Theoretical Weight Calculation Formulas

304 Stainless Steel Square Tube

The weight of a 304 stainless steel square tube can be calculated using the formula: $Width×4/3.14−Thickness)×Thickness×0.02491\text{Weight (kg)} = (\text{Edge Width} \times 4 / 3.14 – \text{Thickness}) \times \text{Thickness} \times 0.02491$

Density Values:

7.93 for: 201, 202, 301, 302, 304, 304L, 305, 321
7.75 for: 405, 410, 420
7.98 for: 309S, 310S, 316, 316L, 347

Stainless Steel Bar and Wire

For 410, 420, 420J2, 430, 431: $(kg/m)=Diameter2×0.00609\text{Weight (kg/m)} = \text{Diameter}^2 \times 0.00609$ Example: Diameter 50mm $50 \times 50 \times 0.00609 = 15.23 \text{ kg/m}$

For 301, 303, 304, 316, 316L, 321: $(kg/m)=Diameter2×0.00623\text{Weight (kg/m)} = \text{Diameter}^2 \times 0.00623$ Example: Diameter 50mm $50 \times 50 \times 0.00623 = 15.575 \text{ kg/m}$

Stainless Steel Profiles

Hexagonal Bar: $Side)2×0.0069\text{Weight (kg/m)} = (\text{Opposite Side})^2 \times 0.0069$

Square Bar: $Width)2×0.00793\text{Weight (kg/m)} = (\text{Side Width})^2 \times 0.00793$

Stainless Steel Pipe

The weight of a stainless steel pipe can be calculated using the formula: $Thickness×0.02491\text{Weight (kg/m)} = (\text{Outer Diameter} – \text{Wall Thickness}) \times \text{Wall Thickness} \times 0.02491$ Example: Diameter 57mm, Wall Thickness 3.5mm $\times 3.5 \times 0.02491 = 4.66 \text{ kg/m}$

Oxygen-Free Annealed Wire

$Diameter)2\text{Weight per meter (kg)} = 0.00617 \times (\text{Wire Diameter})^2$

Metal Weight Calculation Formulas

Iron Wire: $(kg)=(Diameter)2×0.00617×Length1000\text{Weight (kg)} = \frac{(\text{Diameter})^2 \times 0.00617 \times \text{Length}}{1000}$

Iron Plate: $(kg)=Thickness×Width×Length×0.007851000\text{Weight (kg)} = \frac{\text{Thickness} \times \text{Width} \times \text{Length} \times 0.00785}{1000}$

Round Tube: $Diameter−Thickness)×Thickness×Length×0.024661000\text{Weight (kg)} = \frac{(\text{Outer Diameter} – \text{Thickness}) \times \text{Thickness} \times \text{Length} \times 0.02466}{1000}$

Rectangular Tube: $Side)×2/3.1416−Thickness]×Thickness×Length×0.024661000\text{Weight (kg)} = \frac{[(\text{Long Side} + \text{Short Side}) \times 2 / 3.1416 – \text{Thickness}] \times \text{Thickness} \times \text{Length} \times 0.02466}{1000}$

Square Tube: $Length×4/3.1416−Thickness)×Thickness×Length×0.024661000\text{Weight (kg)} = \frac{(\text{Side Length} \times 4 / 3.1416 – \text{Thickness}) \times \text{Thickness} \times \text{Length} \times 0.02466}{1000}$

Additional Metal Calculations

Angle Steel: $Width−Thickness)×Thickness\text{Weight per meter (kg)} = 0.00785 \times (\text{Side Width} + \text{Side Width} – \text{Thickness}) \times \text{Thickness}$

Round Steel and Rebar: $(kg)=0.00617×(Diameter)2\text{Weight per meter (kg)} = 0.00617 \times (\text{Diameter})^2$

Flat Steel: $Width\text{Weight per meter (kg)} = 0.00785 \times \text{Thickness} \times \text{Side Width}$

Pipe: $Thickness)\text{Weight per meter (kg)} = 0.02466 \times \text{Wall Thickness} \times (\text{Outer Diameter} – \text{Wall Thickness})$

Plate: $(kg)=7.85×Thickness\text{Weight per meter (kg)} = 7.85 \times \text{Thickness}$

Brass Tube: $Thickness)\text{Weight per meter (kg)} = 0.02670 \times \text{Wall Thickness} \times (\text{Outer Diameter} – \text{Wall Thickness})$

Copper Tube: $Thickness)\text{Weight per meter (kg)} = 0.02796 \times \text{Wall Thickness} \times (\text{Outer Diameter} – \text{Wall Thickness})$

Aluminum Patterned Plate: $(kg)=2.96×Thickness\text{Weight per square meter (kg)} = 2.96 \times \text{Thickness}$

Specific Gravity of Non-Ferrous Metals

Copper Plate: 8.9
Brass Plate: 8.5
Zinc Plate: 7.2
Lead Plate: 11.37

Non-Ferrous Metal Plate Calculation

$Gravity×Thickness\text{Weight per square meter (kg)} = \text{Specific Gravity} \times \text{Thickness}$

Example Calculation for Aluminum Plate

Given:

Width: 1m
Length: 2m
Thickness: 1mm

Steps:

Calculate Volume: $m3\text{Volume (m}^3\text{)} = \text{Length} \times \text{Width} \times \text{Thickness} = 1 \times 2 \times 0.001 = 0.002 \text{ m}^3$
Calculate Mass: $kg\text{Mass (kg)} = \text{Volume} \times \text{Density} = 0.002 \times 2700 = 5.4 \text{ kg}$
Calculate Weight: $N\text{Weight (N)} = \text{Mass} \times 9.81 = 5.4 \times 9.81 = 53 \text{ N}$