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C36010 is a wrought copper-zinc-lead alloy identified under the Unified Numbering System (UNS).

It belongs to the free-cutting brass family and is primarily selected for applications requiring efficient material removal, reliable chip control and consistent machining performance.

The alloy contains approximately 60–63% copper, 3.1–3.7% lead and zinc as the remaining principal constituent.

Lead is present as a dispersed phase within the brass microstructure. During machining, it facilitates chip separation, helping reduce the formation of long, continuous chips that can interfere with automatic machining processes.

This makes C36010 suitable for manufacturing precision components such as threaded fittings, machined connectors, fasteners, valve components, bushings and instrumentation hardware.

Why Is C36010 Used for Precision Machining?

For industrial manufacturers, material selection directly affects production efficiency, dimensional consistency and machining costs.

C36010 offers several practical advantages:

High Machinability: Supports efficient turning, drilling and other chip-forming processes.

Effective Chip Control: Helps produce shorter chips during automatic machining.

Good Surface Finish Potential: Suitable for precision turning and finishing operations.

Useful Mechanical Strength: Provides a balance of strength and workability for machined components.

Repeatable Material Specification: ASTM B16/B16M establishes requirements for applicable brass rods, bars and shapes.

Versatile Product Forms: Round and hexagonal bars support multiple component designs.

C36010 is particularly suitable for purchasing programs where machining productivity and reliable material identification are important.

 

The chemical composition of UNS C36010 is defined by its copper, lead and zinc content.

Chemical Composition – UNS C36010

Element	Symbol	Composition (wt.%)
Copper	Cu	60.0–63.0
Lead	Pb	3.1–3.7
Zinc	Zn	Remainder
Iron	Fe	≤0.35

Reference: Copper Development Association UNS C36010 alloy data.

Understanding the Composition

Copper (Cu)

Copper forms a principal part of the alloy matrix and contributes to thermal conductivity, electrical conductivity and general material characteristics.

Lead (Pb)

Lead contributes significantly to the alloy's free-machining characteristics.

The specified 3.1–3.7% lead content distinguishes C36010 from the closely related C36000 alloy.

Zinc (Zn)

Zinc is the other principal constituent of the brass matrix and contributes to its mechanical properties and manufacturing characteristics.

Iron (Fe)

Iron is controlled as a minor constituent under the alloy specification.

Chemical Composition Verification

For industrial purchase orders, chemical composition should be verified against the specified UNS alloy designation.

When requested and agreed, material documentation may include:

Heat or batch identification

Chemical analysis results

Elemental composition verification

Material test report

Third-party inspection results

Chemical composition requirements should be confirmed against the applicable edition of ASTM B16/B16M before order approval.

The mechanical performance of C36010 depends on the supplied temper, bar diameter, manufacturing process and applicable material specification.

For this reason, mechanical properties should not be represented by a single universal tensile-strength or hardness value.

Reference Mechanical Properties – H02 Half-Hard Round Bar

The following figures are published reference minimum values for H02 half-hard C36010 round bars.

Bar Diameter	Tensile Strength, Min.	Yield Strength, Min.	Elongation, Min.
1.5–12 mm	395 MPa	170 MPa	7%
>12–25 mm	380 MPa	170 MPa	10%
>25–50 mm	345 MPa	140 MPa	15%
>50–75 mm	310 MPa	105 MPa	20%

These values are engineering references for H02 round-bar material. They do not replace the mechanical property acceptance criteria of the specified ASTM edition. Requirements must be confirmed for the ordered size, form and temper.

Available Material Conditions

Temper	Designation	Characteristics	Typical Selection
Soft Annealed	O60	Lower strength with greater ductility	Components requiring additional forming
Half-Hard	H02	Balanced strength and machinability	General screw-machine and CNC components
Hard	H04	Higher strength with reduced ductility	Selected smaller-section components

Not every temper is available for every product dimension.

For precision component production, the required temper should be clearly stated in the purchase order.

