Copper vs Brass vs Bronze: Cost, Properties & Uses

Is copper more expensive than brass? Not always. C110 copper sheet, C260 brass sheet and C360 brass bar are different buying specifications, and their delivered cost changes with metal markets, product form, temper, dimensions, quantity, yield and conversion work. Compare supplier quotes for the same date, form and finished-part scope instead of relying on a generic per-kilogram ranking.

Choose copper when electrical or thermal conductivity leads the decision, brass when machinability, forming or appearance matters, and bronze when wear or bearing duty dominates. Cost should confirm a technically suitable shortlist, not replace material selection.

This comparison narrows the choice by conductivity, machinability, corrosion resistance, wear and cost, then lists the grade, product form and documentation an OEM should place on the drawing or RFQ.

Is copper more expensive than brass?

Often, a like-for-like high-copper-content material can cost more than a brass alloy, but that is not a dependable purchasing rule. Sheet, strip and bar are different products; alloy surcharges, temper, order size, machining or stamping, scrap recovery and quote date can reverse the comparison. Ask for current quotes covering the same product form, dimensions, delivery basis and finished-part scope before concluding which option is more costly.

Cost comparison	What can be concluded before a live quote?
C110 copper sheet vs C260 brass sheet	A like-for-like comparison is possible only after form, temper, gauge, quantity, yield and quote date match.
C110 sheet vs C360 bar	No useful family-level ranking; both the alloy and purchased form differ.
C260 formed part vs C110 formed part	Material price is only one input; blank yield, cycle time, tooling, finishing and scrap recovery can change finished-part cost.
Copper or brass vs a bronze grade	Specify the bronze family and product form first; phosphor-bronze strip and cast bearing bronze are different supply chains.

If conductivity drives the decision, compare the released geometry against custom copper busbar fabrication. If the component needs controlled strip forming or a spring contact, review phosphor bronze stamping capabilities and state the exact alloy, temper and inspection requirements.

If the selected part needs forming, use the copper K-factor and bend allowance guide before releasing the flat pattern. If the alloy or heat must remain auditable through production, specify the MTR and lot-traceability chain in the RFQ.

For a drawing-based sourcing decision, send the alloy, temper, thickness, quantity and required records for an engineering RFQ review; material substitution remains subject to buyer approval.

The Compositional Difference

The entire performance distinction starts with what’s alloyed with the copper:

Material	Base	Primary Alloying	Common Grades
Copper	Cu (99.9%+)	Trace oxygen / phosphorus	C110, C101, C102, C122
Brass	Cu	Zinc (Zn) 5-45%	C260, C360, C385, C464
Bronze	Cu	Tin (Sn), Aluminum, or other	C510, C932, C954, C544

The alloying system is a starting point. Exact composition, temper, product form and processing also determine the properties of the purchased material.

Copper: The Conductivity Champion

Pure copper is the standard against which all other electrical conductors are measured — literally. IACS (International Annealed Copper Standard) sets pure copper at 100% conductivity, and everything else is rated relative to it.

Key copper grades

Grade	Composition	Key Property	Typical Use
C11000 (ETP)	99.90% minimum Cu, oxygen-bearing	CDA reference: 101% IACS at 20°C	Busbars and electrical components
C10100 (OFE)	99.99% minimum Cu; oxygen 0.0005% maximum	High-conductivity oxygen-free electronic copper	Vacuum-tube and electronic components
C10200 (OF)	99.95% minimum Cu; oxygen 0.0010% maximum	Oxygen-free grade; not literally zero oxygen	Electrical and cryogenic components
C12200 (DHP)	99.9% minimum Cu; phosphorus 0.015-0.040%	Phosphorus-deoxidized, high residual phosphorus	Plumbing and refrigeration tubing

DHP and DLP are different designations. C12200 is DHP; C12000 is DLP, with lower residual phosphorus. Use the full UNS number on the RFQ. The CDA wrought-copper composition register gives the composition limits; nominal shorthand is not an interchangeable grade specification.

