plate (kg/m2)
W = 7.85 ×d
d = thick
For a steel plate with a thickness of 4mm, find the weight per m2. Weight per m2=7.85 ×4=31.4kg
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Steel pipe (kg/m) (round pipe) Including seamless steel pipe and welded steel pipe
W= 0.0246615 ×S (D – S)
D = outer diameter
S = wall thickness
For seamless steel pipes with an outer diameter of 60 mm and a wall thickness of 4 mm, find the weight per m. Weight per m = 0.02466 × 4 × (60 – 4) =5.52kg
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Rectangular pipe calculation formula: (Calculation formula for square and rectangular (rectangular) cross-section carbon steel pipe)
Weight per meter: kg/m (kilogram/meter) formula: kg/m = (Oc-4Wt) * Wt * 0.00785
Among them: Oc is the outer circumference, Wt is the wall thickness; square Oc=4*a rectangle Oc=2a+2b a,b is the side length
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