Mechanical Property Selection

When evaluating C36010 brass for an OEM component, buyers should consider the following:

Required tensile strength

Yield or proof-strength requirements

Material hardness

Elongation and forming requirements

Finished component geometry

Operating loads and service conditions

Our team can review these parameters against the specified material form and processing requirements.

C36010 combines the physical characteristics of a copper-based alloy with excellent machining capability.

Property	Reference Value	Unit
Density	Approximately 8.50	g/cm³
Density	Approximately 0.307	lb/in³
Electrical Conductivity	Approximately 26	% IACS
Thermal Conductivity	Approximately 116	W/(m·K)
Thermal Expansion Coefficient	Approximately 20.5 × 10⁻⁶	/K
Elastic Modulus	Approximately 97	GPa
Solidus Temperature	Approximately 888	°C
Liquidus Temperature	Approximately 899	°C

Technical Note: These are representative physical property values rather than guaranteed acceptance limits.

Actual performance may vary with material condition, processing and temperature.

Xi'an Dongmeng Group Co., Ltd. supports the sourcing of C36010 materials in standard machining-stock configurations and custom dimensions.

Final availability depends on production capability, selected temper, order quantity and the required inspection conditions.

Product Forms and Inquiry Dimensions

Product Form	Indicative Inquiry Dimensions	Imperial Equivalent	Primary Application
Round Brass Rod	Ø3–200 mm	Ø0.118–7.874 in	CNC turning and automatic machining
Hexagonal Brass Bar	4–75 mm A/F	0.157–2.953 in A/F	Nuts, fittings and connectors
Square Brass Bar	4–60 mm A/F	0.157–2.362 in A/F	Machined blocks and hardware
Flat Brass Bar	Custom width and thickness	Custom	Precision components
Custom Brass Profiles	Drawing-based	Drawing-based	OEM components
Brass Hollow Sections	Subject to technical review	Custom	Special machining applications

Dimensions are indicative inquiry ranges, not confirmed stock availability. Larger cross-sections and special shapes require individual production and specification review.

Round Brass Bar

Round bars are commonly used for automatic screw machining and precision CNC turning.

Available supply options may include:

Extruded and drawn bar

Straight lengths

Cut-to-length blanks

Bright-drawn surfaces

Special dimensional tolerances

Customized packaging

Hexagonal Brass Bar

Hexagonal brass bars are suitable for components requiring wrench flats or hexagonal external geometry.

Typical products include:

Hexagonal nuts

Threaded connectors

Adapters

Instrument fittings

Brass hardware components

Square and Flat Brass Bar

Square and flat sections can be selected for milled components, machinery parts and specialized industrial hardware.

Dimensional Tolerances

Standard dimensional requirements should follow the applicable ASTM B16/B16M provisions.

Where tighter machining-stock tolerances are necessary, customers may specify:

Required diameter or across-flats tolerance

Straightness requirements

Length tolerance

Surface condition

Edge condition

Special inspection requirements

Precision tolerances such as h9 or h11 may be evaluated for suitable products by agreement; they should not be assumed for every available size or temper.

Important Standard Clarification

ASTM B16/B16M is the principal specification for the applicable C36010 free-cutting brass rods, bars, wire and shapes.

Hollow products or tubes require a separate technical review of the applicable product standard and manufacturing route.

High-Speed CNC Turning

C36010 is designed for efficient screw-machine operations and is well suited to turning processes where chip control is essential.

The lead-containing microstructure helps chips break during cutting, making the material suitable for automatic machining systems.

Potential manufacturing benefits include:

Reduced chip accumulation

Efficient material removal

Less interruption from continuous chips

Consistent turning operations

Good surface finishing capability

Actual machining productivity depends on machine rigidity, tooling, feed rate, cutting speed, coolant and component geometry.

CNC Milling and Drilling

C36010 can also be used for drilled and milled components requiring accurately positioned holes, slots or machined surfaces.

Typical processes include:

CNC milling

Drilling

Reaming

Tapping

Thread cutting

Precision boring

Automatic Screw-Machine Production

C36010 is particularly suitable for automatic screw machines and multi-spindle production systems.

