Skip to main content
ExpertToolkit
Calculators
Health calculators
  • BMI calculator
  • BMR calculator
  • Body fat calculator
  • Ideal weight calculator
Math calculators
  • Percentage calculator
  • Circle area calculator
  • Rectangle area calculator
  • Pythagorean theorem calculator
  • Tip calculator
  • Discount calculator
Converters
Unit conversions
  • Meters to Feet
  • Kilograms to Pounds
  • Celsius to Fahrenheit
  • Kilometers/hour to miles/hour
  • Square meters to square feet
Material density
  • Concrete: 1 yd3 to tons
  • Diesel: gallons to pounds
  • Metals ranked by density
  • Steel vs aluminum 6061
Wire gauge
  • 12 AWG, 20A, 50 ft
  • 120V, 15A, 75 ft
  • 10 AWG vs 8 AWG
  • EV charger, 50A at 240V
Formulas
Health
  • BMI formula
Math
  • Percentage formula
Tables
Length tables
  • Meters to feet table
HomeConvertersMaterial DensityComparesteel vs aluminum-6061

Structural steel vs Aluminum alloy 6061 Density Comparison

Structural steel (7850 kg/m3) is 2.91x denser than Aluminum alloy 6061 (2700 kg/m3). Side-by-side density tables, weight-per-volume charts, and use-case comparison.

Structural steel vs Aluminum alloy 6061 Density Comparison | ExpertToolkit

91 times denser than 6061 aluminum: 7,850 kg/m³ (490 lb/ft³, the AISC design value) against 2,700 kg/m³ (169 lb/ft³, the Aluminum Association figure for 6061). That ratio is the starting point of every steel-versus-aluminum decision, but it is not the decision itself.

Computed result

1 m3 to kg

8 000 kg

Structural steel: 1 m3 becomes 8 000 kg.

Reverse check

8 000 kg back to m3

1 m3

Reverse check returns approximately 1 m3 for Structural steel.

All output units

Same Structural steel calculation shown across compatible weight output units, including bulk and industrial units when relevant.

unitoutput
kg8 000 kg
g8 000 000 g
mg8 000 000 000 mg
lb20 000 lb
oz300 000 oz
tonne8 tonne

Showing 6 of 11 rows for unit.

Formula

output=inputvolume×volumefactor×density/massfactor\text{output} = input_volume \times volume_factor \times \text{density} / mass_factoroutput=inputv​olume×volumef​actor×density/massf​actor

Calculation steps

Convert volume: 1 m3 x 1 = 1 m3.
Apply density: 1 m3 x 7850 kg/m3 = 7 850 kg.
Convert mass: 7 850 kg / 1 = 8 000 kg.
Sig-fig compliance: output rounded to 1 significant figures from the entered value.

Unit and density definitions

m3 means cubic meter in the material-density registry.
kg means kilogram in the material-density registry.
The bridge between them is Structural steel density, not a direct unit factor.

Nearby values

Nearby values around 1 m3.

inputoutput
0.5 m34 000 kg
1 m38 000 kg
1.5 m312 000 kg
2 m320 000 kg

Density range table

Low, typical, and high density cases for Structural steel.

Shows how much the answer moves when density varies for Structural steel.

density_casedensity_kg_m3output
low7,7507 750 kg
typical7,8507 850 kg
high8,0508 050 kg

Output scale

Visual Analysis1 series6 points

Computed output curve for Structural steel using 7850 kg/m3 and representative m3 values for this unit family.

Trend
Upward
Min
785
Max
196.3K
Insight
Structural steel typical density shows an upward pattern, with a visible peak around 25 at 196.3K.
78549.7K98.5K147.4K196.3K0.10.5151025
X-axis: m3Y-axis: kg

Output scale

Common mistakes with steel vs 6061 aluminum density

Scaling weight savings straight from the density ratio. A stiffness-governed beam redesigned in aluminum at equal deflection saves roughly half the weight, not two-thirds, because the section must grow to compensate for the lower modulus. Only strength-governed, compact parts capture the full 2.91× ratio.
Ignoring fatigue. Steel has an endurance limit — below roughly half its ultimate strength, cyclic loading can run indefinitely.

