Pick sheet thickness from the standard series, blank size with allowances, nesting on commercial 1500×3000 and other formats, net-weight correction and PDF export.
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Часті запитання
How is sheet thickness selected?+
From the standard sheet thickness series: the smallest value covering the part nominal plus milling allowances.
What is nesting on a commercial 1500×3000 sheet?+
The calculator places blanks on a typical supplier sheet format, accounts for gaps between blanks, and shows parts per sheet and batch gross weight.
Can I export sheet norming to PDF?+
Yes — after calculation a PDF report with thickness, blank size, batch mass and UF is available for purchasing or the customer.
Norming parameters
Material selection for round bar, hexagon, forgings and sheet. For sheet — standard thicknesses, commercial sheet nesting and a PDF report.
Step 1. Finished part geometry (clean drawing dimensions)
After milling/grinding — used to synchronize the sheet thickness in step 3.
Step 2. Processing parameters and allowances
Added to the clean size on each side before selecting thickness and nesting: blank size = clean size + allowance×2.
Added to the clean thickness before selecting the sheet nominal: minimum = clean thickness + this allowance (removal from top/bottom).
Lets you calculate UF and chip weight accurately when the part has large holes, pockets or lightening cut-outs.
Step 3. Purchased material parameters (blank)
Minimum for the part: 10 mm (clean thickness + allowance). Only standard catalog thicknesses are available.
Affects batch weight, sheet nesting and UF.
Step 4. Commercial sheet parameters
Nesting is based on the cut-out size of one part (with allowance and gap), comparing 0° and 90° orientations.
Engineering report
Summary of material norming for the given batch
Required material area (gross)
0.1283 m² (128250 mm²)
Structural steel (7.85 g/cm³) · Rectangular · Allowance: 5 mm/side · t allowance: 2 mm · Blank: 130×90 mm + gap 5 mm → cut-out 135×95 mm · sheet t = 10 mm · clean t = 8 mm (min. sheet 10 mm)
Commercial sheet nesting
Yield per sheet: 341 pcs
For your batch of 10 pcs you will need 1 full sheets/pieces of metal (1500 × 3000 mm)
Total blank weight per batch (gross)
10.07 kg
Material purchase mass for the entire batch
Clean weight of one finished part (net)
0.603 kg
Net: clean cuboid after milling/grinding
Chip / waste weight
4.04 kg
Includes sheet offcuts, removed thickness allowance and process gaps · 10.07 kg (gross) − 6.03 kg (net × pcs) = 4.04 kg waste
Utilization factor (UF)
59.88%
Medium UF — check the side allowance, gaps and the sheet thickness in stock.
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Calculation methodology and material consumption norming
The calculator selects the sheet thickness from the standard series, calculates the blank size with allowances, the nesting on a commercial format and the batch UF.
What the algorithm accounts for
Allowances: per side (contour) and in thickness — so that the blank contains the finished part after machining.
Nesting: number of parts on a commercial sheet taking the gaps between cut-outs into account; kerf/gap width protects against “eaten” material.
Net weight correction: for complex geometry or holes — a reduction percentage or the exact mass from CAD.
Mathematical basis of the calculation
The mass of a sheet blank is calculated as the volume of a cuboid or disk multiplied by density. UF compares the batch net weight with the gross purchase weight.
m [kg] = V [mm³] × ρ [g/cm³] / 10⁶
Reference density table
Material
ρ, g/cm³
Application
Structural steel
7.85
Sheet
Aluminum
2.7
Sheet
Brass / Bronze
8.5
Sheet
Formulas
Rectangular part / block
m = L × W × T × ρ / 10⁶
Circular part (disk)
m = (π × D² / 4) × T × ρ / 10⁶
Complex contour part
Net — from the model or manual input; gross — from the blank envelope (contour + allowances) × sheet thickness.
