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Calculation formula of theoretical weight of steel

The unit of measurement for calculating the theoretical weight of steel is kilogram (kg).

The basic formula is:

W (weight kg) =F (section area mm2) ×L (length m) ×ρ (density g/cm3) ×1/1000

The density ρ of steel is 7.85g/cm3, and the theoretical weight calculation formula of various steels is as follows:

Round steel/wire rod



Unit:kg/m

Calculation formula:W=0.006165×d2

Formula description:d= diameter mm,

Calculation example:100mm diameter round steel, weight per m. Weight per m =0.006165×1002=61.65kg

Steel weight calculation formula, walking steel city must!

rebar

Unit:kg/m

Calculation formula:W=0.00617×d2

Formula description:d= section diameter mm

Calculation example:section diameter of 12mm rebar, weight per m. Weight per m =0.00617×122 ≈0.89kg

Square steel

Unit:kg/m

Calculation formula:W=0.00785×a2

Formula description:a= side width=100% mm

Calculation example:square steel with a side width=100% of 20mm, calculate the weight per m. Weight per m =0.00785×202=3.14kg

Flat steel
Calculation unit:kg/m Calculation formula:W=0.00785×b×d Formula description:b= side width=100%, d= thickness mm Calculation example:Calculate the weight per m of flat steel with a side width=100% of 40mm and a thickness of 5mm. Weight per m =0.00785×40×5=1.57kg steel weight calculation formula, walking steel market must! Hexagonal steel calculation unit:kg/m Calculation formula:W=0.006798×s2 Formula description:s= opposite side distance mm Calculation Example:the opposite side distance 50mm hexagonal steel, calculate the weight per m. Weight per m =0.006798×502=16.995kg octagonal steel Calculation unit:kg/m Calculation formula:W=0.0065×s2 Formula description:s= opposite side distance mm Calculation Example:the opposite side distance of 80mm octagonal steel, calculate the weight per m. Weight per m =0.0065×802=41.6kg equal side Angle steel Calculation unit:kg/m Calculation formula:W=0.00785×[d (2b - d) +0.215 (R2-2R2)) Formula description:b= side width=100%, d= side thickness, R= inner arc radius, r= end arc radius (outer arc) Calculation example:Find the weight per m of 20mm x 4mm equilateral Angle steel. From the metallurgical product catalog, it is found that the R of 4mm×20mm equilateral Angle steel is 3.5 and r is 1.2, then the weight per m =0.00785×[4× (2×20 -- 4) +0.215× (3.52 -- 2×1.22)]=1.15kg unequal Angle steel calculation unit:kg/m Calculation formula:W=0.00785×[d (B+ b-d) +0.215 (R2-2R2))] formula:B= long side width=100%, b= short side width=100%, d= side thickness, R= inner arc radius, r= end arc radius Calculation example:Calculate the weight per m of 30mm×20mm×4mm unequal Angle steel. From the metallurgical product catalog, the R of 30×20×4 unequal Angle steel is 3.5 and r is 1.2, then the weight per m =0.00785×[4× (30+20-4) +0.215× (3.52-2×1.22)]=1.46kg channel steel
Calculation unit:kg/m Calculation formula:W=0.00785×[hd+2t (b-d) +0.349 (R2-R2)] The formula is as follows:h= height=100%, b= leg length, d= waist thickness, t= average leg thickness, R= inner arc radius, r= end arc radius Calculation Example:Calculate the weight per m of 80mm x 43mm x 5mm channel steel. From the metallurgical product catalog found that the channel steel t is 8, R is 8, r is 4, then the weight per m =0.00785×[80×5+2×8× (43 -- 5) +0.349× (82 -- 42)]=8.04kg I-steel calculation unit:kg/m Calculation formula:W=0.00785×[hd+2t (b-d) +0.615 (R2-R2))] The formula is described as follows:h= height=100%, b= leg length, d= waist thickness, t= average leg thickness, R= inner arc radius, r= end arc radius Calculation example:Calculate the weight per m of 250mm×118mm×10mm I-steel. From the metal material manual found 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× (102-52)]=42.03kg steel plate calculation unit:kg/m2 Calculation formula:W=7.85×d Formula description:d= Thickness calculation example:thickness of 4mm steel plate, find the weight per m2. Weight per m2 =7.85×4=31.4kg steel pipe (including seamless steel pipe and welded steel pipe) Calculation unit:kg/m Calculation formula:W=0.02466×S (D-S) Formula description:D= Outer diameter, S= wall thickness Calculation Example:For a seamless steel pipe with an outer diameter of 60mm and a wall thickness of 4mm, calculate the weight per m. Weight per m =0.02466×4× (60-4) =5.52kg