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If you are sourcing UNS C46400 Naval Brass plate, tube, rod, bar, or custom marine components, choosing the right supplier can directly impact your project performance. C46400 Naval Brass is widely used in shipbuilding, offshore equipment, and industrial systems because of its excellent resistance to seawater corrosion and long service life. Whether you need C46400 Naval Brass sheet for fabrication, brass tubes for fluid systems, or precision rods and bars for machining, this alloy offers a reliable balance of strength, durability, and workability. Many global buyers prefer C46400 Naval Brass products when standard brass cannot meet harsh environmental requirements.
If you are sourcing a copper alloy for harsh environments, C46400 Naval Brass stands out as a trusted solution. This marine-grade brass alloy offers strong resistance to seawater corrosion and long-term durability under stress. Many engineers and procurement teams choose C46400 Naval Brass for shipbuilding, offshore equipment, and industrial hardware because it delivers reliable performance where standard brass fails.
In this product page, I will walk you through its specifications, properties, applications, and what you should check before placing an order.
Product Name: UNSC46400 Naval Brass
Alias: CuZn36Sn1 / Naval Brass Alloy
Form: Plate / Sheet / Bar / Tube
Standard: ASTM B21 / ASTM B171 / ASTM B111
Application: Marine / Seawater / Shipbuilding / Condenser
Features: Corrosion Resistant / High Strength / Anti-Dezincification
What is UNS C46400 Naval Brass
C46400 Naval Brass is a copper-zinc alloy with a small addition of tin. This composition improves resistance to dezincification and corrosion in marine environments.Naval Brass, internationally known by its UNS C46400 designation, is a high-strength copper-zinc alloy specifically engineered for superior corrosion resistance in marine environments. This alpha-beta brass enhances the standard 60/40 brass (CuZn40) composition with the addition of approximately 1% tin, drastically improving its ability to resist dezincification-a common failure mode in seawater applications. As a result, it is the material of choice for marine hardware, propeller shafts, forgings, and other critical structural components exposed to seawater. Its global acceptance is reflected in its various national standard designations, including CW712R (EN) for Europe, CuZn77Al2 / 2.0510 (DIN) for Germany, C4621 (JIS) for Japan, and ZCuZn77Al2 (GB) for China. While its mechanical properties are comparable to C28000 (Muntz Metal), the tin addition provides marginally higher strength and vastly superior corrosion performance, making it an indispensable alloy for marine engineering.
Copper Alloy UNS C46400 Mechanical Properties
UNS C46400 is a leaded, alpha-beta duplex brass alloyed with ~1% Sn for enhanced corrosion resistance, particularly against dezincification in marine environments. Its mechanical properties are highly dependent on temper.
Typical Room-Temperature Properties (per ASTM B21, B124, B171):
| Form | Temper | Temper Code | Tensile Strength (ksi) |
YS-0.5% Ext (ksi) |
Elongation (%) |
Rockwell B scale | Rockwell 30T scale | Shear Strength (ksi) |
Reduction of Area (%) |
Ultimate Tensile Strength in Shear (ksi) |
