Some common formulas for calculating the weight of metal materials:
Theoretic Unit Weight of Carbon steel Pipe (kg) = 0.0246615 x wall thickness x (outside diameter - wall thickness) x length
Round steel weight (kg) = 0.00617 x diameter x diameter x length
Square steel weight (kg) = 0.00785 x side width x side width x length
Hexagonal steel weight (kg) = 0.0068 x opposite side width x opposite side width x length
Octagonal steel weight (kg) = 0.0065 x opposite side width x opposite side width x length
Rebar weight (kg) = 0.00617 x calculated diameter x calculated diameter x length
Angle weight (kg) = 0.00785 x (side width + side width - side thickness) x side thickness x length
Flat steel weight (kg) = 0.00785 x thickness x side width x length
Steel plate weight (kg) = 7.85 x thickness x area
Round brass bar weight (kg) = 0.00698 x diameter x diameter x length
Round brass bar weight (kg) = 0.00668 x diameter x diameter x length
Round aluminum bar weight (kg) = 0.0022 x diameter x diameter x length
Square brass bar weight (kg) = 0.0089 x side width x side width x length
Square brass bar weight (kg) = 0.0085 x side width x side width x length
Square aluminum bar weight (kg) = 0.0028 x side width x side width x length
Hexagonal purple brass bar weight (kg) = 0.0077 x opposite side width x opposite side width x length
Hexagonal brass bar weight (kg) = 0.00736 x side width x opposite side width x length
Hexagonal aluminum bar weight (kg) = 0.00242 x opposite side width x opposite side width x length
Copper plate weight (kg) = 0.0089 x thickness x width x length
Brass plate weight (kg) = 0.0085 x thickness x width x length
Aluminum plate weight (kg) = 0.00171 x thickness x width x length
Weight of round purple brass tube (kg) = 0.028 x wall thickness x (outer diameter - wall thickness) x length
Round brass tube weight (kg) = 0.0267 x wall thickness x (outer diameter - wall thickness) x length
Round aluminum tube weight (kg) = 0.00879 x wall thickness x (OD - wall thickness) x length
Note: The unit of length in the formula is meter, the unit of area is square meter, and the rest of the units are millimeters. The above weight x unit price of material is the material cost, plus surface treatment + man-hour cost of each process + packaging materials + shipping fee + tax + interest rate = quotation (FOB).
Specific gravity of commonly used materials
Iron = 7.85 Aluminum = 2.7 Copper = 8.95 Stainless steel = 7.93
Stainless steel weight simple calculation formula
Stainless steel flat weight per square meter (kg) formula: 7.93 x thickness (mm) x width (mm) x length (m)
304, 321 Stainless Steel Pipe Theoretic Unit weight per meter (kg) formula: 0.02491 x wall thickness (mm) x (outside diameter - wall thickness) (mm)
316L, 310S Stainless Steel Pipe Theoretic Unit weight per meter (kg) formula: 0.02495 x wall thickness (mm) x (outer diameter - wall thickness) (mm)
Stainless round steel weight per meter (kg) formula: diameter (mm) x diameter (mm) x (nickel stainless: 0.00623; chromium stainless: 0.00609)
Theoretical weight calculation of steel
Theoretical weight calculation of steel is measured in kilograms (kg). Its basic formula is:
W (weight, kg) = F (cross-sectional area mm²) x L (length m) x ρ (density g/cm³) x 1/1000
Various steel theoretical weight formula is as follows:
Round steel, Coil (kg/m)
W=0.006165 x d x d
d = diameter mm
Diameter 100mm round steel, find the weight per m. Weight per m = 0.006165 x 100² = 61.65kg
Rebar (kg/m)
W=0.00617 x d x d
d = section diameter mm
Find the weight per m of a rebar with a section diameter of 12mm. Weight per m = 0.00617 x 12² = 0.89kg
Square steel (kg/m)
W=0.00785 x a x a
a = side width mm
Find the weight per m of a square steel with a side width of 20mm. Weight per m = 0.00785 x 20² = 3.14kg
Flat steel (kg/m)
W=0.00785×b×d
b = side width mm
d=thickness mm
For a flat steel with a side width of 40mm and a thickness of 5mm, find the weight per meter. Weight per m = 0.00785 × 40 × 5 = 1.57kg
Hexagonal steel (kg/m)
W=0.006798×s×s
s=distance from opposite side mm
Find the weight per m of a hexagonal steel with a distance of 50mm from the opposite side. Weight per m = 0.006798 × 502 = 17kg
Octagonal steel (kg/m)
W=0.0065×s×s
s=distance to side mm
Find the weight per m of an octagonal steel with a distance of 80mm from the opposite side. Weight per m = 0.0065 × 802 = 41.62kg
Equilateral angle steel (kg/m)
W = 0.00785 × [d (2b-d ) + 0.215 (R²-2r² )]
b = side width
d = edge thickness
R = inner arc radius
r = radius of end arc
Find the weight per m of 20 mm x 4 mm equilateral angle. From the Metallurgical Catalog, the R of a 4mm x 20mm equal-edge angle is 3.5 and the r is 1.2, then the weight per m = 0.00785 x [4 x (2 x 20-4) + 0.215 x (3.52 - 2 x 1.2² )] = 1.15kg
Unequal angle (kg/m)
W=0.00785×[d(B+b-d ) +0.215(R²-2r²)]
B=long side width
b=short side width
d=Side thickness
R=inner arc radius
r=end arc radius
Find the weight per m of 30 mm × 20 mm × 4 mm unequal angle. From the metallurgical catalog to find 30 × 20 × 4 unequal angles of R is 3.5, 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
Channel steel (kg/m)
W = 0.00785 × [hd + 2t (b-d) + 0.349 (R²-r² )]
h=height
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. From a metallurgical catalog the channel has a t of 8 , an R of 8 and an r of 4. Weight per m = 0.00785 × [80 × 5 + 2 × 8 × (43 - 5) + 0.349 × (82 - 4²)] = 8.04kg
I-beam (kg/m)
W=0.00785×[hd+2t(b-d)+0.615(R²-r²)
h=height
b=leg length
d=waist thickness
t=average leg thickness
r=inner arc radius
r=end arc radius
Find the weight per m of an I-beam of 250 mm × 118 mm × 10 mm. From the metal materials handbook the I-beam has a t of 13, an R of 10 and an r of 5. Weight per m = 0.00785 x [250 x 10 + 2 x 13 x (118 - 10) + 0.615 x (10² - 5² )] = 42.03kg
Steel plate (kg/m²)
W=7.85×d
d=thickness
Find the weight per m² of a steel plate of thickness 4mm. Weight per m² = 7.85 x 4 = 31.4kg
Steel pipe (including seamless and welded steel pipe) (kg/m)
W=0.0246615×S (D-S)
D=outside diameter
S = wall thickness
Find the weight per m of a seamless steel pipe with an outside diameter of 60mm and a wall thickness of 4mm. Weight per m = 0.0246615 × 4 × (60-4) = 5.52kg
Post time: Oct-08-2023