Copper key properties

Property	Grade-specific reference or purchasing requirement
Density	Approximately 8.91 g/cm³ for C11000 at 20°C
Electrical conductivity	CDA reference at 20°C: C11000 101% IACS; C12200 85% IACS
Thermal conductivity	Approximately 391 W/m·K for C11000 and 339 W/m·K for C12200 at 20°C, converted from CDA data
Tensile strength	Specify the grade, product form and temper; use the corresponding material specification
Melting range	Approximately 1,065-1,083°C for C11000; not a universal range for every copper grade
Color	Reddish-pink

These C11000 and C12200 reference values show why a phosphorus-deoxidized tubing grade should not inherit an electrical-copper conductivity specification. Contractual acceptance values must come from the specified grade, form and standard.

When to specify copper

• Electrical busbars and connectors — when conductivity matters more than strength
• Heat exchangers and heat sinks — select the required thermal conductivity, grade and joining route together
• Antimicrobial touch surfaces — only where the specific material and product meet the applicable registration and label conditions; EPA guidance treats these surfaces as supplemental to routine cleaning and disinfection
• High-vacuum applications — C10100 OFE is a candidate; an alloy name alone does not establish component cleanliness or outgassing performance
• Refrigeration and HVAC tubing — formability + corrosion resistance

For deeper copper applications, see our copper material capabilities.

Brass: The Machinist’s Friend

Brass is copper + zinc — and the zinc content changes its properties and processing behavior. Select the exact grade and temper for the required strength and forming route; neither price nor corrosion resistance follows from zinc content alone.

Key brass grades

Grade	Composition	Key Property	Typical Use
C260 (Cartridge)	70% Cu / 30% Zn	Excellent cold formability	Cartridge cases, deep drawing
C360 (Free-Cutting)	61.5% Cu / 35.5% Zn / 3% Pb	Copper-alloy machinability reference grade	CNC machined fittings, valves
C385 (Architectural)	60% Cu / 38% Zn / 2% Pb	Hot-formable, decorative	Architectural trim, hardware
C46400 (Naval, uninhibited)	59-62% Cu / 0.5-1.0% Sn / Zn remainder	Marine-hardware candidate; exposure review required	Marine fittings and hardware

Brass key properties

Property	C260 (Cartridge)	C360 (Free-Cutting)
Density	Approximately 8.53 g/cm³	Approximately 8.50 g/cm³
Electrical conductivity	28% IACS	26% IACS
Tensile strength	300-415 MPa (annealed)	340-470 MPa (cold-drawn)
Machinability rating	30%	100% (industry baseline)
Formability	Excellent	Limited (lead inclusions)
Color	Bright yellow-gold	Bright yellow-gold

When to specify brass

• CNC machined components at volume — C360 is widely selected for free-cutting behavior
• Machined fittings and valves — consider C36000 only where the service conditions and lead restrictions allow it
• Architectural hardware — C385 for hot-formed door pulls, hinges, decorative trim
• Deep-drawn enclosures — evaluate C26000 sheet in the specified forming temper; its composition allows trace lead, so do not describe it as literally lead-free from the family name
• Marine fittings — C46400 may be considered after checking the actual water chemistry, stress and corrosion requirements

⚠️ Brass warnings

Environment	Concern	Selection check
Hot water with chlorides	Susceptible brasses can dezincify, depending on chemistry and service conditions	Specify the required corrosion performance; C46400 is an uninhibited naval brass, not an automatic dezincification-resistant substitute
Ammonia atmospheres	Stress corrosion cracking can affect stressed high-zinc brasses, including C26000	Do not treat C26000 as an ammonia-resistant replacement; review alloy, stress and exposure with the designer
Drinking water (USA)	Lead content and substances leaching into water are separate checks	Assess the exact component against applicable NSF/ANSI/CAN 372 lead-content and NSF/ANSI/CAN 61 health-effects requirements; a grade name alone is insufficient
Sliding contact (bearings)	Wear depends on load, speed, shaft and lubrication	Evaluate an appropriate bearing grade such as C93200 against the bearing design, not family name alone

CDA identifies C46400 as uninhibited naval brass and documents ammonia stress-corrosion susceptibility in brasses including C26000. NSF distinguishes lead-content verification under 372 from extraction/leaching requirements such as 61.

