Density of Brass

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Brass & copper alloy density reference

Nominal densities for all 20 alloys in the Brassland materials library. Each links to its full datasheet.

Alloy (EN / UNS)	Common name	Density (g/cm³)	Typical use
CW614N / CuZn39Pb3	Free-machining brass (machining std.)	8.50	Precision turned components
CW617N / CuZn40Pb2	Hot-working brass	8.47	Forged & machined fittings
CW602N / CuZn36Pb2As	DZR brass	8.44	Potable-water fittings
CW607N / CuZn38Pb1	Free-machining brass	8.44	Water-side components
CW612N / CuZn39Pb2	Machining/forging brass	8.40	Forged blanks, machined parts
CW625N / CuZn35Pb1.5AlAs	Low-lead DZR brass	8.44	Drinking-water components
CW510L / CuZn42	Low-lead brass	8.37	Low-lead turned parts
CuZn37 / CW508L	Deep-drawing brass	8.44	Cold-formed parts
CuZn40 / CW509L	Duplex brass	8.39	General engineering
CW724R / CuZn21Si3P	Lead-free silicon brass	8.30	Drinking-water, RoHS-critical
C36000	Free-cutting brass (UNS)	8.49	High-speed turned parts
C37700	Forging brass (UNS)	8.44	Hot-forged components
C35330	DZR brass (UNS)	8.45	Potable-water fittings
C27450	Low-lead brass (UNS)	8.44	Plumbing & hardware
C46400	Naval brass	8.41	Marine & corrosive duty
C69300 / CuZn21Si3P	Lead-free silicon brass (UNS)	8.30	Lead-free programmes
C6802	Bismuth brass (JIS)	8.41	Lead-free applications
C11000 (ETP)	Electrolytic tough pitch copper	8.90	Electrical / EV terminals
C14500	Tellurium copper	8.94	High-conductivity machined parts

See the full materials & alloys library for chemistry, mechanical properties and standards equivalents.

References: densities per EN 12164 / EN 12165 / EN 1652 nominal values and ASTM B16 / B124. Cross-checked against supplier mill datasheets.

Using these values

Densities are nominal per EN 12164/12165 and CDA data — real bars vary a fraction of a percent with exact chemistry. Convert to imperial by ×0.03613: CW614N 8.50 g/cm³ = 0.307 lb/in³. For part or bar mass, feed these values into the brass weight calculator.

Brass against other metals

Machining brass (8.4–8.5 g/cm³) is ~8% denser than carbon steel (7.85), noticeably lighter than pure copper (8.90–8.94) and three times aluminium (2.70). Within brass, lead raises density (leaded grades 8.44–8.52) and silicon lowers it — lead-free CW724R sits at 8.30 g/cm³, which slightly reduces material cost per part at equal geometry.

Density in quoting and logistics

Density drives material cost (brass is bought by weight), freight (chargeable weight of dense small parts is real weight, not volume) and duty calculations. Every alloy above links to its full datasheet with chemistry, mechanicals and standards equivalents in the materials library.

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Thread Size Chart

Major, pitch and minor diameters for ISO metric, UNC, BSP (G) and NPT threads — with tap drill sizes.

Tap Drill Chart

Recommended tap-drill sizes for ISO metric, UNC, BSP (G) and NPT threads at ~75% engagement.

Limits & Fits

Type a size and a class or fit — H7, g6, H7/g6, H7/p6 — and get limit dimensions and deviations.

Insert Installation

Boss hole diameters, heat-set tip temperatures and seating-force guidance for brass threaded inserts.

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The complete Brassland toolset on one page.

Frequently asked questions

What is the density of brass?

Most machining brasses are 8.4–8.5 g/cm³: CW614N ≈ 8.50, CW617N ≈ 8.47, C36000 ≈ 8.49. Lead-free silicon brass CW724R is ≈ 8.30 g/cm³.

What is the density of brass in lb/in³?

Multiply g/cm³ by 0.03613: CW614N 8.50 g/cm³ ≈ 0.307 lb/in³; CW724R 8.30 ≈ 0.300 lb/in³; copper C11000 8.90 ≈ 0.322 lb/in³.

Is brass heavier than steel?

Yes — brass at 8.4–8.5 g/cm³ is about 8% denser than carbon steel (7.85 g/cm³), and roughly three times as dense as aluminium (2.70 g/cm³).

Why do brass alloys differ in density?

Composition: lead (11.3 g/cm³) raises density slightly in leaded grades, while silicon and higher zinc lower it — hence lead-free CW724R at 8.30 versus CW614N at 8.50 g/cm³.

Is specific gravity the same as density?

Numerically yes for practical purposes: specific gravity is density relative to water (1 g/cm³), so CW614N has a specific gravity of 8.50 and a density of 8.50 g/cm³.