For high-volume manufacturing, buyers should specify bar diameter, straightness, surface condition and dimensional tolerance to improve feeding reliability.

Surface Finish Requirements

A fine machined surface finish may be achieved with appropriate tooling and process control.

For OEM components, customers should provide the required surface roughness, such as Ra 1.6 μm or Ra 0.8 μm, where necessary.

Surface roughness is a machining acceptance requirement and should not be treated as an inherent guaranteed property of the alloy.

C36010 and C36000 belong to the same family of free-cutting copper-zinc-lead alloys.

Both are associated with ASTM B16/B16M applications and are frequently considered for precision machining.

However, their chemical composition requirements are different.

C36010 vs C36000 Comparison

Property	C36010 Brass	C36000 Brass
UNS Designation	C36010	C36000
Alloy Family	Free-Cutting Brass	Free-Cutting Brass
Copper Content	60.0–63.0%	60.0–63.0%
Lead Content	3.1–3.7%	2.5–3.0%
Zinc	Remainder	Remainder
Iron	≤0.35%	≤0.35%
Primary Product Standard	ASTM B16/B16M	ASTM B16/B16M
Main Processing Method	CNC Turning / Screw Machining	CNC Turning / Screw Machining
Typical Forms	Rod / Bar / Shapes	Rod / Bar / Shapes
Main Applications	Precision Machined Parts	Precision Machined Parts

Is C36010 Better Than C36000 for Machining?

Not necessarily in every application.

Both alloys have excellent free-cutting characteristics.

The higher specified lead content of C36010 may influence chip formation and machining behavior, but actual performance depends on material condition, tooling, cutting parameters and component geometry.

C36000 is commonly used as the reference alloy for copper-alloy machinability ratings.

A general machinability rating alone is not sufficient to establish that C36010 will outperform C36000 in every operation.

Can C36010 Replace C36000?

Substitution should be evaluated against:

Customer material specifications

Chemical composition requirements

Component drawings

Mechanical properties

Service environment

Product regulatory requirements

C36010 and C36000 should not be treated as automatically interchangeable UNS grades.

When purchasing under ASTM B16/B16M, the required UNS alloy number should be explicitly stated.

The appropriate manufacturing route depends on the required material geometry and end-use application.

Brass Rod and Bar Production

C36010 machining stock may be produced through suitable combinations of:

Alloy melting and casting

Billet preparation

Hot extrusion

Cold drawing

Straightening

Cutting

Surface finishing

Inspection

The exact manufacturing sequence depends on the supplying mill, product form and specified temper.

Cut-to-Length Brass Stock

Custom cutting can help reduce material preparation work for CNC workshops.

Customers may specify:

Cut length

Length tolerance

Maximum burr allowance

End-face requirements

Packaging quantity

Part identification

OEM Precision Machining

For customers requiring finished brass components rather than raw bars, drawing-based production may be evaluated.

Potential processes include:

CNC turning

CNC milling

Drilling

Threading

Chamfering

Deburring

Polishing

Surface treatment

Machining tolerances, inspection plans and acceptance criteria are established according to the supplied engineering drawing.

C36010 provides useful general corrosion resistance in suitable indoor and atmospheric service conditions.

However, it is primarily selected for machining performance rather than aggressive corrosion resistance.

Suitable Service Considerations

C36010 may be considered for:

Indoor machinery components

General industrial hardware

Dry or controlled environments

Non-potable fluid-handling components where approved

Machined electrical and mechanical connectors

Environmental Limitations

Special care is required when components will be exposed to:

Ammonia-Containing Environments

Copper-zinc alloys may be susceptible to stress-corrosion cracking under certain ammonia-containing conditions.

Chloride-Containing and Aggressive Water Environments

Dezincification and other corrosion mechanisms may occur under unfavorable water chemistry and exposure conditions.

Marine and Seawater Service

C36010 should not be selected for continuous seawater exposure without a specific corrosion engineering assessment.