For our complete brass material capabilities, see our material page.

Bronze: The Wear and Marine Specialist

The word bronze covers several copper-alloy families. Tin bronze, phosphor bronze, aluminum bronze and bearing bronze do not share one composition or one set of properties. Some grades are selected for springs, some for sliding bearings and others for strength or corrosion resistance. Compare the exact grade and product form rather than assuming every bronze is interchangeable.

Key bronze grades

Grade	Composition	Key Property	Typical Use
C510 (Phosphor Bronze)	95% Cu / 5% Sn / P	Spring-temper, fatigue resist	Connectors, springs, washers
C544 (Phosphor Bronze, free-cutting)	88% Cu / 4% Sn / 4% Zn / 4% Pb	Machinable bronze	Bushings, fasteners
C932 (Bearing Bronze)	83% Cu / 7% Sn / 7% Pb / 3% Zn	Common bearing-alloy candidate	Sleeve bearings, bushings, gears
C954 (Aluminum Bronze)	85% Cu / 11% Al / 4% Fe	Strength and wear-resistance candidate	Marine hardware, valve seats

C70600 is a copper-nickel alloy, not a bronze. It is included in the marine comparison because it is used in heat exchangers and condensers. CDA specifies 9.0-11.0% nickel and 1.0-1.8% iron, with copper as the remainder; check the full specification for other element limits.

Bronze key properties

Property	C510 (Phosphor)	C932 (Bearing)	C954 (Aluminum)
Density	8.86 g/cm³	8.91 g/cm³	7.45 g/cm³
Tensile strength	345-690 MPa	240-310 MPa	620-690 MPa
Hardness (HB)	75-95	60-70	170-180
Machinability rating	20%	70%	40%
Color	Golden-brown	Dark brown	Yellow-brown

Mechanical values depend on product form, temper, casting route and test conditions. Friction is not a fixed alloy property: CDA’s bronze-bearing selection guide requires the load, speed, shaft and lubrication regime to be considered together. Do not use a generic friction coefficient to release a bearing design.

When to specify bronze

• Sliding bearings and bushings — C93200 is a common candidate when load, speed and lubrication requirements support it
• High-fatigue applications — C510 phosphor bronze for springs, electrical connectors
• Heavy-duty marine hardware — C954 aluminum bronze for propellers, valve bodies
• Heat exchangers in seawater — C70600 cupronickel resists biofouling
• Architectural elements with controlled appearance — specify the approved bronze or brass grade, exposure, finish and appearance-acceptance criteria rather than assuming a particular patina.

The Real-World Trade-off Matrix

Picking between the three families comes down to which two properties matter most for your application:

Priority 1 →	Conductivity	Machinability	Cost	Wear Resist	Marine Resist	Aesthetics
Conductivity	C110	C110	C260	(mismatch)	C70600	C110
Machinability	C110	C360	C360	C544	C464	C360
Cost	C260	C360	C260	(mismatch)	C464	C385
Wear resistance	(mismatch)	C544	(mismatch)	C932	C954	C385
Marine resistance	C70600	C464	C464	C954	C70600	C385
Aesthetics	C110	C360	C385	C385	C385	C385

Read each intersection as a candidate for further review, not a best-alloy determination. The matrix does not establish a lowest price, corrosion rating, bearing limit or approved substitution; check the exact grade, form and operating conditions before selection.

How to Compare Current Cost

A static price table is unreliable because copper-family quotations vary with metal index, alloy surcharge, product form, temper, thickness, finish, quantity, mill source and quotation date. C932 cast bearing stock, C260 sheet and C360 bar are also different products; comparing only their price per kilogram hides yield and processing cost.

For a usable comparison, ask suppliers to quote the same:

• UNS designation, temper and applicable material specification
• sheet, strip, bar, tube or casting form
• dimensions, tolerances and finish
• certificate and lot-traceability scope
• net quantity, machining or forming route and expected scrap
• quotation validity and any metal-index adjustment

Separate raw material from conversion cost. A more expensive alloy may machine more efficiently, while a lower raw-material price can be offset by poor yield, slower cutting or an unsuitable product form.

