Aluminum 7075-T6 Angle (L Section) Weight
Mass per metre and per foot for aluminum 7075-t6 angle (l section) at 2,810 kg/m³ (ASTM B211 / B209 (T6 temper)). Every figure is for the section as drawn. A 6 m length of this size weighs 8.0 kg (17.9 lb per 20 ft).
At the reference dimensions (a = 50 mm, b = 50 mm, t = 5 mm) this section has a cross-sectional area of 475.0 mm², giving 1.335 kg/m (0.897 lb/ft). Against carbon steel's 7,850 kg/m³ that is -64.2 % — the same section in steel would be 3.729 kg/m.
Angle (L Section) — formula and derivation
Area of a angle (l section)
A = t · (a + b − t)
A = t × (a + b − t), where a and b are the two leg lengths and t the thickness. Equal-leg angles set a = b, giving A = t(2a − t)
Worked through with the default dimensions:
A = t × (a + b − t)A = 5 × (50 + 50 − 5)A = 5 × 95.0A = 475.0 mm²
- a
- Leg a
- b
- Leg b
- t
- 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 2,810 kg/m³ that is 1.3348 kg/m for the reference size above.
AL 7075 angle (l section) — size series
| Leg a | 3.0 | 4.0 | 5.0 | 6.0 | 8.0 | 10 | 12 | 15 |
|---|---|---|---|---|---|---|---|---|
| 20 mm | 0.312 kg/m · 0.210 lb/ft | 0.405 kg/m · 0.272 lb/ft | 0.492 kg/m · 0.330 lb/ft | 0.573 kg/m · 0.385 lb/ft | 0.719 kg/m · 0.483 lb/ft | 0.843 kg/m · 0.566 lb/ft | 0.944 kg/m · 0.634 lb/ft | 1.054 kg/m · 0.708 lb/ft |
| 25 mm | 0.396 kg/m · 0.266 lb/ft | 0.517 kg/m · 0.347 lb/ft | 0.632 kg/m · 0.425 lb/ft | 0.742 kg/m · 0.498 lb/ft | 0.944 kg/m · 0.634 lb/ft | 1.124 kg/m · 0.755 lb/ft | 1.281 kg/m · 0.861 lb/ft | 1.475 kg/m · 0.991 lb/ft |
| 30 mm | 0.481 kg/m · 0.323 lb/ft | 0.629 kg/m · 0.423 lb/ft | 0.773 kg/m · 0.519 lb/ft | 0.910 kg/m · 0.612 lb/ft | 1.169 kg/m · 0.786 lb/ft | 1.405 kg/m · 0.944 lb/ft | 1.619 kg/m · 1.088 lb/ft | 1.897 kg/m · 1.275 lb/ft |
| 40 mm | 0.649 kg/m · 0.436 lb/ft | 0.854 kg/m · 0.574 lb/ft | 1.054 kg/m · 0.708 lb/ft | 1.248 kg/m · 0.838 lb/ft | 1.619 kg/m · 1.088 lb/ft | 1.967 kg/m · 1.322 lb/ft | 2.293 kg/m · 1.541 lb/ft | 2.740 kg/m · 1.841 lb/ft |
| 50 mm | 0.818 kg/m · 0.549 lb/ft | 1.079 kg/m · 0.725 lb/ft | 1.335 kg/m · 0.897 lb/ft | 1.585 kg/m · 1.065 lb/ft | 2.068 kg/m · 1.390 lb/ft | 2.529 kg/m · 1.699 lb/ft | 2.967 kg/m · 1.994 lb/ft | 3.583 kg/m · 2.407 lb/ft |
| 60 mm | 0.986 kg/m · 0.663 lb/ft | 1.304 kg/m · 0.876 lb/ft | 1.616 kg/m · 1.086 lb/ft | 1.922 kg/m · 1.292 lb/ft | 2.518 kg/m · 1.692 lb/ft | 3.091 kg/m · 2.077 lb/ft | 3.642 kg/m · 2.447 lb/ft | 4.426 kg/m · 2.974 lb/ft |
| 70 mm | 1.155 kg/m · 0.776 lb/ft | 1.529 kg/m · 1.027 lb/ft | 1.897 kg/m · 1.275 lb/ft | 2.259 kg/m · 1.518 lb/ft | 2.967 kg/m · 1.994 lb/ft | 3.653 kg/m · 2.455 lb/ft | 4.316 kg/m · 2.900 lb/ft | 5.269 kg/m · 3.540 lb/ft |
| 80 mm | 1.324 kg/m · 0.889 lb/ft | 1.753 kg/m · 1.178 lb/ft | 2.178 kg/m · 1.463 lb/ft | 2.596 kg/m · 1.745 lb/ft | 3.417 kg/m · 2.296 lb/ft | 4.215 kg/m · 2.832 lb/ft | 4.991 kg/m · 3.354 lb/ft | 6.112 kg/m · 4.107 lb/ft |
| 90 mm | 1.492 kg/m · 1.003 lb/ft | 1.978 kg/m · 1.329 lb/ft | 2.459 kg/m · 1.652 lb/ft | 2.934 kg/m · 1.971 lb/ft | 3.867 kg/m · 2.598 lb/ft | 4.777 kg/m · 3.210 lb/ft | 5.665 kg/m · 3.807 lb/ft | 6.955 kg/m · 4.673 lb/ft |
| 100 mm | 1.661 kg/m · 1.116 lb/ft | 2.203 kg/m · 1.480 lb/ft | 2.740 kg/m · 1.841 lb/ft | 3.271 kg/m · 2.198 lb/ft | 4.316 kg/m · 2.900 lb/ft | 5.339 kg/m · 3.588 lb/ft | 6.339 kg/m · 4.260 lb/ft | 7.798 kg/m · 5.240 lb/ft |
