Copper C11000 Rectangular Tube Weight
Mass per metre and per foot for copper c11000 rectangular tube at 8,940 kg/m³ (ASTM B152 / B187 (UNS C11000, ETP)). Every figure is for the section as drawn. A 6 m length of this size weighs 30.3 kg (67.8 lb per 20 ft).
At the reference dimensions (a = 60 mm, b = 40 mm, t = 3 mm) this section has a cross-sectional area of 564.0 mm², giving 5.042 kg/m (3.388 lb/ft). Against carbon steel's 7,850 kg/m³ that is +13.9 % — the same section in steel would be 4.427 kg/m.
Rectangular Tube — formula and derivation
Area of a rectangular tube
A = a·b − (a − 2t)(b − 2t)
A = a·b − (a − 2t)(b − 2t), which expands to A = 2t(a + b) − 4t²
Worked through with the default dimensions:
A = a·b − (a − 2t)(b − 2t)Outer = 60 × 40 = 2400.0 mm²Inner = 54.0 × 34.0 = 1836.0 mm²A = 2400.0 − 1836.0A = 564.0 mm²
- a
- Depth
- b
- Width
- t
- Wall thickness
Weight follows from the area with no further geometry: m = A × 10⁻⁶ × ρ, where A is in mm², ρ in kg/m³ and m in kg/m. At 8,940 kg/m³ that is 5.0422 kg/m for the reference size above.
Copper rectangular tube — size series
| Depth | 1.5 | 2.0 | 3.0 | 4.0 | 5.0 | 6.0 |
|---|---|---|---|---|---|---|
| 20 mm | 0.724 kg/m · 0.487 lb/ft | 0.930 kg/m · 0.625 lb/ft | 1.287 kg/m · 0.865 lb/ft | 1.573 kg/m · 1.057 lb/ft | 1.788 kg/m · 1.201 lb/ft | 1.931 kg/m · 1.298 lb/ft |
| 25 mm | 0.925 kg/m · 0.622 lb/ft | 1.198 kg/m · 0.805 lb/ft | 1.690 kg/m · 1.135 lb/ft | 2.110 kg/m · 1.418 lb/ft | 2.458 kg/m · 1.652 lb/ft | 2.736 kg/m · 1.838 lb/ft |
| 30 mm | 1.126 kg/m · 0.757 lb/ft | 1.466 kg/m · 0.985 lb/ft | 2.092 kg/m · 1.406 lb/ft | 2.646 kg/m · 1.778 lb/ft | 3.129 kg/m · 2.103 lb/ft | 3.540 kg/m · 2.379 lb/ft |
| 40 mm | 1.529 kg/m · 1.027 lb/ft | 2.003 kg/m · 1.346 lb/ft | 2.897 kg/m · 1.946 lb/ft | 3.719 kg/m · 2.499 lb/ft | 4.470 kg/m · 3.004 lb/ft | 5.149 kg/m · 3.460 lb/ft |
| 50 mm | 1.931 kg/m · 1.298 lb/ft | 2.539 kg/m · 1.706 lb/ft | 3.701 kg/m · 2.487 lb/ft | 4.792 kg/m · 3.220 lb/ft | 5.811 kg/m · 3.905 lb/ft | 6.759 kg/m · 4.542 lb/ft |
| 60 mm | 2.333 kg/m · 1.568 lb/ft | 3.075 kg/m · 2.067 lb/ft | 4.506 kg/m · 3.028 lb/ft | 5.865 kg/m · 3.941 lb/ft | 7.152 kg/m · 4.806 lb/ft | 8.368 kg/m · 5.623 lb/ft |
| 80 mm | 3.138 kg/m · 2.109 lb/ft | 4.148 kg/m · 2.787 lb/ft | 6.115 kg/m · 4.109 lb/ft | 8.010 kg/m · 5.383 lb/ft | 9.834 kg/m · 6.608 lb/ft | 11.586 kg/m · 7.786 lb/ft |