High-Pressure or Safety-Critical Systems

Material suitability must be confirmed using the applicable component or system design code.

Technical Recommendation

When corrosion resistance is the primary requirement, buyers should evaluate a suitable corrosion-resistant copper alloy rather than selecting C36010 solely because of its machinability.

C36010 free-cutting brass is commonly considered for components requiring efficient precision machining.

CNC Machined Components

Round and hexagonal bars can be machined into custom components used in industrial equipment and machinery.

Typical Products:
Pins, spacers, threaded components, precision bushings and adapters.

Fasteners and Industrial Hardware

C36010 can be used for machined hardware requiring good chip control and consistent dimensional accuracy.

Typical Products:
Nuts, threaded inserts, screws and specialized fastening components.

Electrical and Electronic Components

C36010 may be used for selected machined electrical parts where its electrical performance and lead-containing composition are acceptable.

Typical Products:
Terminal bodies, connector housings and mechanical contact components.

Electrical suitability must be evaluated against the component's conductivity, thermal and regulatory requirements.

Valve and Flow-Control Components

C36010 may be considered for selected non-potable valve and flow-control parts.

Typical Products:
Valve stems, adapters, threaded bodies and mechanical fittings.

Pressure rating, fluid compatibility and applicable regulatory requirements must be reviewed separately.

Instrumentation Hardware

Precision machining characteristics make C36010 suitable for selected instrumentation components.

Typical Products:
Machined connectors, threaded adapters, instrument hardware and mounting components.

Automotive and Machinery Components

C36010 can be used for selected non-safety-critical machined components where its mechanical properties and operating environment are appropriate.

Typical Products:
Bushings, spacers, small hardware and custom turned parts.

Correct material specification is essential when purchasing free-cutting brass for international industrial projects.

Standard / System	Designation	Application
UNS	C36010	Copper alloy identification
ASTM	B16/B16M	Free-cutting brass rods, bars, wire and shapes
ASTM	B601	Copper alloy temper designation practice
EN 10204	3.1	Inspection certificate type, when agreed
Customer Specification	Drawing / Purchase Order	Additional dimensional and inspection requirements

International Grade Comparison

C36010 should not automatically be described as equivalent to common European free-machining brass grades.

Although some European Cu-Zn-Pb alloys have similar applications, their copper and lead limits may differ from UNS C36010.

For international purchasing, cross-standard substitutions should be approved only after reviewing the relevant chemical composition, temper, mechanical properties and application requirements.

Recommended Purchase-Order Material Description

Material: UNS C36010 Free-Cutting Brass

Product: Round / Hexagonal / Square Bar

Specification: ASTM B16/B16M, specified edition

Temper: H02 or as required

Dimensions: According to purchase order

Inspection: Chemical composition, applicable mechanical properties and dimensions

Documentation: Material test report or agreed inspection certificate

This information helps reduce uncertainty during procurement and material acceptance.

Xi'an Dongmeng Group Co., Ltd. supports specification-based material procurement with inspection requirements established before production or shipment.

Chemical Composition Inspection

Chemical analysis is used to verify the copper, lead and other specified elemental limits.

The required analytical method and reporting scope should be agreed with the supplying mill.

Mechanical Property Testing

Depending on the ordered specification and product condition, testing may include:

Tensile strength

Yield or proof strength

Elongation

Rockwell hardness

Mechanical testing requirements should be linked to the applicable material temper and size.

Dimensional Inspection

Inspection may cover:

Bar diameter

Across-flats dimensions

Width and thickness

Length

Straightness

Surface condition

Additional dimensional requirements may be established for precision machining stock.

Surface Quality Inspection

Visual inspection can be used to identify unacceptable:

Surface cracks

Mechanical damage

Severe oxidation

Surface defects

Handling damage

Material Traceability

Where specified, product identification and documentation may include:

UNS alloy designation

Product dimensions

Batch or heat identification

Material condition

Inspection records

Third-Party Inspection

Independent inspection by organizations such as SGS, TÜV or Bureau Veritas may be arranged subject to project requirements and service availability.

