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C46500 Naval Brass – Arsenical Copper-Zinc-Tin Alloy
Xi'an Dongmeng Group Co., Ltd. supplies UNS C46500 arsenical naval brass for industrial and marine engineering applications requiring a combination of mechanical strength, fabrication capability, and improved resistance to dezincification.
C46500 is a wrought copper-zinc-tin alloy containing approximately 59–62% copper, 0.50–1.00% tin, and a controlled addition of 0.02–0.06% arsenic. Tin improves the corrosion behavior of naval brass, while arsenic acts as an inhibitor against selective zinc removal in susceptible microstructural regions.
Compared with uninhibited C46400 naval brass, C46500 offers an additional corrosion-control mechanism for applications where dezincification is an important material-selection consideration.
Dongmeng Group supports specification-based sourcing, cut-to-size processing, export packing, and technical coordination for international purchasing teams and OEM projects.
Request a quotation: Send your required product form, dimensions, ASTM specification, temper, quantity, and application details.
Chemical Composition – UNS C46500
| Element | Chemical Symbol | Composition (wt.%) |
| Copper | Cu | 59.00–62.00 |
| Tin | Sn | 0.50–1.00 |
| Arsenic | As | 0.02–0.06 |
| Lead | Pb | 0.20 max. |
| Iron | Fe | 0.10 max. |
| Zinc | Zn | Remainder |
Technical Interpretation
Copper and zinc form the main alloy matrix, while tin contributes to improved corrosion behavior. The arsenic addition is particularly important because it helps inhibit dezincification, a form of selective corrosion that can affect zinc-containing copper alloys.
The composition above identifies UNS C46500; it must not be substituted with aluminum brass composition or described as a lead-free grade.
C46500 Product Standards
| Standard | Product Scope | Application |
| ASTM B171/B171M | Copper-alloy plate and sheet | Pressure vessels, condensers and heat exchangers |
| ASTM B124/B124M | Copper-alloy forging rods, bars and shapes | Stock intended for hot forging |
| UNS C46500 | Alloy designation and composition | Material identification |
ASTM B171/B171M-24 and ASTM B124/B124M-20 both list C46500 within their respective scopes.
Procurement Note
Not every C46500 product form is automatically covered by the same specification. Buyers should identify the required ASTM standard, product form, temper, and acceptance criteria before ordering.
For seamless condenser tubing, ASTM B111/B111M covers other alloys such as C44300 but does not list C46500. ASTM B135/B135M likewise does not list C46500 in its published alloy scope.
C46500 Mechanical Properties
| Temper | Sample Thickness | Tensile Strength (Typical) | Yield Strength (0.5% Extension, Typical) | Elongation (Typical) |
| M20 – As Hot Rolled | 25.4 mm | 379 MPa | 172 MPa | 50% |
| H01 – Quarter Hard | 1.0 mm | 483 MPa | 400 MPa | 17% |
Engineering Notes
The mechanical properties of C46500 depend on thickness, product form, degree of cold work, and annealing condition. Hot-rolled material generally offers greater ductility than more heavily cold-worked material.
For procurement or engineering calculations, the actual mill test results and applicable specification requirements should take precedence over general reference values.
Density is approximately 8.41 g/cm³.
C46500 Product Size Reference
| Product Form | Indicative RFQ Size Range | Supply Notes |
| Plate / Sheet | 1–40 mm thickness | ASTM B171/B171M; cut-to-size on request |
| Round Forging Bar | Diameter 6–120 mm | ASTM B124/B124M where applicable |
| Hexagonal / Square Bar | 10–80 mm | Confirm section and specification |
| Hollow Bar | OD 20–150 mm | Special supply; confirm feasibility |
| Custom Blanks / Forging Stock | By drawing | Technical review required |
All ranges require confirmation of production availability, temper, dimensional tolerance, and minimum order quantity.
Custom Processing Options
Saw cutting and precision cut-to-length
Plate cutting and machining blanks
Surface cleaning and finishing
Dimensional inspection
OEM machining coordination
Export packaging and batch identification
Precision tolerances should be quoted against actual dimensions and manufacturing routes rather than advertised as universal tolerances.
Why Choose UNS C46500 Arsenical Naval Brass?