| 100 mm | 3.943 kg/m · 2.649 lb/ft | 5.221 kg/m · 3.508 lb/ft | 7.724 kg/m · 5.190 lb/ft | 10.156 kg/m · 6.824 lb/ft | 12.516 kg/m · 8.410 lb/ft | 14.805 kg/m · 9.948 lb/ft |
| 120 mm | 4.747 kg/m · 3.190 lb/ft | 6.294 kg/m · 4.229 lb/ft | 9.333 kg/m · 6.272 lb/ft | 12.301 kg/m · 8.266 lb/ft | 15.198 kg/m · 10.213 lb/ft | 18.023 kg/m · 12.111 lb/ft |
| 150 mm | 5.954 kg/m · 4.001 lb/ft | 7.903 kg/m · 5.311 lb/ft | 11.747 kg/m · 7.894 lb/ft | 15.520 kg/m · 10.429 lb/ft | 19.221 kg/m · 12.916 lb/ft | 22.851 kg/m · 15.355 lb/ft |
| 200 mm | 7.966 kg/m · 5.353 lb/ft | 10.585 kg/m · 7.113 lb/ft | 15.770 kg/m · 10.597 lb/ft | 20.884 kg/m · 14.033 lb/ft | 25.926 kg/m · 17.421 lb/ft | 30.897 kg/m · 20.762 lb/ft |
Rows: depth (mm). Columns: wall thickness (mm). Computed for Copper C11000 at 8940 kg/m³.
| Depth | 1.5 | 2.0 | 3.0 | 4.0 | 5.0 | 6.0 |
|---|---|---|---|---|---|---|
| 20 mm | 81.0 | 104.0 | 144.0 | 176.0 | 200.0 | 216.0 |
| 25 mm | 103.5 | 134.0 | 189.0 | 236.0 | 275.0 | 306.0 |
| 30 mm | 126.0 | 164.0 | 234.0 | 296.0 | 350.0 | 396.0 |
| 40 mm | 171.0 | 224.0 | 324.0 | 416.0 | 500.0 | 576.0 |
| 50 mm | 216.0 | 284.0 | 414.0 | 536.0 | 650.0 | 756.0 |
| 60 mm | 261.0 | 344.0 | 504.0 | 656.0 | 800.0 | 936.0 |
| 80 mm | 351.0 | 464.0 | 684.0 | 896.0 | 1,100.0 | 1,296.0 |
| 100 mm | 441.0 | 584.0 | 864.0 | 1,136.0 | 1,400.0 | 1,656.0 |
| 120 mm | 531.0 | 704.0 | 1,044.0 | 1,376.0 | 1,700.0 | 2,016.0 |
| 150 mm | 666.0 | 884.0 | 1,314.0 | 1,736.0 | 2,150.0 | 2,556.0 |
| 200 mm | 891.0 | 1,184.0 | 1,764.0 | 2,336.0 | 2,900.0 | 3,456.0 |
Area is a property of the geometry alone, so this table is the same for every material. It is what you enter into a stress calculation; the mass table is what you enter into an order.
Each row is one nominal size. Because the area is computed from your dimensions rather than read from a mill table, a non-standard size is just as accurate — put it into the calculator above rather than interpolating between rows.
The same rectangular tube in every material
Geometry is fixed and only density changes, so this table is the whole material-selection question in one view. Copper C11000 is highlighted. The percentage column is against carbon steel, which is the figure most quotations are built on.