Cold Work (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Flat Products | 1/4 Hard | H01 | 70 Typ | 58 Typ | 17 Typ | 75 Typ | 68 Typ | 43 Typ | |||
| As Hot Rolled | M20 | 55 Typ | 25 Typ | 50 Typ | 55 Typ | 55 Typ | 40 Typ | ||||
| Light Anneal | O50 | 60 Typ | 28 Typ | 45 Typ | 58 Typ | 56 Typ | 41 Typ | ||||
| O50 | 62 Typ | 30 Typ | 40 Typ | 60 Typ | 57 Typ | 41 Typ | |||||
| Soft Anneal | O60 | 58 Typ | 25 Typ | 49 Typ | 56 Typ | 55 Typ | 40 Typ | ||||
| Flat Products & Rod | Soft Anneal | O60 | 58 Typ | 25 Typ | 49 Typ | 40 Typ | |||||
| O60 | 56 Typ | 25 Typ | 47 Typ | 60 Typ | 40 Typ | ||||||
| O60 | 57 Typ | 25 Typ | 47 Typ | 60 Typ | 40 Typ | ||||||
| O60 | 58 Typ | 27 Typ | 45 Typ | 60 Typ | 40 Typ | ||||||
| Flat Products, Rod & Bar | 1/4 Hard | H01 | 69 Typ | 46 Typ | 27 Typ | 50 Typ | 43 Typ | 8 | |||
| H01 | 67 Typ | 40 Typ | 35 Typ | 50 Typ | 43 Typ | 8 | |||||
| H01 | 70 Typ | 48 Typ | 25 Typ | 50 Typ | 43 Typ | 10 | |||||
| H01 | 70 Typ | 58 Typ | 17 Typ | 43 Typ | |||||||
| Light Anneal | O50 | 62 Typ | 30 Typ | 40 Typ | 41 Typ | ||||||
| O50 | 63 Typ | 30 Typ | 40 Typ | 55 Typ | 42 Typ | ||||||
| O50 | 60 Typ | 28 Typ | 45 Typ | 41 Typ | |||||||
| O50 | 62 Typ | 28 Typ | 43 Typ | 55 Typ | 42 Typ | ||||||
| O50 | 63 Typ | 30 Typ | 40 Typ | 55 Typ | 42 Typ | ||||||
| Rod | 1/2 Hard | H02 | 75 Typ | 53 Typ | 20 Typ | 82 Typ | 44 Typ | 20 | |||
| H02 | 80 Typ | 57 Typ | 20 Typ | 85 Typ | 45 Typ | 20 | |||||
| 1/4 Hard | H01 | 70 Typ | 48 Typ | 25 Typ | 80 Typ | 43 Typ | 10 | ||||
| H01 | 69 Typ | 46 Typ | 27 Typ | 78 Typ | 43 Typ | 8 | |||||
| H01 | 67 Typ | 40 Typ | 35 Typ | 75 Typ | 43 Typ | 8 | |||||
| Light Anneal | O50 | 63 Typ | 30 Typ | 40 Typ | 60 Typ | 42 Typ | |||||
| O50 | 62 Typ | 28 Typ | 43 Typ | 60 Typ | 42 Typ | ||||||
| O50 | 63 Typ | 30 Typ | 40 Typ | 60 Typ | 42 Typ | ||||||
| Soft Anneal | O60 | 58 Typ | 27 Typ | 45 Typ | 56 Typ | 40 Typ | |||||
| O60 | 56 Typ | 25 Typ | 47 Typ | 55 Typ | 40 Typ | ||||||
| O60 | 57 Typ | 25 Typ | 47 Typ | 55 Typ | 40 Typ | ||||||
| Rod & Bar | 1/2 Hard | H02 | 75 Typ | 53 Typ | 20 Typ | 45 Typ | 44 Typ | 20 | |||
| H02 | 80 Typ | 57 Typ | 20 Typ | 45 Typ | 45 Typ | 20 | |||||
| Tube | Hard Drawn | H80 | 88 Typ | 66 Typ | 18 Typ | 95 Typ | 35 | ||||
| * Measured at room temperature, 68°F (20°C). | |||||||||||
UNS C46400 Chemical Composition
| Element | Content (%) |
|---|---|
| Copper (Cu) | 59.0 – 62.0 |
| Zinc (Zn) | Balance |
| Tin (Sn) | 0.5 – 1.0 |
| Lead (Pb) | ≤ 0.20 |
| Iron (Fe) | ≤ 0.10 |
The tin content plays a key role in extending service life in seawater conditions.
UNS C46400 Naval Brass Additional Key Properties
Modulus of Elasticity (Tension): 110 GPa
Modulus of Rigidity (Shear): 39 GPa
Fatigue Strength (Rotating Beam): ~140 MPa
Machinability: 80% (C36000 = 100%)
Formability Characteristics:
The alloy exhibits excellent hot workability within the range of 650-750°C (1200-1380°F). Its cold workability is fair; it can be cold formed but work-hardens more rapidly and possesses lower ductility than single-phase alpha brasses (e.g., C26000), often necessitating intermediate annealing for severe forming operations.
Its combination of strength, corrosion resistance, and forgeability makes it a standard material for marine hardware, propeller shafts, and high-strength corrosion-resistant components.