Build a like-for-like copper, brass and bronze quote comparison

Use the same released geometry for every technically acceptable option, then ask each supplier to separate the following commercial inputs:

Quote line	Keep constant or identify explicitly	Why the comparison can otherwise mislead
Alloy and temper	Exact UNS grade, product form, temper and material certificate	C110 sheet, C360 bar and C932 casting are not interchangeable purchasing units.
Blank quantity and yield	Finished quantity, nesting or bar cutoff, and buyer-approved scrap assumptions	A low material price can still produce a higher finished-part material charge.
Conversion scope	Cutting, bending, stamping, machining, joining and agreed inspection	A material comparison is not valid when the fabrication route changes silently.
Finish and packaging	Plating, protected contact areas, cleanliness and approved packing method	Surface treatment and handling may dominate the useful comparison.
Quote basis	Currency, validity date, freight term and any metal-index adjustment	Market movement and delivery responsibility can change the apparent ranking.

Use copper busbar manufacturing for released conductive-part RFQs and phosphor bronze stamping and forming for approved spring-contact or formed-strip programs. A material-selection article should not be treated as the commercial owner of either manufacturing intent.

For deeper material decision framework, see our carbon vs stainless steel comparison and 304 vs 316 stainless guide.

Machinability and Fabrication Notes

Copper-family alloys behave very differently in the machine shop:

Process	Copper (C110)	Brass (C360)	Bronze (C932)
CNC turning	Difficult (gummy, sticks to tool)	Excellent (chips break cleanly)	Good (chips control needed)
Laser cutting	Qualify the machine, grade and thickness	Qualify the actual product form and cutting process; no universal power threshold	Cast bearing stock is not a substitute for a sheet-cutting grade
Punching	Form and temper must suit the operation	C36000 has fair cold-working capacity; do not inherit C26000 sheet-forming assumptions	Cast bearing alloy; do not assume a sheet-punching route
Press brake forming	Review form, temper and bend radius	C26000 sheet and C36000 stock require separate forming reviews	Cast bearing alloy; not a default press-brake material
TIG / gas-shielded arc welding	CDA rates C11000 as fair; oxygen-free and deoxidized grades differ	CDA rates C36000 gas-shielded arc welding as not recommended	CDA rates C93200 gas-shielded arc welding as not recommended
Soldering	Excellent	Excellent	Good
Plating	Excellent	Excellent (C260 best)	Good (variable by grade)

Key insight: C360 is the reference alloy for the common copper-alloy machinability rating system. That rating is useful within its stated comparison system, but it is not a universal cycle-time multiplier against aluminum, steel or stainless. Part geometry, tool, machine and required finish still control the actual process.

The fabrication cautions above follow the CDA records for C11000, C36000 and cast C93200. A copper-family label is not enough to transfer a joining or forming rating between them.

For more on cutting and forming, see our fiber vs CO2 laser cutting comparison, K-factor for copper guide and press brake bending defects guide.

Common Specification Mistakes

Mistake 1: “Just use brass” without specifying grade

Specifying only “brass valve body” allows different suppliers to choose different grades. C360 may be unsuitable where the program has:

• Hot water + chlorides (dezincification)
• High-stress fatigue (lead reduces toughness)
• USA potable water (applicable lead-content and leaching requirements for the finished component)

Fix: Specify by exact UNS grade based on application requirements.

Mistake 2: Brass where bronze is required

The generic note “copper alloy bushing” does not define bearing load, speed, lubrication, shaft material, temperature or permitted wear. C360 brass and C932 bearing bronze are not interchangeable by name alone, and neither should be approved without the bearing design inputs.

Fix: For a sliding-contact or bearing application, calculate the service conditions and select the grade with the bearing designer. C932 is a common candidate, not an automatic default.

Mistake 3: Pure copper for structural parts

C110 strength depends strongly on temper and product form. It should not be selected for a structural duty from a conductivity table alone.

Fix: State the structural loads and required temper, then verify strength, joints and deflection for the exact alloy and form.

