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Stainless Steel Price Per Sheet
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The stainless steel price per sheet is primarily determined by weight rather than unit quantity. In international trade and engineering practice, stainless steel sheets, plates, and pipes are priced based on mass (kg or ton). Therefore, accurate weight calculation is essential for cost estimation, procurement, and quotation.
1. Stainless Steel Density
Density is the foundation of all weight calculations. Different grades have slightly different values:
| Grade | Density (g/cm³) | Density (kg/m³) |
|---|---|---|
| 304 Stainless Steel | 7.93 | 7930 |
| 316 Stainless Steel | 7.98 | 7980 |
| Duplex Stainless Steel | 7.80 | 7800 |
| Ferritic Stainless Steel | 7.70 | 7700 |
2. Stainless Steel Sheet Weight Formula
Simplified Industry Formula
The most widely used formula for fast quotation:
Weight (kg) = Length (m) × Width (m) × Thickness (mm) × 8
This formula is derived from the average density of stainless steel and is commonly used in commercial calculations.
Example
Length = 2 m
Width = 1 m
Thickness = 3 mm
Weight = 2 × 1 × 3 × 8 = 48 kg
3. Accurate Sheet Weight Formula
For precise engineering calculations:
Weight (kg) = Length (m) × Width (m) × Thickness (mm) × Density (g/cm³)
This method accounts for slight variations in material grade.
4. Stainless Steel Pipe Weight Formula
Simplified Formula (Per Meter)
Weight (kg/m) = (Outer Diameter − Wall Thickness) × Wall Thickness × 0.02466
This is the standard formula used in pipe procurement and estimation.
Accurate Formula
Weight (kg) = (π / 4) × (OD² − ID²) × Length × Density
Where:
OD = Outer Diameter
ID = Inner Diameter
Density ≈ 7.93 g/cm³
5. Sheet vs Pipe Weight Comparison
| Product Type | Parameters | Formula | Use Case |
|---|---|---|---|
| Sheet / Plate | Length, Width, Thickness | L × W × T × 8 | Quick quotation |
| Sheet (Precise) | + Density | L × W × T × Density | Engineering calculation |
| Pipe / Tube | OD, WT | (OD − WT) × WT × 0.02466 | Purchasing |
| Pipe (Precise) | OD, ID, Length | π/4 × (OD² − ID²) × L × Density | Design |
6. How Weight Affects Price Per Sheet
In global stainless steel markets:
Pricing is based on cost per ton
Final sheet price = Weight × Unit Price
Larger or thicker sheets result in higher total cost due to increased mass
Practical Insight
For the same material grade:
A 6 mm sheet weighs approximately three times more than a 2 mm sheet
Therefore, the price per sheet increases proportionally
7. Applications of Weight Calculation
These formulas are essential for:
Request for quotation (RFQ) preparation
Cost comparison across suppliers
Shipping and logistics planning
Inventory management
Engineering and fabrication design
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