Physical Properties AMS 4611, AMS 4612
Melting Point - Liquidus - 1650 F
Melting Point - Solidus - 1630 F
Density - 0.304 lb/in3 at 68 F
Specific Gravity - 8.41
Electrical Resistivity - 39.9 ohms-cmil/ft @ 68 F
Electrical Conductivity - 26 %IACS @ 68 F
Thermal Conductivity - 67.0 Btu · ft/(hr · ft2·oF)at 68F
Coefficient of Thermal Expansion - 11.8 ·10-6 per oF (68-572 F)
Specific Heat Capacity - 0.09 Btu/lb/oF at 68 F
Modulus of Elasticity in Tension - 15000 ksi
Modulus of Rigidity - 5600 ksi
Machinability Rating - 30%
Key Features of C46400 Naval Brass
You want a material that performs consistently. This alloy offers several strong advantages:
Excellent seawater corrosion resistance
Strong anti-dezincification performance
High mechanical strength
Good hot and cold forming ability
Stable performance in humid environments
Attractive golden surface finish
These features make it ideal for both functional and decorative marine applications.
UNS C46400 Naval Brass (International Standard Designations)
These alloys are chemically and mechanically equivalent to UNS C46400, standardized under different national systems.
| Standard | Designation | Equivalent Name / Notes |
|---|---|---|
| ISO | CuZn38Sn1 | The international standard designation. |
| EN (European) | CW712R | The common European material number. |
| DIN (German) | 2.0530 | The Werkstoff number (material number). |
| DIN (German) | CuZn37Sn1 | The chemical designation (slight variation in Zn/Sn). |
| JIS (Japanese) | C4621 | The Japanese Industrial Standard. |
| GB (Chinese) | ZCuZn38Sn1 | Old designation. |
| GB (Chinese) | HSn62-1 | Common Chinese name ( ~62% Cu, ~1% Sn). |
Note on Common Names: This alloy is most frequently called Naval Brass or Navy Brass.
UNS C46400 Naval Brass Dimension
| Product Form | Size Range (Metric) | Size Range (Imperial) | Tolerance | Reference Standard |
|---|---|---|---|---|
| Plate | Thickness: 3 – 50 mmWidth: 500 – 2000 mmLength: 1000 – 6000 mm | 0.12" – 2"20" – 79"40" – 236" | ±0.05 – ±0.30 mm | ASTM B36 / EN 1652 |
| Sheet | Thickness: 0.5 – 3 mmWidth: 500 – 1500 mmLength: 1000 – 3000 mm | 0.02" – 0.12"20" – 60"40" – 120" | ±0.02 – ±0.05 mm | ASTM B36 / EN 1652 |
| Coil | Thickness: 0.2 – 3 mmWidth: 200 – 1500 mm | 0.008" – 0.12"8" – 60" | ±0.02 – ±0.05 mm | ASTM B36 / EN 1652 |
| Strip | Thickness: 0.1 – 2 mmWidth: 10 – 600 mm | 0.004" – 0.08"0.4" – 24" | ±0.01 – ±0.03 mm | ASTM B36 / EN 1652 |
| Tube / Pipe | OD: 6 – 200 mmWT: 1 – 20 mmLength: 1000 – 6000 mm | 0.25" – 8"0.04" – 0.8"40" – 236" | ±0.05 – ±0.20 mm | ASTM B111 / EN 12451 |
| Rod / Bar (Round) | Diameter: 5 – 300 mmLength: 1000 – 6000 mm | 0.2" – 12"40" – 236" | h9 / h11 | ASTM B21 |
| Flat Bar | Thickness: 3 – 60 mmWidth: 20 – 300 mm | 0.12" – 2.4"0.8" – 12" | ±0.05 – ±0.20 mm | ASTM B21 |
| Square Bar | 5 × 5 – 200 × 200 mm | 0.2" × 0.2" – 8" × 8" | h11 | ASTM B21 |
| Hex Bar | 5 – 100 mm (across flats) | 0.2" – 4" | h11 | ASTM B21 |
Reference Standards Explanation:
ASTM B36
Covers brass plate, sheet, strip, and rolled products. Defines thickness tolerance, flatness, and dimensional accuracy.
