Calculating Super Duplex Stainless Steel weight helps estimate material requirements, transportation needs, handling requirements, and project costs. The theoretical weight of a plate depends mainly on its length, width, thickness, and material density.
For Super Duplex 2507, also identified as UNS S32750 and EN 1.4410, a representative density of 7.8 g/cm³ can be used for theoretical weight calculations. Actual supplied weight may differ because of dimensional tolerances, cutting, processing, and the final weighing method.
Why Is Super Duplex Stainless Steel Weight Calculation Important?
Material Quantity Estimation
Weight calculations help estimate the total quantity of Super Duplex Stainless Steel required for a project. They are particularly useful when purchasing plates, sheets, bars, pipes, and other product forms.
Transportation and Handling
Knowing the approximate weight helps with vehicle selection, lifting equipment, loading arrangements, and unloading requirements.
Project Costing
Material prices are often quoted on a weight basis. Calculating the theoretical weight provides an initial estimate of the material cost before receiving a supplier quotation.
Price Per Kilogram Calculation
Once the estimated weight is known, it can be multiplied by the applicable price per kilogram to calculate an approximate material cost.
What Information Is Needed to Calculate Super Duplex Stainless Steel Weight?
The following information is normally required:
- Material grade
- Product form
- Thickness or diameter
- Width
- Length
- Quantity
- Material density
For Super Duplex 2507, the density is listed as 7.8 g/cm³ in Alleima’s SAF™ 2507 material data. The value can be used for theoretical calculations, while the applicable material specification or supplier data should be checked for commercial calculations.
How to Calculate Super Duplex Plate Weight?
Basic Weight Formula
The basic calculation is:
Weight = Volume × Density
For a rectangular plate:
Volume = Length × Width × Thickness
When all dimensions are in millimetres and density is expressed in g/cm³, the following formula can be used:
Weight (kg) = Length (mm) × Width (mm) × Thickness (mm) × Density (g/cm³) ÷ 1,000,000
For Super Duplex 2507, using a density of 7.8 g/cm³:
Weight (kg) = Length × Width × Thickness × 7.8 ÷ 1,000,000
This gives the theoretical weight of a rectangular plate.
How Does Thickness Affect Super Duplex Stainless Steel Weight?
For a plate with the same length, width, and density, weight increases directly with thickness.
3 mm Super Duplex Plate
At a density of 7.8 g/cm³, a 3 mm plate has a theoretical weight of:
3 × 7.8 = 23.4 kg/m²
6 mm Super Duplex Plate
A 6 mm plate weighs:
6 × 7.8 = 46.8 kg/m²
This is twice the theoretical weight per square metre of a 3 mm plate.
10 mm Super Duplex Plate
A 10 mm plate weighs:
10 × 7.8 = 78.0 kg/m²
12 mm Super Duplex Plate
A 12 mm plate weighs:
12 × 7.8 = 93.6 kg/m²
20 mm Super Duplex Plate
A 20 mm plate weighs:
20 × 7.8 = 156.0 kg/m²
These values are theoretical calculations based on a density of 7.8 g/cm³ and should not be treated as guaranteed shipment weights.
Super Duplex Stainless Steel Weight: Thickness vs Weight
| Thickness | Theoretical Weight per m² at 7.8 g/cm³ |
| 3 mm | 23.40 kg |
| 6 mm | 46.80 kg |
| 10 mm | 78.00 kg |
| 12 mm | 93.60 kg |
| 20 mm | 156.00 kg |
Super Duplex 2507 has a listed density of 7.8 g/cm³. The table therefore provides theoretical values for weight estimation rather than exact weights for every supplied plate.
How Do Plate Dimensions Affect Super Duplex Weight?
Length
If the width, thickness, and density remain unchanged, doubling the plate length doubles its theoretical weight.
Width
Width has the same proportional effect. A plate that is twice as wide will have approximately twice the theoretical weight when all other dimensions remain constant.
Thickness
Thickness has a direct relationship with weight. For a density of 7.8 g/cm³, every additional 1 mm of plate thickness adds approximately 7.8 kg/m².
Quantity
The total theoretical weight is calculated by multiplying the weight of one piece by the number of pieces.
For example:
Total Weight = Weight per Plate × Number of Plates
If one 6 mm × 1500 mm × 3000 mm plate has a theoretical weight of 210.6 kg, then 10 identical plates have a theoretical total weight of:
210.6 × 10 = 2,106 kg
How Can You Calculate the Weight of Other Super Duplex Products?
The same basic principle applies to other product forms:
Weight = Volume × Density
The volume calculation changes according to the product’s geometry.
Super Duplex Sheets and Plates
For rectangular sheets and plates:
Weight = Length × Width × Thickness × Density
The appropriate unit conversion must be applied according to the units used.
Super Duplex Round Bars
A round bar can be treated as a cylinder:
Volume = π × (Diameter ÷ 2)² × Length
The calculated volume is then multiplied by the material density to obtain the theoretical weight.
Super Duplex Pipes
For a hollow pipe:
Volume = π × Length × (Outer Radius² − Inner Radius²)
The resulting volume is multiplied by the material density.
Super Duplex Coils and Strips
For flat coil or strip products, the theoretical volume can be calculated from:
Length × Width × Thickness
The material density is then applied to obtain the theoretical weight.
The actual product dimensions, tolerances, and applicable product standard should be considered when calculating a purchase quantity.
What Is the Difference Between Theoretical and Actual Weight?
Theoretical weight is calculated from nominal dimensions and the assumed or specified material density.
Actual weight is the weight of the finished product measured after manufacturing or processing.
The two values can differ because of:
- Thickness tolerances
- Width and length tolerances
- Cutting and trimming
- Surface preparation
- Machining or other processing
- Product geometry
- Manufacturing tolerances
- Final weighing conditions
For purchasing and shipment documentation, the supplier’s applicable measurement and weighing method should be followed.
How Does Weight Affect Super Duplex Stainless Steel Price?
Price Per Kilogram
If Super Duplex Stainless Steel is quoted on a per-kilogram basis, the estimated material cost can be calculated as:
Estimated Material Cost = Theoretical or Chargeable Weight × Price per kg
The final commercial price can differ depending on the grade, product form, dimensions, specification, testing, quantity, processing, and supplier terms.
Grade and Specification
Super Duplex Stainless Steel products may be supplied to different standards and specifications. For Super Duplex 2507, common designations include UNS S32750 and EN 1.4410. Product standards vary by form, so the applicable specification should be confirmed before ordering.
Order Quantity
Total order weight affects the overall material value. Suppliers may also quote different rates depending on quantity, product availability, processing requirements, and order specifications.
What Should You Check Before Using a Weight Calculation?
- Correct material grade
- Actual density
- Nominal or measured dimensions
- Unit conversions
- Number of pieces
- Cutting allowances
- Thickness tolerances
- Theoretical versus actual weight
- Supplier’s final weighing method
Conclusion
Calculating the weight of Super Duplex Stainless Steel starts with the correct grade, dimensions, thickness, and density. Theoretical figures guide material quantity, freight and cost. The supplier’s measurement or weighing records set the final shipment weight.