Sources & Standards

  1. Rumble, J. R., ed. "CRC Handbook of Chemistry and Physics," 105th Edition. CRC Press, 2024.Reference densities of metals, alloys, liquids, and common materials
  2. ASTM International. "Annual Book of ASTM Standards."Material specifications and property standards referenced in density and material calculations

Verify this result

This answer is computed by MaterialDensityRegistry.compare (v1.0.0). The same inputs always produce the same figure and the same fingerprint below, so you can reproduce and cite it.

Standards

  • ASTM B258-18 — Standard nominal diameters and cross-sectional areas
  • NIST SP 330 — The International System of Units (SI) — mass and volume units
  • Engineering reference compilation — Density reference for Structural steel
  • Engineering reference compilation — Density reference for Aluminum alloy 6061

Assumptions

  • Basistypical published density, same volume
  • Structural steel confidenceengineering-estimate
  • Aluminum alloy 6061 confidenceengineering-estimate

Inputs & outputs

  • in · materialAsteel
  • in · materialBaluminum-6061
  • in · densityAKgM37850
  • in · densityBKgM32700
  • out · denserStructural steel
  • out · densityDeltaKgM35150
  • out · densityRatio2.9074

Computation fingerprint (SHA-256)

a7075d2ea8ca947ab9aa9cd65dbc90a5c63e9f530715fc58737bdace170d46ab

Related material conversions

steel vs 6061 aluminum density — frequently asked questions

If 6061-T6 is nearly as strong as A36 steel, why does steel still dominate structures?
Stiffness, fatigue, fire behavior, joining, and price per pound. Steel's threefold modulus advantage controls deflection-governed design; it welds without losing temper (6061-T6 loses roughly 40 % of its strength in the heat-affected zone unless re-aged); it survives fire longer (aluminum loses strength rapidly above 150–200 °C); and per unit of strength it is usually cheaper. Aluminum wins where the weight itself is the payoff — transport, masts, portable equipment.
What does the 2.91× ratio mean per foot of a real shape?
Take a 2 × 2 × 1/4 inch square tube: about 5.4 lb/ft in steel and 1.9 lb/ft in 6061 at identical dimensions. Over a 20 ft frame member that is 70 lb saved — the difference between a two-person lift and a crane pick repeated across a structure.
Do these densities change with alloy or temper?
Effectively no. Heat treatment changes strength, not density: 6061-O and 6061-T6 both weigh 2,700 kg/m³, and steel stays within the 7,750–8,050 kg/m³ range this page shows across common structural grades. Weight calculations survive an alloy or temper change; strength calculations do not.

Structural steel vs Aluminum alloy 6061 — density comparison

Structural steel is 2.91× denser than Aluminum alloy 6061.
Structural steel density: 7850 kg/m³. Aluminum alloy 6061 density: 2700 kg/m³.
Per 1 m³, Structural steel weighs 7 850 kg vs 2 700 kg for Aluminum alloy 6061 — a difference of 5 150 kg.

Structural steel vs Aluminum alloy 6061 — density properties

Density comparison: Structural steel (7850 kg/m³) vs Aluminum alloy 6061 (2700 kg/m³).

PropertyStructural steelAluminum alloy 6061
Density (kg/m³)7 8502 700
Density range low (kg/m³)7 7502 680
Density range high (kg/m³)8 0502 720
CategoryMetalMetal
Data confidenceengineering estimateengineering estimate
Weight per 1 m³ (kg)7 8502 700

Showing 6 of 8 rows for Property.

Weight comparison across common volumes

Visual Analysis2 series7 points

Structural steel vs Aluminum alloy 6061 weight at 7 common volumes.