Mistake 4: Forgetting about dezincification

Susceptible brass can suffer dezincification in some water-service conditions: zinc is selectively removed, leaving a weakened copper-rich structure. Chemistry, temperature, flow and alloy composition affect the risk.

Fix: Define the corrosion test or service-performance requirement and have the designer approve the exact grade. C46400 is uninhibited naval brass; neither that name nor a generic “lead-free brass” designation proves suitability for the exposure.

Mistake 5: Hydrogen embrittlement in C110

Oxygen-bearing C11000 can suffer hydrogen embrittlement during high-temperature exposure to hydrogen-containing or reducing atmospheres. Hydrogen reacts with oxygen in the material and can create internal damage. The actual joining process and atmosphere matter; a single temperature threshold is not a process-acceptance rule.

Fix: Review an appropriate oxygen-free or deoxidized copper grade and the joining procedure together. CDA’s soldering and brazing guide discusses these alternatives. Confirm conductivity and other functional requirements before substituting C10100, C10200 or C12200; they are not equivalent specifications.

Application Decision Tree

Use this tree to identify candidates for an engineering review. It does not approve a material substitution or establish service suitability.

Need maximum electrical/thermal conductivity?
  → YES: Copper (C110 for general, C101 for vacuum/cryogenic)
  → NO: Continue below

Need maximum machinability for CNC volume production?
  → YES: Brass C360 (unless lead-restricted)
  → NO: Continue below

Application has sliding wear or bearing contact?
  → YES: Evaluate C93200 against load, speed, shaft and lubrication requirements
  → NO: Continue below

Marine / saltwater exposure?
  → YES: Evaluate the specific duty before considering C95400 or C70600
  → NO: Continue below

Decorative / architectural / hot-formed?
  → YES: Brass C385 (develops attractive patina over time)
  → NO: Continue below

Spring or fatigue application?
  → YES: Phosphor Bronze C510

No functional priority resolved?
  → Do not default by family name; define conductivity, strength, corrosion, wear, forming and regulatory requirements first.

What to Include in a Copper-Alloy RFQ

Provide the controlled CAD and drawing together with:

• full UNS grade and temper
• material specification and permitted equivalents
• product form, thickness and dimensional tolerances
• conductivity, hardness or mechanical requirements where functional
• lead, potable-water or other regulatory restrictions
• service fluid, temperature, wear and corrosion conditions
• surface finish, plating and protected-area requirements
• certificate, lot traceability and positive material identification scope

The fabrication method and inspection plan can then be confirmed against the actual alloy and geometry. See our copper material services, brass material services, bronze material services and services portfolio.

Bottom Line

There is no durable answer to which family costs more. Build a like-for-like comparison using the exact UNS grade, product form, temper, dimensions, quantity, fabrication scope, delivery basis and quote date.

“Copper alloys” is useful shorthand but an incomplete production specification. Notes such as “brass valve” or “bronze bushing” leave composition, temper, form and verification open to interpretation.

Use the alloy comparison to shortlist candidates, then release the exact UNS grade, temper, governing specification and functional requirements. That makes supplier quotations comparable and gives receiving inspection a defined basis for acceptance.

For RFQs that include copper-family alloys, submit the CAD, drawing and grade requirements for fabrication review. Feasibility, documentation scope and any proposed substitution are confirmed against those inputs before quotation.

Technical Data Sources

• Copper Development Association alloy database - UNS compositions, product forms, properties and applicable specifications
• CDA wrought-copper UNS designations - OFE, OF, DLP and DHP composition limits
• C12200 DHP alloy record and C12000 DLP alloy record - distinct phosphorus-deoxidized copper designations
• C11000 alloy record - ETP copper composition and conductivity context
• C26000 alloy record - cartridge brass forms and applications
• C36000 alloy record - free-cutting brass data
• C51000 alloy record - phosphor-bronze composition, temper-specific properties and forming context
• C93200 alloy record - bearing bronze forms and properties
• C95400 alloy record - aluminum-bronze composition, available product forms and fabrication properties

Use the product specification and revision required by the customer contract. Database values are selection aids, not replacements for certified material records.