| 120 mm | 1.998 kg/m · 1.343 lb/ft | 2.653 kg/m · 1.782 lb/ft | 3.302 kg/m · 2.219 lb/ft | 3.945 kg/m · 2.651 lb/ft | 5.215 kg/m · 3.505 lb/ft | 6.463 kg/m · 4.343 lb/ft | 7.688 kg/m · 5.166 lb/ft | 9.484 kg/m · 6.373 lb/ft |
| 150 mm | 2.504 kg/m · 1.682 lb/ft | 3.327 kg/m · 2.236 lb/ft | 4.145 kg/m · 2.785 lb/ft | 4.957 kg/m · 3.331 lb/ft | 6.564 kg/m · 4.411 lb/ft | 8.149 kg/m · 5.476 lb/ft | 9.711 kg/m · 6.526 lb/ft | 12.013 kg/m · 8.072 lb/ft |
Rows: leg a (mm). Columns: thickness (mm). Computed for Aluminum 7075-T6 at 2810 kg/m³.
| Leg a | 3.0 | 4.0 | 5.0 | 6.0 | 8.0 | 10 | 12 | 15 |
|---|---|---|---|---|---|---|---|---|
| 20 mm | 111.0 | 144.0 | 175.0 | 204.0 | 256.0 | 300.0 | 336.0 | 375.0 |
| 25 mm | 141.0 | 184.0 | 225.0 | 264.0 | 336.0 | 400.0 | 456.0 | 525.0 |
| 30 mm | 171.0 | 224.0 | 275.0 | 324.0 | 416.0 | 500.0 | 576.0 | 675.0 |
| 40 mm | 231.0 | 304.0 | 375.0 | 444.0 | 576.0 | 700.0 | 816.0 | 975.0 |
| 50 mm | 291.0 | 384.0 | 475.0 | 564.0 | 736.0 | 900.0 | 1,056.0 | 1,275.0 |
| 60 mm | 351.0 | 464.0 | 575.0 | 684.0 | 896.0 | 1,100.0 | 1,296.0 | 1,575.0 |
| 70 mm | 411.0 | 544.0 | 675.0 | 804.0 | 1,056.0 | 1,300.0 | 1,536.0 | 1,875.0 |
| 80 mm | 471.0 | 624.0 | 775.0 | 924.0 | 1,216.0 | 1,500.0 | 1,776.0 | 2,175.0 |
| 90 mm | 531.0 | 704.0 | 875.0 | 1,044.0 | 1,376.0 | 1,700.0 | 2,016.0 | 2,475.0 |
| 100 mm | 591.0 | 784.0 | 975.0 | 1,164.0 | 1,536.0 | 1,900.0 | 2,256.0 | 2,775.0 |
| 120 mm | 711.0 | 944.0 | 1,175.0 | 1,404.0 | 1,856.0 | 2,300.0 | 2,736.0 | 3,375.0 |
| 150 mm | 891.0 | 1,184.0 | 1,475.0 | 1,764.0 | 2,336.0 | 2,900.0 | 3,456.0 | 4,275.0 |
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 angle (l section) in every material
Geometry is fixed and only density changes, so this table is the whole material-selection question in one view. Aluminum 7075-T6 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 | 3.729 | 2.506 | +0.0 % |
| Stainless Steel 304 | 8,000 | 0.2890 | 3.800 | 2.553 | +1.9 % |
| Stainless Steel 316 | 8,000 | 0.2890 | 3.800 | 2.553 | +1.9 % |
| Stainless Steel 316L | 8,000 | 0.2890 | 3.800 | 2.553 | +1.9 % |
| Stainless Steel 430 | 7,700 | 0.2782 | 3.658 | 2.458 | -1.9 % |
| Aluminum 6061-T6 | 2,700 | 0.0975 | 1.282 | 0.862 | -65.6 % |
| Aluminum 5052-H32 | 2,680 | 0.0968 | 1.273 | 0.855 | -65.9 % |
| Aluminum 7075-T6 | 2,810 | 0.1015 | 1.335 | 0.897 | -64.2 % |
| Copper C11000 | 8,940 | 0.3230 | 4.247 | 2.854 | +13.9 % |
| Brass C36000 | 8,500 | 0.3071 | 4.037 | 2.713 | +8.3 % |
| Bronze C93200 | 8,800 | 0.3179 | 4.180 | 2.809 | +12.1 % |
| Titanium Grade 2 | 4,510 | 0.1629 | 2.142 | 1.440 | -42.5 % |
| Gray Cast Iron | 7,200 | 0.2601 | 3.420 | 2.298 | -8.3 % |
| Lead | 11,340 | 0.4097 | 5.386 | 3.620 | +44.5 % |
| Rigid PVC (Type I) | 1,400 | 0.0506 | 0.665 | 0.447 | -82.2 % |
| HDPE (PE 100) | 960 | 0.0347 | 0.456 | 0.306 | -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 aluminum 7075-t6
Zinc-bearing, aerospace-grade and the strongest aluminium in ordinary supply — comparable in strength to some mild steels. It is also the densest aluminium here at 2,810 kg/m³, which is the trade-off nobody mentions: choosing 7075 over 6061 for strength costs 4.1 % more mass for the same volume. Its corrosion resistance is poor without cladding or anodising, and it is generally considered unweldable, so it belongs in machined and riveted parts, not fabricated frames.