| Material | Density kg/m³ | lb/in³ | Mass / length kg/m | lb/ft | vs carbon steel |
|---|---|---|---|---|---|
| Carbon Steel | 7,850 | 0.2836 | 4.427 | 2.975 | +0.0 % |
| Stainless Steel 304 | 8,000 | 0.2890 | 4.512 | 3.032 | +1.9 % |
| Stainless Steel 316 | 8,000 | 0.2890 | 4.512 | 3.032 | +1.9 % |
| Stainless Steel 316L | 8,000 | 0.2890 | 4.512 | 3.032 | +1.9 % |
| Stainless Steel 430 | 7,700 | 0.2782 | 4.343 | 2.918 | -1.9 % |
| Aluminum 6061-T6 | 2,700 | 0.0975 | 1.523 | 1.023 | -65.6 % |
| Aluminum 5052-H32 | 2,680 | 0.0968 | 1.512 | 1.016 | -65.9 % |
| Aluminum 7075-T6 | 2,810 | 0.1015 | 1.585 | 1.065 | -64.2 % |
| Copper C11000 | 8,940 | 0.3230 | 5.042 | 3.388 | +13.9 % |
| Brass C36000 | 8,500 | 0.3071 | 4.794 | 3.221 | +8.3 % |
| Bronze C93200 | 8,800 | 0.3179 | 4.963 | 3.335 | +12.1 % |
| Titanium Grade 2 | 4,510 | 0.1629 | 2.544 | 1.709 | -42.5 % |
| Gray Cast Iron | 7,200 | 0.2601 | 4.061 | 2.729 | -8.3 % |
| Lead | 11,340 | 0.4097 | 6.396 | 4.298 | +44.5 % |
| Rigid PVC (Type I) | 1,400 | 0.0506 | 0.790 | 0.531 | -82.2 % |
| HDPE (PE 100) | 960 | 0.0347 | 0.541 | 0.364 | -87.8 % |
Same geometry throughout, so the only variable is density. Carbon steel is highlighted as the baseline.
A note on using this table for costing: mass is not price. Aluminium is roughly a third of steel's mass here, but per kilogram it costs several times more, so a straight swap rarely saves money — what it buys is reduced load on a structure or a vehicle.
About copper c11000
Electrolytic tough pitch copper, 99.9 % Cu minimum — the electrical conductor standard, and the densest material here after lead at 8,940 kg/m³. That density is the point: high conductivity and high mass travel together in copper, which is why busbar and winding take-offs are always done by mass. It is 13.9 % heavier than carbon steel, so a copper busbar replacing a steel one of the same section gains weight while gaining conductivity.
- Density
- 8,940 kg/m³ = 0.3230 lb/in³ · 1.1389× carbon steel · typical spread ±1 %
- Specification
- ASTM B152 / B187 (UNS C11000, ETP)
- Equivalents
- EN CW004A · JIS C1100 · GB T2
- Typical uses
- Busbar and windings · Plumbing tube · Heat exchangers · Roofing and flashing
About rectangular tube
Rectangular tube is the shape to reach for when a beam has to be shallower than it is wide in one direction only. Because depth drives bending stiffness far more than width does, taking a rectangular section and turning it 90° changes the stiffness dramatically while the weight stays identical — a 100 × 50 × 4 tube is about 4 times stiffer about its strong axis than its weak axis, at 9.10 kg/m either way. The table here holds the common 2:1 depth-to-width proportion; enter your own dimensions in the calculator when the section is not 2:1.
Specified as depth × width × wall thickness. Confirm which dimension is the depth on a drawing before computing loads.
Download this data
Copper rectangular tube — CSV
Both buttons below read the tables rendered on this page, so the file matches what you are looking at. The full catalogue — all 16 materials across all 10 sections — is on the downloads page.
Fields are quoted per RFC 4180, with a UTF-8 byte-order mark so Excel reads the mm² and · characters correctly. Blank lines separate the weight matrix from the area matrix.
Frequently asked questions
How much does copper c11000 rectangular tube weigh?
At the reference dimensions (a = 60 mm, b = 40 mm, t = 3 mm) a copper c11000 rectangular tube of this size weighs 5.042 kg/m, or 3.388 lb/ft. The table above lists the figure for every standard size so you can read your size directly instead of scaling.