1. Improved Resistance to Dezincification
The defining advantage of C46500 is its controlled arsenic addition, which helps reduce the tendency of susceptible brass microstructures to lose zinc through selective corrosion.
This makes C46500 an important candidate when corrosion resistance must be evaluated alongside mechanical performance.
2. Tin-Modified Corrosion Behavior
The addition of 0.50–1.00% tin contributes to the improved corrosion characteristics associated with naval brass alloys, particularly compared with ordinary copper-zinc brass.
3. Strength and Formability Balance
C46500 can provide useful strength and ductility in the appropriate wrought condition. Properties vary significantly between hot-rolled, annealed, and cold-worked material, so material temper should be selected according to the intended fabrication process.
4. Suitable for Industrial Fabrication
Depending on the supplied condition, C46500 can be processed into cut plates, forging blanks, and engineered components. Machining, hot working, and any subsequent thermal treatment should be qualified for the selected product.
5. Marine Engineering Material Selection
The combination of copper, zinc, tin, and arsenic makes C46500 relevant to selected marine and seawater-exposed components.
However, final suitability must consider flow conditions, operating temperature, dissolved chemicals, residual stresses, galvanic coupling, and the mechanical loading of the component.
Industrial Applications of C46500 Naval Brass
Marine Equipment and Shipbuilding
C46500 may be considered for selected marine fittings, hardware, backing plates, and fabricated components where resistance to dezincification is relevant to the design.
Pump and Valve Manufacturing
Plate and forging stock can be used as starting material for specially designed pump or valve components, provided pressure, corrosion, and strength requirements are independently verified.
Heat Exchanger and Condenser Equipment
ASTM B171 covers C46500 plate and sheet for equipment-related applications. Buyers should distinguish these flat products from condenser tubing, for which other alloy and product specifications may be required.
Industrial Corrosion-Resistant Components
C46500 may be evaluated for brackets, machined blanks, plates, and mechanical components operating in corrosive industrial environments.
Custom Forged Components
C46500 forging-stock material can support engineering projects where a specified copper alloy, controlled dimensions, and documented chemical composition are required.
C46500 vs C46400 vs C44300
| Parameter | C46500 | C46400 | C44300 |
| Alloy Name | Arsenical Naval Brass | Uninhibited Naval Brass | Arsenical Admiralty Brass |
| Main System | Cu-Zn-Sn-As | Cu-Zn-Sn | Cu-Zn-Sn-As |
| Copper Content | 59–62% | 59–62% | 70–73% |
| Arsenic Addition | 0.02–0.06% | Not specified | 0.02–0.06% |
| Common Application Focus | Corrosion-resistant plate and forging stock | Naval brass bar and plate | Heat-exchanger and condenser tube |
| Applicable Standard Examples | ASTM B171; ASTM B124 | ASTM B21; ASTM B171 | ASTM B111; ASTM B171 |
Material Selection Recommendation
Choose C46500 when arsenic-inhibited naval brass chemistry and a suitable plate or forging-stock specification are required. Consider C46400 for applications specifying conventional naval brass, or C44300 when an applicable Admiralty brass tube specification is needed.
Quality Control and Material Documentation
Dongmeng Group supports project-specific inspection and documentation requirements for C46500 naval brass supply.
Chemical Composition Verification
Material chemistry can be verified through suitable elemental analysis, with particular attention to copper, tin, arsenic, lead, and iron content.
Mechanical Properties Testing
Tensile strength, yield strength, elongation, and hardness can be evaluated according to the applicable specification and agreed product condition.
Dimensional Inspection
Thickness, width, length, diameter, shape, straightness, and surface condition are checked according to the ordered product form and tolerance requirements.
Material Traceability
Heat numbers, batch identification, inspection records, and supplier documentation can be coordinated where required.
Third-Party Inspection
Independent inspection by SGS, TÜV, BV, or other customer-approved organizations can be arranged subject to order requirements and availability.
Material Test Certificates
Mill test certificates and EN 10204 3.1 inspection certificates may be requested where supported by the producing mill and the agreed supply arrangement.
For critical marine projects, inspection requirements should be agreed before production or dispatch.
Why Choose Dongmeng Group?
C46500 Naval Brass Supply for International B2B Buyers
Xi'an Dongmeng Group Co., Ltd. provides industrial copper alloy sourcing and processing support for international buyers, marine equipment manufacturers, metal distributors, and engineering contractors.