ASTM B21
Covers brass rod, bar, and shapes. Defines diameter tolerance, straightness, and mechanical properties.
ASTM B111
Covers seamless copper and brass tubes for condenser and heat exchanger applications.
EN 1652 / EN 12451
European standards for copper alloy flat and tubular products, including tolerance and delivery conditions.
UNS C46400 Naval Brass Surface Condition Options
Mill finish
Bright finish
Polished surface
Pickled surface
UNS C46400 Naval Brass Custom Manufacturing Capability
We support full customization based on your project:
Precision cutting (laser / CNC)
Tight tolerance control
Custom lengths and widths
Machined components
OEM branding
UNS C46400 Naval Brass Buyer Tips (Important)
Choose plate or bar if machining is required
Select coil or strip for mass production stamping
Confirm tolerance and temper before order
Request MTC + third-party inspection for critical projects
UNS C46400 Naval Brass Standard
| End Product | Specification |
| Bar | AMS 4611, 4612, ASTM B21, FEDERAL QQ-B-639, SAE J463, J461 |
| Bar, Forging | ASTM B124 |
| Bolts | ASTM F468 |
| Forgings, Die | ASTM B283 |
| Nuts | ASTM F467 |
| Plate | FEDERAL QQ-B-639 |
| Plate, Clad | ASTM B432 |
| Plate, Condenser Tube | ASME SB171, ASTM B171 |
| Rod | AMS 4611, 4612, ASTM B21, SAE J463, J461 |
| Rod, Forging | ASTM B124 |
| Screws | ASTM F468 |
| Shapes | ASTM B21 |
| Shapes, Forging | ASTM B124 |
| Sheet | FEDERAL QQ-B-639 |
| Strip | FEDERAL QQ-B-639, SAE J463, J461 |
| Studs | ASTM F468 |
| Wire, Metallizing | MILITARY MIL-W-6712 |
UNS C46400 Naval Brass Fabrication Properties
| Technique | Suitability |
|---|---|
| Soldering | Excellent |
| Brazing | Excellent |
| Oxyacetylene Welding | Good |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Good |
| Seam Weld | Fair |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Fair |
| Capacity for Being Hot Formed | Excellent |
| Forgeability Rating | 90 |
| Machinability Rating | 30 |
Applications of UNS C46400 Naval Brass
C46400 Naval Brass is a high-performance copper-zinc-tin alloy widely used in demanding marine and industrial environments. It is especially valued for its excellent resistance to seawater corrosion, good strength, and long service life.
🔩 Marine Fasteners & Structural Bolting
Manufactured into high-strength bolts, studs, and nuts for shipbuilding and offshore structures, providing long-term corrosion resistance and structural reliability.
⚙️ Pump & Valve Internal Components
Used in valve stems, pump shafts, impellers, and wear rings, where resistance to erosion-corrosion and cavitation is critical.
⚡ Power Plant Cooling Systems
Applied in condenser systems (thermal & nuclear plants) using seawater or brackish water cooling, ensuring long service life and reduced maintenance.
🚢 4. Shipbuilding Industry
C46400 naval brass is extensively used in shipbuilding applications due to its excellent resistance to seawater corrosion.
Typical uses include:
Ship hull components
Marine hardware and fasteners
Seawater piping systems
Structural marine fittings
👉 It performs reliably in continuous saltwater exposure.
🌊 5. Seawater & Marine Engineering Systems
This alloy is ideal for systems that operate in aggressive seawater conditions.
Applications include:
Seawater pumps
Offshore platform components
Marine valves and fittings
Underwater equipment parts
👉 It resists dezincification, making it superior to standard brasses.
🔥 6. Heat Exchangers & Condensers
C46400 is widely used in thermal systems where corrosion resistance and thermal conductivity are required.
Applications include:
Condenser tubes
Heat exchanger components
Cooling systems in power plants
Marine cooling equipment
⚙️ 7. Industrial Pump & Valve Components
Due to its strength and machinability, C46400 is commonly used in mechanical systems.