How is the weight of rectangular tube calculated?
Weight is cross-sectional area × length × density. For this shape the area is A = a·b − (a − 2t)(b − 2t). At the reference dimensions that gives 564.0 mm², and multiplying by copper c11000's density of 8,940 kg/m³ gives 5.042 kg/m. Nothing is looked up in a table — which is why a non-standard size is calculated just as accurately as a standard one.
Why does copper c11000 weigh more or less than steel?
It is heavier than carbon steel for the same section — about 14 % heavier at 8,940 kg/m³. Density is the only variable: the cross-sectional area depends purely on geometry, so a rectangular tube of the same dimensions has the same area in every material and the mass simply scales with density. In this case the ratio is 1.1389× carbon steel.
What is the cross-sectional area of a rectangular tube?
The area depends only on the dimensions, not on the material, so it is identical whichever material you select: at the reference dimensions it is 564.0 mm² (0.8742 in²). That is the number you would enter into a stress or deflection calculation, and it is why changing material on this page never changes the area column.
Does a copper rectangular tube weigh the same as a copper part of a different shape?
No, and the difference is larger than most people expect. At equal nominal size, a square bar is 27.3 % heavier than a round bar, and a hollow section is typically 60–80 % lighter than the solid bar it replaces. Weight follows area, and area changes faster than dimensions do — which is exactly why this needs calculating rather than estimating.
Should I use Copper weight or carbon steel weight for costing?
Use the material you are actually buying. At 8,940 kg/m³ against carbon steel's 7,850 kg/m³, the same rectangular tube differs by 13.9 % in mass. On a per-metre quote that is invisible; on a fabricated tonnage it is the difference between a margin and a loss. This page computes the steel figure as 4.427 kg/m for comparison.
Other materials, same rectangular tube
The same geometry in every material, so the only variable is density.
- Carbon steel rectangular tube — 7850 kg/m³
- SS 304 rectangular tube — 8000 kg/m³
- SS 316 rectangular tube — 8000 kg/m³
- AL 6061 rectangular tube — 2700 kg/m³
- Brass rectangular tube — 8500 kg/m³
- HDPE rectangular tube — 960 kg/m³
- PVC rectangular tube — 1400 kg/m³
- AL 5052 rectangular tube — 2680 kg/m³
Other Copper sections
The same density applied to every shape the site covers.
- Copper round bar — A = π/4 · d²
- Copper square bar — A = a²
- Copper hexagonal bar — A = (√3/2) · AF² ≈ 0.8660 · AF²
- Copper flat bar — A = w · t
- Copper plate — A = w · t
- Copper round tube — A = π/4 · (D² − d²), d = D − 2t
Reference data and tools
- Metal weight overview — how the calculation works
- All 16 materials — densities and specifications
- All 10 sections — formulas and size series
- Density chart — lightest to heaviest
- Metal weight calculator — any size, any material
- All calculators — metal weight and pipe weight
- Download the data — CSV, generated from the same source
- Cross-reference tables — DN / NPS / material equivalents
- Methodology and sources — where every number comes from
Rectangular Tube area from A = a·b − (a − 2t)(b − 2t). Mass computed as area × length × density at 8,940 kg/m³ (ASTM B152 / B187 (UNS C11000, ETP)). No weight on this page is copied from a published table — which is why figures can differ in the last significant digit from a mill's chart calculated at a nominal density.
- Elementary plane geometry. The circle, polygon and hollow-section area formulas.
- ASTM material specifications for each grade named in the material entry (A36, A240/A276, B209/B211/B221, B152/B16/B505, B265/B348, A48, B29, D1784, D3350).
- BIPM / NIST definitional constants: international inch = 25.4 mm, foot = 0.3048 m, pound = 0.45359237 kg.
Dataset version 2026.09.1 · dimensions last verified against source 2026-09-21. Found an error? Report it — corrections are issued with a version bump.