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For the calculation procedure, go through the following steps.👇
Let us consider a hollow mild steel square section ( tube or pipe) of dimension 50mm × 50mm.× 2mm. as shown in the drawing below. Let us take a pipe of 1meter length.
 |
| Hollow mild steel square section |
Given data:
Thickness = T = 2mm.
Breadth = B = 50mm
Length = L =1m.
 |
| Hollow steel square tube. |
First, we will calculate the sectional area in two parts, the orange-colored part area as A1, and green colored part area as A2.
Area A2 =[ { B - ( 2 × T )} × T × 2 nos]
= [{50 mm. - ( 2 × 2mm. )} × 2mm. × 2 nos]
=[ 46 mm. × 2mm. × 2nos.]
= [0.046 × 0.002 × 2]
A2 = 0.000184 m²
Now, the total sectional area
A = [ A1 +A2]
= [0.0002 +0.000184]
= 0.000384 m²
As you know,
volume V = [ area × length ]
= [ A × L ]
= [ 0.000384 m² × 1m. ]
V = 0.000384 m³
The density of mild steel is 7850 kg./m³
So, the weight of the hollow square MS tube
= [volume × density]
= [0.000384 × 7850]
= 3.014 kg.
For you 👇
❤ Calculating the weight of mild steel plate - rectangular, square, and circular.
Alternate method:
First, we will calculate the total area inclusive of the hollow part, and then we will deduct the pipe's inner hollow portion (shown in brown color).
Area a1 = [B × B]
= [50mm. × 50mm.]
By converting mm. unit into meters, we get
a1 = [0.05 × 0.05]
a1 = 0.0025 m²
Area a2 = [46mm.× 46 mm.]
( i.e. inner hollow part )
= [0.046 ×0.046]
a2 = 0.002116 m²
Now,
the total sectional area
A = [a1 - a2]
= [ 0.0025 - 0.002116]
A = 0.000384 m²
Note: We got the same area (A ) as calculated before.
Volume = [0.00384 m² × 1m.]
V = 0.000384 m³
So, the weight of the hollow square MS tube
= [volume × density]
= [0.000384 × 7850]
= 3.014 kg. ✔
PART 1👈 Back continued 👉 PART 3
Thank you for going through this calculation😃.
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