Applications include:
Pump shafts
Valve stems
Bushings and bearings
Precision machined parts
🛠️ 8. Marine Hardware & Fasteners
Its durability and corrosion resistance make it ideal for small but critical components.
Applications include:
Bolts and nuts
Marine fittings
Propeller components
Deck hardware
⚓ 9. Offshore & Coastal Engineering
C46400 is widely used in offshore environments where materials face constant salt spray and humidity.
Applications include:
Offshore oil and gas equipment
Coastal infrastructure components
Desalination plant parts
Marine construction systems
Comparative Technical Properties of C46400 Naval Brass and Related Copper Alloys
| Property | C46400 Naval Brass (UNS C46400) | C36000 Free-Cutting Brass | C44300 Admiralty Brass | Tin Bronze (Typical C90500) |
|---|---|---|---|---|
| Alloy System | Cu-Zn-Sn | Cu-Zn-Pb | Cu-Zn-As | Cu-Sn |
| ASTM / UNS Designation | ASTM B21 / B171 / B111 | ASTM B16 / B453 | ASTM B111 | ASTM B505 |
| Zinc Equivalent Content | Balanced with Sn addition | High Zn + Pb | Zn with As inhibitor | No Zn |
| Corrosion Resistance (Seawater) | ★★★★★ Excellent (dezincification resistant) | ★★ Poor | ★★★★ Good | ★★★★★ Excellent |
| Dezincification Resistance | Excellent (Sn-stabilized) | Poor | Good | Excellent |
| Tensile Strength (MPa) | 380–550 | 300–450 | 350–500 | 400–650 |
| Yield Strength (MPa) | ≥125 | ~100 | ~120 | ~150 |
| Machinability Index | ~30–40 | ★★★★★ 100 | ~40 | ~20–30 |
| Wear Resistance | Medium | Medium | Medium | High |
| Thermal Conductivity | Good | Good | Good | Moderate |
| Preferred Applications | Marine hardware, seawater systems, shipbuilding, offshore engineering | High-speed machining parts, fittings | Condenser tubes, heat exchangers | Bearings, bushings, heavy-load wear parts |
| Service Environment | Marine / seawater / offshore | Dry industrial environments | Marine cooling systems | High-load mechanical systems |
C46400 Naval Brass (UNS C46400) is a tin-bearing naval brass designed for severe seawater and marine environments. Compared with standard free-cutting brass (C36000) and admiralty brass (C44300), it provides significantly improved dezincification resistance and long-term corrosion stability, making it suitable for shipbuilding, offshore structures, and seawater systems.
Buyer Pain Points & Our Solutions UNS C46400 Naval Brass
Concern: Corrosion failure in marine environments
Solution: Tin-enhanced composition improves seawater resistance
01
Concern: Inconsistent material quality
Solution: Strict chemical and mechanical testing with full reports
02
Concern: Dimensional inaccuracies
Solution: Precision rolling and machining with tight tolerances
03
Concern: Delivery delays
Solution: Stable production capacity and export experience
04
Concern: Certification requirements
Solution: Support for SGS, BV, TUV third-party inspection
05
UNS C46400 Naval Brass Inspection & Quality Assurance
We follow a strict quality control system to ensure every batch meets international standards.
Quality Control Process
Raw material verification
Spectrometer chemical analysis
Mechanical testing
Surface inspection
Dimensional inspection
Final packing inspection
UNS C46400 Naval Brass Product Delivery Standards
We understand the importance of safe delivery in international trade.
Packaging
Export wooden cases
Waterproof wrapping
Anti-corrosion protection
Customized packaging available
Delivery
Standard lead time: 7–25 days
Flexible shipping: FOB / CIF / CFR
Support for bulk and container orders
UNS C46400 Naval Brass OEM & Customization Service
We support custom production based on your requirements.
Custom Options
Special sizes and tolerances
Surface treatment
Cutting and machining
Custom packaging
Private labeling
This helps you meet specific project or market needs.
When you source C46400 Naval Brass, you need more than just material-you need a partner who understands quality, consistency, and global delivery. Here is how we support your business:
Reliable Manufacturing Experience
We specialize in copper alloys and marine-grade brass products. Our team understands how C46400 Naval Brass performs in real applications, not just in theory.
