51 steel pipe net supply: calculation formula of various theoretical weight of steel pipe (calculated per m weight)
The weight of the steel pipe = 0.25 × π × (diameter outside diameter - inside diameter squared) × L × steel specific gravity where: π = 3.14 L = length of steel pipe Steel weight 7.8 so the weight of steel = 0.25 × 3.14 × (diameter outside diameter - inside diameter Square) × L × 7.8 * If the size unit is in meters (M), the calculated weight result is kg (Kg)
The density of steel is: 7.85g/cm3
Steel theoretical weight Calculation The theoretical weight of steel is calculated in kilograms (kg). The basic formula is:
W (weight, kg) = F (cross-sectional area mm2) × L (length, m) × Ï (density, g/cm3) × 1/1000
The formula for calculating the theoretical weight of various steels is as follows:
Name (unit)
Calculation formula symbol meaning calculation example
Round steel rod (kg/m)
W= 0.006165 ×d×d
d = diameter mm
100 mm diameter round steel, for every m weight. Weight per m = 0.006165 × 1002 = 61.65kg
Rebar (kg/m)
W= 0.00617 ×d×d
d= section diameter mm
Rebar 12 mm in diameter, for every m of weight. Weight per m = 0.00617 × 12 2 = 0.89 kg
Square steel (kg/m)
W= 0.00785 ×a ×a
a= width mm
Square steel with a width of 20 mm, for every m of weight. Weight per m = 0.00785 × 202 = 3.14kg
Flat steel (kg/m)
W= 0.00785 ×b ×d
b= side width mm
d= Thickness mm
Flat steel with a width of 40 mm and a thickness of 5 mm, for every m of weight. Weight per m = 0.00785 × 40 × 5 = 1.57kg
Hexagonal steel (kg/m)
W= 0.006798 × s × s
s= distance to the side mm
Hexagonal steel with an edge distance of 50 mm is calculated for every m of weight. Weight per m = 0.006798 × 502 = 17kg
Octagonal steel (kg/m)
W= 0.0065 ×s ×s
s= distance to the side mm
For octagonal steel 80 mm from the side, calculate the weight per m. Weight per m = 0.0065 × 802 = 41.62kg
Equal angle steel (kg/m)
= 0.00785 × [d (2b · d) + 0.215 (R2 · 2r 2 )]
b= side width
d= edge thickness
R= radius of inner arc
r = radius of end arc for each mm of equilateral angle steel 20 mm × 4 mm. The R of a 4mm × 20mm equilateral angle steel is found from the catalogue of metallurgical products to be 3.5, r is 1.2, then every m weight = 0.00785 × [4 × (2 × 20 × 4) + 0.215 × (3.52 × 2 × 1.2 2 )]=1.15kg
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= edge thickness
R= radius of inner arc
r = radius of end arc for each mm weight of unequal angle steel 30 mm × 20 mm × 4 mm. According to the metallurgical product catalogue, when R is 3.5 for an unequal angle steel of 30 × 20 × 4 and r is 1.2, the weight per m = 0.00785 × [4 × (30 + 20 × 4) + 0.215 × (3.52 × 2 × × 1.2 2 )]=1.46kg
Channel steel (kg/m)
W=0.00785 ×[hd+2t (b d d )+0.349 (R2 r r 2 )]
h= high
b= leg length
d= waist thickness
t= average leg thickness
R= radius of inner arc
r = end-arc radius per m of weight for 80 mm × 43 mm × 5 mm channel steel. From the metallurgical product catalog, find out that the channel steel t is 8, R is 8, and r is 4, then every m weight = 0.00785 × [80 × 5 + 2 × 8 × (43 ? 5) + 0.349 × (82? 4 2)]=8.04kg
I-beam (kg/m)
W= 0.00785 ×[hd+2t (b d d )+0.615 (R2 r r 2 )]
h= high
b= leg length
d= waist thickness
t= average leg thickness
R= radius of inner arc
r = Radius of end radius of 250 mm × 118 mm × 10 mm of H-beam per m weight. From the manual of metal materials, find out that the I-steel t is 13, 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
Steel plate (kg/m2)
W= 7.85 ×d
d = 4mm thick steel plate, weight per m2. Weight per m2 = 7.85 × 4 = 31.4kg
Steel pipe (including seamless steel pipe and welded steel pipe (kg/m)
W= 0.02466 ×S (D ? S )
D= outside diameter
S = Seamless steel pipe with a wall thickness of 60 mm and a wall thickness of 4 mm. Calculate weight per m. Weight per m = 0.02466 × 4 × (60 · 4) = 5.52kg
Information Sources:
Xi'an Jmlai Bio-Tech Co., Ltd. , https://www.jmlaisarms.com