FieldEngineersKitEngineering Reference & ASME Code Basis
1. Formula & conversion factors
ASTM / EN product standards (density reference — screening only) · ASME B36.10M / B36.19M (pipe OD & wall geometry when entered manually)
m = ρ × V · Plate/rect: V = L × W × t · Round bar: V = (π/4) D² L
Pipe/tube: V = (π/4)(OD² − ID²)L with ID = OD − 2t
Catalog densities for SS / Duplex / Nickel alloy procurement screening
This calculator screens piece and total mass from catalog densities for stainless, duplex, nickel alloys, and common comparison metals. SS304 uses 7.93 g/cm³ and SS316 uses 8.00 g/cm³ so the density delta is visible for MTO. Optional unit price estimates material cost. Mill certificates govern contractual mass.
- ρ (Density) — Catalog mass density (kg/m³). Also shown as g/cm³ and lb/in³.
- V (Volume) — Solid or annular volume from the selected shape dimensions.
- m (Mass) — Piece or total weight (kg / lb) after quantity.
2. Quick reference lookup table
| Material | kg/m³ | g/cm³ | lb/in³ | Family |
|---|---|---|---|---|
| SS304 / 304L | 7930 | 7.93 | 0.286 | Stainless |
| SS316 / 316L | 8000 | 8.00 | 0.289 | Stainless |
| SS321 | 8020 | 8.02 | 0.290 | Stainless |
| Duplex 2205 (S31803) | 7800 | 7.80 | 0.282 | Duplex |
| Super Duplex 2507 | 7800 | 7.80 | 0.282 | Duplex |
| Inconel 625 | 8440 | 8.44 | 0.305 | Nickel |
| Hastelloy C-276 | 8890 | 8.89 | 0.321 | Nickel |
| Monel 400 | 8830 | 8.83 | 0.319 | Nickel |
| Carbon steel | 7850 | 7.85 | 0.284 | Other |
| Titanium Gr. 2 | 4510 | 4.51 | 0.163 | Other |
3. How to use this calculator
- 1
Select material
Filter or pick SS304/316, Duplex, Inconel, Hastelloy, Titanium, etc.
- 2
Choose shape
Plate, pipe/tube, round bar, rectangular bar, or structural screening.
- 3
Enter dimensions & quantity
Use navbar metric/imperial units. Add optional $/kg or $/lb for cost.
- 4
Read weight & export
Copy or export total mass for MTO / freight. Confirm ρ on the mill cert for PO mass.
4. Engineering FAQ
This tool uses 7.93 g/cm³ for SS304 and 8.00 g/cm³ for SS316/316L — about 0.9% denser for 316 at the same volume.
No. Use this tool for stainless / duplex / nickel alloy density screens and plate/pipe/bar mass. Use Metal Weight & Cost when you need NPS×schedule pipe fill and broader construction metals.
They are catalog screening values. Heat chemistry and product form can shift ρ slightly — use the mill certificate for contractual shipping mass.