Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of C87300 Copper Alloy (UNS C87300) | Silicon Bronze Casting Alloy Supplier in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
Looking for a dependable C87300 High-Leaded Red Brass supplier and manufacturer for high-precision industrial castings, pump components, and valve parts? Xi'an Dongmeng Group Co., Ltd provides high-quality C87300 (SAE 40) cast red brass with excellent machinability, reliable pressure tightness, and stable chemical composition. As a professional C87300 brass foundry and OEM casting factory, we deliver sand-cast, centrifugal-cast, and fully machined components that meet ASTM B584, SAE, JIS, and EN international standards-ideal for global buyers in plumbing systems, hydraulic equipment, chemical processing, and machinery manufacturing.
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C87300 High-Leaded Red Brass (SAE 40)
C87300 High-Leaded Red Brass, also known as SAE 40 under ASTM B584, is a premium cast brass alloy engineered for excellent machinability, strong pressure tightness, and reliable corrosion resistance. With a balanced composition of copper, tin, lead, and zinc, this alloy delivers stable performance in demanding industrial environments. Its high lead content provides superior free-cutting ability, making it ideal for high-precision machining and complex OEM cast components.
C87300 is widely used for pump housings, valve bodies, plumbing components, bearings, bushings, and general industrial castings, where durability, castability, and long service life are essential. The alloy supports multiple casting methods-sand casting, centrifugal casting, and continuous casting-allowing manufacturers to achieve consistent quality and complex geometries with minimal defects.
Engineered for both performance and cost-efficiency, C87300 remains a trusted material for global buyers in the hydraulic, plumbing, machinery, marine, and chemical processing industries. With strong dimensional stability, excellent wear resistance, and reliable corrosion resistance, it delivers long-lasting performance across a wide range of applications.
Specifications (Metric & Imperial)
1. Available Forms & Casting Methods
| Form | Casting Method | Notes |
|---|---|---|
| Round Bar | Continuous / Centrifugal Casting | Machining-grade quality |
| Hollow Bar | Centrifugal Casting | For bushings & bearings |
| Custom Castings | Sand Casting | Complex shapes / OEM parts |
| Plates / Blocks | Sand / Continuous Casting | CNC-ready material |
2. Size Range (Metric & Imperial)
Round Bar
| Parameter | Metric | Imperial |
|---|---|---|
| Diameter Range | 20–500 mm | 0.79"–20" |
| Length | 100–3000 mm | 4"–118" |
Hollow Bar
| Parameter | Metric | Imperial |
|---|---|---|
| Outer Diameter (OD) | 50–600 mm | 2"–24" |
| Inner Diameter (ID) | 20–500 mm | 0.79"–20" |
| Wall Thickness | 10–80 mm | 0.39"–3.15" |
Plates / Blocks
| Parameter | Metric | Imperial |
|---|---|---|
| Thickness | 20–200 mm | 0.79"–8" |
| Width | 100–1200 mm | 4"–47" |
| Length | 100–2000 mm | 4"–79" |
3. Dimensional Tolerances
Continuous / Centrifugal Cast Bars
| Parameter | Tolerance (Metric) | Tolerance (Imperial) |
|---|---|---|
| OD | ±0.3–0.8 mm | ±0.012"–0.032" |
| ID | ±0.4–1.0 mm | ±0.016"–0.040" |
| Wall Thickness | ±0.5 mm | ±0.02" |
| Straightness | ≤ 2 mm / meter | ≤ 0.024" per ft |
Sand Castings
| Parameter | ASTM Casting Tolerance | Notes |
|---|---|---|
| General Dimensions | CT8–CT12 | Based on ISO 8062 |
| Machining Allowance | 2–6 mm | Dependent on part size |
4. Surface Finish
| Form | Roughness (Ra) |
|---|---|
| Continuous Cast Bar | 3.2–6.3 μm |
| Centrifugal Cast Tube | 6.3–12.5 μm |
| Sand Casting | 12.5–25 μm |
5. Reference Weight (Density 8.7 g/cm³)
Round Bar (Weight ≈ 0.00684 × Diameter² × Length mm)
Examples:
| Diameter | Weight per Meter (Approx.) |
|---|---|
| Ø50 mm | 17.1 kg/m |
| Ø100 mm | 68.4 kg/m |
| Ø200 mm | 273.6 kg/m |
| Ø300 mm | 615.6 kg/m |
Chemical Composition (Typical %)
| Element | Content (%) |
|---|---|
| Copper (Cu) | 80.0 – 85.0 |
| Lead (Pb) | 5.0 – 9.0 |
| Tin (Sn) | 4.0 – 6.0 |
| Zinc (Zn) | Balance |
| Iron (Fe) | ≤ 0.20 |
| Others | ≤ 0.5 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 240 – 310 MPa |
| Yield Strength | 90 – 150 MPa |
| Elongation | 18 – 30% |
| Brinell Hardness | 60 – 80 HB |
| Density | 8.7 g/cm³ |
Key Features of C87300
Excellent machinability due to high lead content
Good corrosion resistance in water, mild chemicals, seawater
High casting performance suitable for complex shapes
Good pressure tightness for pumps & valve components
Stable mechanical strength for long-term service
Cost-effective for medium-stress industrial components
Low friction characteristics ideal for wear parts