Inspection Documentation

Documentation options may include:

Chemical composition reports

Mechanical property reports

Dimensional inspection records

Mill test reports

EN 10204 Type 3.1 inspection certificates, where contractually agreed and available

All requested documentation should be confirmed before order placement.

Packaging and delivery requirements should be selected according to material dimensions, shipment weight and transportation method.

Standard Delivery Options

Item	Delivery Option
Material Forms	Straight bars, rods, profiles and cut pieces
Length	Standard or custom cut
Surface	Mill finish or bright drawn, as ordered
Protection	Moisture-resistant wrapping where required
Bundling	Secured bundles or protected packages
Export Packaging	Wooden cases, pallets or reinforced bundles
Identification	Grade, dimensions, quantity and batch reference
Documentation	Packing list, commercial invoice and agreed material reports
Shipping	Sea freight, air freight or international logistics

Export Packaging Considerations

For polished or precision-drawn bars, additional protective wrapping or separation materials can help reduce surface damage during handling and transportation.

Wooden export packaging should comply with applicable destination-country import requirements.

Custom Delivery Requirements

Buyers may specify:

Maximum bundle weight

Individual bar protection

Custom cutting lengths

Special marking

Batch separation

Moisture-resistant packaging

Project-specific documentation

Production schedules, minimum order quantities and delivery terms are confirmed according to the requested product specification and quantity.

Industrial material procurement involves more than comparing the nominal cost of raw materials.

Material specification, dimensional consistency, documentation, packaging and technical communication can directly influence downstream production efficiency.

Xi'an Dongmeng Group Co., Ltd. supports international buyers with coordinated sourcing and customization services for copper alloy materials.

Specification-Based Material Supply

We help customers define material requirements through UNS designations, ASTM standards, temper conditions and dimensional specifications.

Multiple Brass Product Forms

Our supply services cover round bars, hexagonal bars, square bars and custom material configurations, subject to availability.

Support for Precision Machining Projects

Customers may submit component drawings for material selection, cut-to-length supply or OEM machining evaluation.

Inspection and Documentation Coordination

Inspection requirements and material documentation can be established during quotation and order confirmation.

International B2B Supply

We support industrial distributors, manufacturing companies, engineering buyers and procurement teams requiring export-oriented supply coordination.

Technical Communication

Our team can review material grades, specifications, drawings and delivery requirements before quotation.

Our objective is to help industrial customers obtain correctly specified brass materials that meet their manufacturing and procurement requirements.

For a faster and more accurate quotation, buyers should provide the following information.

RFQ Parameter	Example
Alloy Grade	UNS C36010
Material Standard	ASTM B16/B16M
Product Form	Round Brass Bar
Diameter	20 mm
Length	3000 mm
Temper	H02
Dimensional Tolerance	ASTM or drawing requirement
Surface Condition	Bright Drawn
Quantity	2 Metric Tons
Inspection	Chemical and Mechanical Reports
Packaging	Export Wooden Cases
Destination	Country / Destination Port

Example RFQ

Product: C36010 Free-Cutting Brass Round Bar
Standard: ASTM B16/B16M
Temper: H02
Size: Ø20 mm × 3000 mm
Quantity: 2000 kg
Required Documents: Material Test Report
Delivery: CIF Destination Port

Please provide your required size, quantity, material condition and destination so our sales team can evaluate the available supply options and prepare a quotation.

Q1. What is C36010 free-cutting brass?

C36010 is a copper-zinc-lead alloy used primarily for free-machining applications.

It contains 60.0–63.0% copper and 3.1–3.7% lead, with zinc as the remaining principal constituent.

Its composition supports efficient chip formation during turning and automatic machining.

Q2. What ASTM standard applies to C36010 brass bars?

ASTM B16/B16M is the principal standard covering applicable C36010 free-cutting brass rods, bars, wire and shapes.