Specification-Based Material Sourcing
We help customers define the correct alloy designation, ASTM product specification, material condition, and inspection requirements.
Flexible Processing and Customization
Cut-to-size plate, forging blanks, and other agreed processing services are available for quotation according to project requirements.
Quality and Documentation Support
Chemical verification, dimensional inspection, material certificates, and third-party inspection requirements can be incorporated into purchasing discussions.
Export-Oriented Supply
We support international shipments with protective packing, product identification, shipping documentation, and delivery-term coordination.
Technical Communication
Customers can submit drawings, specifications, material comparisons, or engineering requirements for review before placing an order.
FAQ – C46500 Arsenical Naval Brass
Q1. What is UNS C46500 Naval Brass?
UNS C46500 is an arsenic-containing wrought copper-zinc-tin alloy commonly called arsenical naval brass. It contains 59–62% copper, 0.50–1.00% tin, and 0.02–0.06% arsenic.
Q2. What is the difference between C46500 and C46400?
Both are naval brass alloys with similar copper and tin composition ranges. C46500 contains a specified arsenic addition intended to help inhibit dezincification, whereas C46400 is designated uninhibited naval brass.
Q3. Is C46500 suitable for seawater applications?
C46500 may be suitable for selected marine applications where improved resistance to dezincification is needed. Actual suitability depends on the operating environment, mechanical stresses, temperature, flow conditions, and component design.
Q4. Which ASTM standards cover C46500?
ASTM B171/B171M covers C46500 plate and sheet, while ASTM B124/B124M covers forging rods, bars, and shapes intended for hot forging. The applicable specification must be matched to the product form.
Q5. Is C46500 the same as Admiralty Brass C44300?
No. C46500 and C44300 have different copper-zinc ratios and distinct alloy designations. C44300 is commonly specified for certain condenser and heat-exchanger tubing applications.
Q6. Can C46500 be used for condenser tubes?
C46500 is included in ASTM B171 for plate and sheet, but it is not a listed alloy in ASTM B111 for seamless condenser tubes. Buyers requiring tubing should confirm the appropriate alloy and tube specification.
Q7. Is C46500 lead-free brass?
C46500 should not be marketed as lead-free. Its UNS composition permits up to 0.20% lead. Specific lead restrictions and regulatory requirements must be checked for each project.
Q8. Is C46500 easy to machine?
Machining behavior depends on material condition, cutting parameters, and geometry. It is not equivalent to free-cutting leaded brass such as C36000. Machining procedures should be selected for the actual product condition.
Q9. Can C46500 be welded or brazed?
Joining feasibility depends on component design, alloy condition, filler metal, and required properties. Welding or brazing procedures should be qualified for the intended application rather than assumed to be universally suitable.
Q10. What supply conditions are available?
Available conditions depend on the product specification. ASTM B171 includes hot-rolled and hot-rolled-and-annealed conditions, while ASTM B124 addresses specified forging-stock tempers. The required temper should be identified in the purchase order.
Q11. Can you supply custom dimensions?
Custom sizes, cut-to-length products, and machining blanks can be evaluated against drawings, manufacturing capability, quantities, and required tolerances.
Q12. What information is required for a quotation?
Please provide the alloy designation, ASTM standard, product form, dimensions, temper, total quantity, inspection requirements, and destination country or port. Technical drawings are recommended for custom components.
Request a Quote for C46500 Naval Brass
Looking for C46500 arsenical naval brass plate, forging bar, or custom-cut material for a marine or industrial project?
Contact Xi'an Dongmeng Group Co., Ltd. for material availability, specification review, processing options, inspection documentation, and an export quotation.
Please include in your inquiry:
Material: UNS C46500
Product form: Plate / Sheet / Forging Bar / Custom Blank
Applicable standard: ASTM B171/B171M or ASTM B124/B124M
Dimensions and required tolerances
Temper or delivery condition
Quantity and delivery destination
Inspection, certification, and packaging requirements
Send Your RFQ Today - Get Material and Technical Support for Your Project.
Office Information
Xi'an Dongmeng Group Co., Ltd.
+86 15769214734
WhatsApp:+86 15769214734
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province, China
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