Bronze C93200 Square Bar Weight
Mass per metre and per foot for bronze c93200 square bar at 8,800 kg/m³ (ASTM B505 (UNS C93200, bearing bronze)). Every figure is for the section as drawn. A 6 m length of this size weighs 33.0 kg (73.9 lb per 20 ft).
At the reference dimensions (a = 25 mm) this section has a cross-sectional area of 625.0 mm², giving 5.500 kg/m (3.696 lb/ft). Against carbon steel's 7,850 kg/m³ that is +12.1 % — the same section in steel would be 4.906 kg/m.
Square Bar — formula and derivation
Area of a square bar
A = a²
A = a², where a is the side length
Worked through with the default dimensions:
A = a²A = 25²A = 625.0 mm²
- a
- Side
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 8,800 kg/m³ that is 5.5000 kg/m for the reference size above.
Bronze square bar — size series
| Side | Cross-section | Mass / length |
|---|---|---|
| 6.0 mm | 36.00 mm² · 0.0558 in² | 0.317 kg/m · 0.213 lb/ft |
| 8.0 mm | 64.00 mm² · 0.0992 in² | 0.563 kg/m · 0.378 lb/ft |
| 10 mm | 100.00 mm² · 0.1550 in² | 0.880 kg/m · 0.591 lb/ft |
| 12 mm | 144.00 mm² · 0.2232 in² | 1.267 kg/m · 0.852 lb/ft |
| 16 mm | 256.00 mm² · 0.3968 in² | 2.253 kg/m · 1.514 lb/ft |
| 20 mm | 400.00 mm² · 0.6200 in² | 3.520 kg/m · 2.365 lb/ft |
| 25 mm | 625.00 mm² · 0.9688 in² | 5.500 kg/m · 3.696 lb/ft |
| 30 mm | 900.00 mm² · 1.3950 in² | 7.920 kg/m · 5.322 lb/ft |
| 40 mm | 1,600.00 mm² · 2.4800 in² | 14.080 kg/m · 9.461 lb/ft |
| 50 mm | 2,500.00 mm² · 3.8750 in² | 22.000 kg/m · 14.783 lb/ft |
| 60 mm | 3,600.00 mm² · 5.5800 in² | 31.680 kg/m · 21.288 lb/ft |
| 80 mm | 6,400.00 mm² · 9.9200 in² | 56.320 kg/m · 37.845 lb/ft |
| 100 mm | 10,000.00 mm² · 15.5000 in² | 88.000 kg/m · 59.133 lb/ft |
Computed for Bronze at 8800 kg/m³ (0.3179 lb/in³). ASTM B505 (UNS C93200, bearing bronze).
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.
Imperial sizes
Square Bar is also bought in inch sizes. The conversions below are exact (1 in = 25.4 mm by definition), so the metric equivalents are the true millimetre dimensions rather than a rounded nominal figure.
| Stock size | Metric equivalent mm | Cross-section | Mass / length |
|---|---|---|---|
| 1/4 in | 6.35 | 40.32 mm² · 0.0625 in² | 0.355 kg/m · 0.238 lb/ft |
| 3/8 in | 9.52 | 90.73 mm² · 0.1406 in² | 0.798 kg/m · 0.536 lb/ft |
| 1/2 in | 12.70 | 161.29 mm² · 0.2500 in² | 1.419 kg/m · 0.954 lb/ft |
| 5/8 in | 15.88 | 252.02 mm² · 0.3906 in² | 2.218 kg/m · 1.490 lb/ft |
| 3/4 in | 19.05 | 362.90 mm² · 0.5625 in² | 3.194 kg/m · 2.146 lb/ft |
| 1 in | 25.40 | 645.16 mm² · 1.0000 in² | 5.677 kg/m · 3.815 lb/ft |
| 1-1/4 in | 31.75 | 1,008.06 mm² · 1.5625 in² | 8.871 kg/m · 5.961 lb/ft |
| 1-1/2 in | 38.10 | 1,451.61 mm² · 2.2500 in² | 12.774 kg/m · 8.584 lb/ft |
| 2 in | 50.80 | 2,580.64 mm² · 4.0000 in² | 22.710 kg/m · 15.260 lb/ft |
| 2-1/2 in | 63.50 | 4,032.25 mm² · 6.2500 in² | 35.484 kg/m · 23.844 lb/ft |
| 3 in | 76.20 | 5,806.44 mm² · 9.0000 in² | 51.097 kg/m · 34.335 lb/ft |
| 4 in | 101.60 | 10,322.56 mm² · 16.0000 in² | 90.839 kg/m · 61.041 lb/ft |
Stock sizes in inches, converted exactly at 25.4 mm per inch. Material: Bronze C93200 at 8800 kg/m³.