- Density
- 2,810 kg/m³ = 0.1015 lb/in³ · 0.3580× carbon steel · typical spread ±1 %
- Specification
- ASTM B211 / B209 (T6 temper)
- Equivalents
- EN AW-7075 · JIS A7075 · GB 7075
- Typical uses
- Aerospace structural parts · High-load bicycle and motorsport · Moulds and tooling plate · Precision machined fittings
Not recommended for sustained elevated-temperature service; strength falls off well before 6061’s does.
About angle (l section)
The angle formula quietly removes a double-counted corner: A = t(a + b − t) is t times each leg, less one t² for the square where the legs overlap. Skipping that correction overstates the area of a 50 × 50 × 5 angle by 10 %. Angles also bend about neither leg — the governing axis passes through the centroid, which sits off both legs, and it is why an equal angle is normally used back-to-back with a twin where bending matters. This table holds legs equal; put unequal legs into the calculator when the drawing specifies them.
Specified as leg a × leg b × thickness. Say whether the toe is square or radiused, and whether it is equal-leg.
Download this data
AL 7075 angle (l section) — 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 aluminum 7075-t6 angle (l section) weigh?
At the reference dimensions (a = 50 mm, b = 50 mm, t = 5 mm) a aluminum 7075-t6 angle (l section) of this size weighs 1.335 kg/m, or 0.897 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 angle (l section) calculated?
Weight is cross-sectional area × length × density. For this shape the area is A = t · (a + b − t). At the reference dimensions that gives 475.0 mm², and multiplying by aluminum 7075-t6's density of 2,810 kg/m³ gives 1.335 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 aluminum 7075-t6 weigh more or less than steel?
It is lighter than carbon steel for the same section — about 64 % lighter at 2,810 kg/m³. Density is the only variable: the cross-sectional area depends purely on geometry, so a angle (l section) of the same dimensions has the same area in every material and the mass simply scales with density. In this case the ratio is 0.3580× carbon steel.
What is the cross-sectional area of a angle (l section)?
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 475.0 mm² (0.7363 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 al 7075 angle (l section) weigh the same as a al 7075 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 AL 7075 weight or carbon steel weight for costing?
Use the material you are actually buying. At 2,810 kg/m³ against carbon steel's 7,850 kg/m³, the same angle (l section) differs by 64.2 % 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 3.729 kg/m for comparison.
Other materials, same angle (l section)
The same geometry in every material, so the only variable is density.
- Carbon steel angle (l section) — 7850 kg/m³
- SS 304 angle (l section) — 8000 kg/m³
- SS 316 angle (l section) — 8000 kg/m³
- AL 6061 angle (l section) — 2700 kg/m³
- Copper angle (l section) — 8940 kg/m³
- Brass angle (l section) — 8500 kg/m³
- HDPE angle (l section) — 960 kg/m³
- PVC angle (l section) — 1400 kg/m³
Other AL 7075 sections
The same density applied to every shape the site covers.
- AL 7075 round bar — A = π/4 · d²
- AL 7075 square bar — A = a²
- AL 7075 hexagonal bar — A = (√3/2) · AF² ≈ 0.8660 · AF²
- AL 7075 flat bar — A = w · t
- AL 7075 plate — A = w · t
- AL 7075 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
Angle (L Section) area from A = t · (a + b − t). Mass computed as area × length × density at 2,810 kg/m³ (ASTM B211 / B209 (T6 temper)). 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.