Trend
Upward
Min
7.85
Max
8.2K
Insight
Structural steel shows an upward pattern, with a visible peak around 275 gal IBC at 8.2K.
Insight
Aluminum alloy 6061 shows an upward pattern, with a visible peak around 275 gal IBC at 2.8K.
7.852.0K4.1K6.1K8.2K1111155275
X-axis: VolumeY-axis: Weight (kg)

Weight comparison across common volumes

Structural steel vs Aluminum alloy 6061 density

Structural steel density is 7850 kg/m3; Aluminum alloy 6061 density is 2700 kg/m3.
The denser material packs more weight into the same space, which drives payload limits, storage loads, freight cost, and substitution decisions.

Structural steel vs Aluminum alloy 6061 FAQ

Which is denser, Structural steel or Aluminum alloy 6061? Structural steel is denser.
Can I substitute one material for the other by weight? Only after checking volume, density range, grade, strength, and project specifications.
Why do density ranges matter? Ranges capture moisture, grade, packing, alloy, concentration, or supplier variation.
On This Page
  • Structural steel vs Aluminum alloy 6061 Density Comparison | ExpertToolkit
  • Computed result
  • Reverse check
  • All output units
  • Formula
  • What moves the density of Structural steel
  • Calculation steps
  • Unit breakdown
Common Questions
  • If 6061-T6 is nearly as strong as A36 steel, why does steel still dominate structures?
  • What does the 2.91× ratio mean per foot of a real shape?
  • Do these densities change with alloy or temper?
Material Density
  • Concrete yd3 to tons
All Tools
  • Calculators Hub
  • Converters Hub
  • Reference Tables
  • Formulas Hub
Method & sources

Density values come from ASTM specifications and standard reference handbooks.

ExpertToolkit

Free calculators, converters, and reference tables. Every tool shows its formula and its sources.

BIPM/NIST Standards Reviewed
Method and AccuracyStandards: reviewed units and formulasMethodologyEditorially maintainedStandards reviewed regularly

For corrections, privacy questions, or broken pages, contact support@experttoolkit.net

Content reviewed by Anoop Kumar

Core Hubs

  • Calculators
  • Converters
  • Formulas
  • Reference Tables
  • Embed widgets
  • Connect to AI

Popular Tools

  • 12 AWG 20A check
  • EV charger wire size
  • Concrete yd3 to tons
  • Metals ranked by density
  • BMI calculator
  • Meters to feet

Authority

  • Methodology
  • Sources & Standards
  • Rounding Policy
  • Editorial Policy
  • Corrections Policy
  • Disclaimer
  • Sitemap

Legal

  • Privacy Policy
  • Terms of Service
  • Contact
  • Email Support
  • Report an issue
  • Suggest a tool
  • About Us

© 2026 ExpertToolkit. All rights reserved.

Release 2.5Market: United States
22.56965941tonne

Concrete, normal weight: 12.3 yd3 becomes 22.56965941 tonne.

Density:2400 kg/m3Range:2200-2500 kg/m3Confidence:variablePractical range:20.68885446 - 23.51006188 tonne

Density is variable; use supplier, lab, or contract-specific density for critical work.

Density source & professional warnings

Variable bulk-density estimate. Common reinforced concrete estimate.

Use supplier, lab, or contract-specific density for critical work.

Material densities are planning estimates. Moisture, temperature, compaction, alloy composition, and product grade can change real shipment or engineering values. Use supplier or lab density for contract-critical work.

Derivation steps
  1. Convert volume: 12.3 yd3 x 0.764554857984 = 9.40402475 m3.
  2. Apply density: 9.40402475 m3 x 2400 kg/m3 = 22 569.65940769 kg.
  3. Convert mass: 22 569.65940769 kg / 1000 = 22.56965941 tonne.
  4. Sig-fig compliance is off; display uses practical precision.