The purchase order should specify the required ASTM edition, material form and temper.

Q3. What is the difference between C36010 and C36000 brass?

The main chemical composition difference is the specified lead content.

C36010 contains 3.1–3.7% lead, while C36000 contains 2.5–3.0%.

Both alloys are used for free-machining applications, but they are separate UNS designations.

Q4. Is C36010 brass suitable for CNC machining?

Yes.

C36010 is well suited to CNC turning, automatic screw machining, drilling and other chip-forming operations.

Its lead-containing microstructure contributes to effective chip breaking.

Q5. What forms of C36010 brass are available?

Typical inquiry forms include round rods, hexagonal bars, square bars and custom profiles.

Special shapes and hollow products may be evaluated according to manufacturing availability and the required product standard.

Q6. What is the typical density of C36010 brass?

The approximate density is 8.50 g/cm³, equivalent to approximately 0.307 lb/in³.

This value can be used for preliminary material weight calculations.

Q7. Is C36010 brass suitable for drinking-water applications?

C36010 contains substantial lead and should not be assumed suitable for potable-water-contact components.

Many drinking-water regulations impose strict lead-content requirements, including weighted-average limits for wetted surfaces.

For regulated potable-water applications, buyers should select a material and finished component system specifically qualified for the relevant market.

Q8. Is C36010 brass RoHS compliant?

C36010 contains 3.1–3.7% lead and therefore exceeds the general RoHS restricted-substance concentration limit for lead.

However, EU RoHS Annex III exemption 6(c) provides a conditional exemption for copper alloys containing up to 4% lead by weight.

The currently published exemption expires on June 30, 2027, and includes specific restrictions for certain products accessible to children.

Compliance must be evaluated for the finished product, its application, applicable exemption conditions and relevant legislation.

C36010 should not be marketed as universally RoHS compliant.

Q9. Can C36010 brass be welded or brazed?

Conventional fusion welding is generally not recommended because lead can contribute to welding defects and cracking.

Soldering and brazing may be suitable when an appropriate joining procedure and filler material are selected.

Joining suitability should be verified for the component's service requirements.

Q10. Does C36010 brass resist corrosion?

C36010 offers useful general corrosion resistance in suitable environments.

However, the alloy may be susceptible to dezincification or stress-corrosion cracking under certain conditions.

It should not be selected for aggressive seawater, ammonia-containing or high-risk corrosive service without appropriate engineering evaluation.

Q11. Can you provide custom C36010 brass sizes?

Custom bar dimensions, cut lengths and profiles may be evaluated according to order quantity and available manufacturing capabilities.

Buyers should provide drawings, tolerances and material requirements for technical review.

Q12. What information is required to obtain a C36010 brass quotation?

Please provide the alloy grade, product form, dimensions, temper, quantity, required documentation and delivery destination.

For OEM components, engineering drawings and the required inspection criteria should also be supplied.

C36010 Brass Rods, Hex Bars and Custom Machined Components

Looking for a reliable international supplier of C36010 free-cutting brass?

Xi'an Dongmeng Group Co., Ltd. supports industrial material procurement for CNC machining companies, distributors, OEM manufacturers and engineering projects.

We can evaluate requirements for:

ASTM B16/B16M C36010 Brass Rod

C36010 Round Brass Bar

C36010 Hexagonal Brass Bar

Precision Cutting and Custom Lengths

Drawing-Based OEM Machined Components

Material Inspection and Traceability Documentation

International Export Packaging and Shipping

Send us your material requirements, technical drawing or purchase order specifications.

Our sales team will review the requested product form, dimensions, quantity, inspection requirements and delivery conditions.

Contact Xi'an Dongmeng Group Co., Ltd.

Phone / WhatsApp: +86 15769214734

Email: office@dongmjd.com

Address: Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province, China

Request Technical Specifications | Send Your RFQ | Get a Custom Quotation

Xi'an Dongmeng Group Co., Ltd. – Copper Alloy Materials and Industrial Supply Solutions.

 

 

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