Theoretical Weight Calculation Formulas

 

Theoretical Weight Calculation Formulas

304 Stainless Steel Square Tube

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

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: Weight (kg/m)=Diameter2×0.00609\text{Weight (kg/m)} = \text{Diameter}^2 \times 0.00609Weight (kg/m)=Diameter2×0.00609 Example: Diameter 50mm $50\times 50\times 0.00609=15.23\text{ kg/m}$

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

Stainless Steel Profiles

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

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

Stainless Steel Pipe

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

Oxygen-Free Annealed Wire

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

Metal Weight Calculation Formulas

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

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

Round Tube: Weight (kg)=(Outer 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}Weight (kg)=1000(Outer Diameter−Thickness)×Thickness×Length×0.02466​

Rectangular Tube: Weight (kg)=[(Long Side+Short 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}Weight (kg)=1000[(Long Side+Short Side)×2/3.1416−Thickness]×Thickness×Length×0.02466​

Square Tube: Weight (kg)=(Side 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}Weight (kg)=1000(Side Length×4/3.1416−Thickness)×Thickness×Length×0.02466​

Additional Metal Calculations

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

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

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

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

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

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

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

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

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

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

Example Calculation for Aluminum Plate

Given:

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

Steps:

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

Stainless Steel Plate Weight

For quick estimates:

• 3mm Plate: 23.4kg – 24kg per square meter
• 6mm Plate: 46.8kg – 48kg per square meter

Density can vary, typically between 7.8 and 8.0.

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