Strict Quality Control System
We follow a full inspection process from raw material to final shipment:
Chemical composition analysis
Mechanical property testing
Dimensional inspection
Surface quality checks
You receive mill test certificates with every order.
Competitive Pricing with Consistent Quality
We optimize production and supply chain efficiency. You get:
Stable pricing
No quality fluctuation
Better long-term cost control
UNS C46400 Naval Brass FAQ
Q:1.What is C46400 Naval Brass?
C46400 Naval Brass (UNS C46400) is a tin-bearing copper-zinc alloy designed for marine and seawater environments. It provides excellent resistance to corrosion and dezincification, making it suitable for long-term offshore and shipbuilding applications.
Q:2.What are the main applications of C46400 Naval Brass?
C46400 is widely used in both marine and industrial sectors, including:
Shipbuilding and offshore structures
Seawater piping systems
Heat exchangers and condensers
Marine hardware and fasteners
Pump and valve components
Q:3.What forms can you supply and do you keep stock?
We supply C46400 naval brass in multiple forms:
Plate / Sheet
Round bar / Flat bar
Tube / Pipe
Standard sizes are available in stock, while non-standard dimensions can be produced according to customer requirements.
Q:4.What is your MOQ and can I place a trial order?
MOQ depends on product type:
Standard products: 300–1000 kg
Trial order: accepted for testing or evaluation
We support small trial orders for new customers before bulk purchase.
Q:5.What is the delivery time for C46400 naval brass?
Stock items: 5–10 days
Standard production: 15–30 days
Customized orders: 30–45 days
Exact delivery time depends on specifications and order volume.
Q:6.What standards does C46400 comply with?
C46400 naval brass is manufactured according to international standards:
ASTM B21 (Plate / Sheet / Strip)
ASTM B171 (General copper alloy plate)
ASTM B111 (Tube applications)
UNS C46400 specification
Mill Test Certificate (MTC) is provided with every shipment.
Q:7.How does C46400 compare to C36000 brass?
C46400 offers significantly better corrosion resistance than C36000 brass, especially in seawater environments.
C46400 → Marine, seawater, offshore applications
C36000 → High machinability, industrial machining parts
👉 C46400 is the preferred choice for marine engineering.
Q:8. What quality inspection and documents do you provide?
We provide full quality assurance including:
Mill Test Certificate (EN 10204 3.1)
Chemical composition report
Mechanical property report
Third-party inspection (if required)
Q:9.What payment terms do you accept?
Common payment terms:
T/T (30% deposit, 70% before shipment)
L/C at sight for large orders
Negotiable for long-term cooperation
Q:10.What industries commonly use your C46400 naval brass?
Our materials are supplied to:
Marine engineering companies
Shipbuilding contractors
Heat exchanger manufacturers
Industrial distributors and traders
Q:11.What are the advantages of C46400 compared to standard brass?
Superior seawater corrosion resistance
Excellent anti-dezincification performance
Higher strength and durability than common brass (e.g., C26000)
Better performance in marine and offshore environments
Q:12.What are common buyer concerns and how do you address them?
Corrosion in seawater → Use verified C46400 with tin content control
Size tolerance issues → Strict dimensional inspection before shipment
Weight shortage → 100% weight verification
Delivery delays → Contract-based delivery schedule
C46400 naval brass is a high-performance copper alloy specifically designed for marine environments. As a professional C46400 naval brass supplier, we provide plate, sheet, bar, and tube in ASTM B21, B171, and B111 standards, ensuring excellent corrosion resistance in seawater and long-term durability. C46400 naval brass
UNS C46400 Naval Brass References
ASTM International. ASTM B21 Standard Specification for Naval Brass Rod, Bar, and Shapes.
Copper Development Association. Brass Alloy Data Sheet: Naval Brass C46400.
Davis, J.R. Copper and Copper Alloys. ASM International.
ASM Handbook. Properties and Selection: Nonferrous Alloys.
International Copper Association. Marine Applications of Copper Alloys.
European Committee for Standardization. EN Standards for Copper and Copper Alloys.
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