The same square bar in every material
Geometry is fixed and only density changes, so this table is the whole material-selection question in one view. Bronze C93200 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 | 4.906 | 3.297 | +0.0 % |
| Stainless Steel 304 | 8,000 | 0.2890 | 5.000 | 3.360 | +1.9 % |
| Stainless Steel 316 | 8,000 | 0.2890 | 5.000 | 3.360 | +1.9 % |
| Stainless Steel 316L | 8,000 | 0.2890 | 5.000 | 3.360 | +1.9 % |
| Stainless Steel 430 | 7,700 | 0.2782 | 4.813 | 3.234 | -1.9 % |
| Aluminum 6061-T6 | 2,700 | 0.0975 | 1.688 | 1.134 | -65.6 % |
| Aluminum 5052-H32 | 2,680 | 0.0968 | 1.675 | 1.126 | -65.9 % |
| Aluminum 7075-T6 | 2,810 | 0.1015 | 1.756 | 1.180 | -64.2 % |
| Copper C11000 | 8,940 | 0.3230 | 5.588 | 3.755 | +13.9 % |
| Brass C36000 | 8,500 | 0.3071 | 5.313 | 3.570 | +8.3 % |
| Bronze C93200 | 8,800 | 0.3179 | 5.500 | 3.696 | +12.1 % |
| Titanium Grade 2 | 4,510 | 0.1629 | 2.819 | 1.894 | -42.5 % |
| Gray Cast Iron | 7,200 | 0.2601 | 4.500 | 3.024 | -8.3 % |
| Lead | 11,340 | 0.4097 | 7.088 | 4.763 | +44.5 % |
| Rigid PVC (Type I) | 1,400 | 0.0506 | 0.875 | 0.588 | -82.2 % |
| HDPE (PE 100) | 960 | 0.0347 | 0.600 | 0.403 | -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 bronze c93200
Tin-lead bearing bronze, the standard material for plain bushes and wear plates because its microstructure carries a soft lead phase that acts as a built-in lubricant. At 8,800 kg/m³ it sits between copper and brass, and being a cast alloy its density genuinely varies more than the wrought metals — 8,700 to 9,000 kg/m³ is normal across bronze chemistries, so a take-off on a large cast bush should come from the caster’s certificate, not from a table.
- Density
- 8,800 kg/m³ = 0.3179 lb/in³ · 1.1210× carbon steel · typical spread ±3 %
- Specification
- ASTM B505 (UNS C93200, bearing bronze)
- Equivalents
- SAE 660 · EN CW458K · GB ZQSn6-6-3
- Typical uses
- Plain bearings and bushes · Worm gears · Pump and valve components · Wear plates
Cast alloys carry higher density uncertainty than wrought. Typical spread 8,700–9,000 kg/m³.
About square bar
A square bar has 27.3 % more area than the round bar that circumscribes it (a = d) and 21.5 % more mass — the corners of the square sit outside the circle. The reverse comparison is more useful in practice: a round bar of diameter d fits inside a square of side d with material to spare, so swapping square for round at the same nominal size removes about 21 % of the weight and produces a very similar-looking part.
Specified by side. State whether corners must be sharp or radiused; standard stock usually has a small corner radius.
Download this data
Bronze square bar — 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 bronze c93200 square bar weigh?
At the reference dimensions (a = 25 mm) a bronze c93200 square bar of this size weighs 5.500 kg/m, or 3.696 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 square bar calculated?
Weight is cross-sectional area × length × density. For this shape the area is A = a². At the reference dimensions that gives 625.0 mm², and multiplying by bronze c93200's density of 8,800 kg/m³ gives 5.500 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 bronze c93200 weigh more or less than steel?
It is heavier than carbon steel for the same section — about 12 % heavier at 8,800 kg/m³. Density is the only variable: the cross-sectional area depends purely on geometry, so a square bar of the same dimensions has the same area in every material and the mass simply scales with density. In this case the ratio is 1.1210× carbon steel.
What is the cross-sectional area of a square bar?
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 625.0 mm² (0.9688 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 bronze square bar weigh the same as a bronze 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 Bronze weight or carbon steel weight for costing?
Use the material you are actually buying. At 8,800 kg/m³ against carbon steel's 7,850 kg/m³, the same square bar differs by 12.1 % 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 4.906 kg/m for comparison.
Other materials, same square bar
The same geometry in every material, so the only variable is density.
- Carbon steel square bar — 7850 kg/m³
- SS 304 square bar — 8000 kg/m³
- SS 316 square bar — 8000 kg/m³
- AL 6061 square bar — 2700 kg/m³
- Copper square bar — 8940 kg/m³
- Brass square bar — 8500 kg/m³
- HDPE square bar — 960 kg/m³
- PVC square bar — 1400 kg/m³
Other Bronze sections
The same density applied to every shape the site covers.
- Bronze round bar — A = π/4 · d²
- Bronze hexagonal bar — A = (√3/2) · AF² ≈ 0.8660 · AF²
- Bronze flat bar — A = w · t
- Bronze plate — A = w · t
- Bronze round tube — A = π/4 · (D² − d²), d = D − 2t
- Bronze square tube — A = a² − (a − 2t)²
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
Square Bar area from A = a². Mass computed as area × length × density at 8,800 kg/m³ (ASTM B505 (UNS C93200, bearing bronze)). 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.