Products Applications
C87300 is widely used across industries that require pressure-tight castings, excellent machinability, and durable corrosion resistance. Typical application areas include:
1. Pump & Fluid Handling Systems
Pump housings
Impellers and volutes
Pressure-tight pump components
Water, oil, and coolant circulation systems
2. Valve Manufacturing
Valve bodies
Bonnet and cover parts
Valve seats, stems, and trim components
Plumbing and HVAC valves
3. Bearings & Motion Components
Bushings and sleeve bearings
Wear plates
Low-friction sliding components
Anti-seize mechanical parts
4. Plumbing & Sanitary Hardware
Pipe fittings
Elbow, tee, and connector parts
Meter components
Industrial and residential plumbing systems
5. Machinery & Industrial Equipment
OEM castings for general machinery
Hydraulic system parts
Gear housings
Structural support components
6. Marine & Offshore
Seawater-resistant components
Pump and valve parts for shipbuilding
Corrosion-resistant fittings
7. Decorative & Architectural Hardware
Artistic castings
Handles, knobs, and fixtures
Building hardware requiring good appearance and castability
Why C87300 Outperforms Standard Bronze Alloys (Engineering Comparison)
In real engineering applications, material selection is not only about strength - it is about performance stability under corrosion, load, and long-term wear conditions.
📊 C87300 vs Other Common Copper Alloys
| Property | C87300 Silicon Bronze | C93200 Bearing Bronze | C36000 Free Cutting Brass |
|---|---|---|---|
| Strength | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐ |
| Corrosion Resistance | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐ |
| Wear Resistance | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐ |
| Machinability | ⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Marine Suitability | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐ |
👉 Key conclusion:
C87300 Copper Alloy is the best-balanced solution for marine + structural + corrosion environments, while brass is mainly suitable for machining and low-stress components.
Why C87300 Is Widely Used in Marine Engineering
Marine environments are extremely aggressive due to:
Saltwater chloride corrosion
High humidity exposure
Continuous mechanical stress
Biofouling and erosion
C87300 is preferred because it forms a stable protective oxide film that slows down corrosion over time.
✔ Typical marine advantages:
No rapid dezincification (unlike brass)
Stable performance in seawater immersion
Long service life with minimal maintenance
Reduced failure risk in offshore systems
Engineering Design Considerations (Very Important for Buyers)
When selecting C87300 Copper Alloy, engineers usually evaluate:
1. Load Type
Static load → excellent performance
Dynamic load → stable fatigue resistance
2. Friction Conditions
Dry friction → moderate wear resistance
Lubricated systems → excellent performance
3. Corrosion Exposure Level
Fresh water → excellent
Seawater → outstanding
Chemical exposure → good (non-acidic environments)
Manufacturing & Processing Capability
We supply C87300 in both semi-finished and finished engineering states:
🔩 Processing options:
Sand casting
Investment casting
Continuous casting
CNC machining
Forging (limited applications)
🔧 Secondary processing:
Drilling
Turning
Milling
Thread cutting
Surface polishing
👉 This makes it suitable for both OEM production and direct engineering replacement parts.
Metallurgical Characteristics
C87300 Copper Alloy is classified as a α-phase silicon bronze alloy, which means:
Stable single-phase structure
No brittle intermetallic instability under normal conditions
Uniform grain distribution
Improved fatigue resistance compared to zinc brass alloys
👉 This is why it performs better in load-bearing and rotating components.
Common Failure Issues It Solves
Many buyers switch to C87300 after experiencing problems like:
❌ Brass failure issues:
Dezincification in seawater
Cracking under stress corrosion
Rapid wear in moving parts
❌ Low-grade bronze issues:
Porosity in castings
Poor dimensional stability
Short service life
✔ C87300 solution:
Stable microstructure
Better corrosion resistance
Longer lifecycle under harsh conditions
Engineering Procurement Advantage
Choosing the right supplier is as important as choosing the material.
We provide:
Material traceability reports
Chemical + mechanical test certificates
Stable batch-to-batch consistency
Fast production scheduling
Technical consultation for engineering selection
👉 This ensures your project avoids material mismatch or premature failure risks.
Inspection & Quality Assurance - C87300 High-Leaded Red Brass
To guarantee consistent quality, reliability, and compliance with international standards, all C87300 castings and bars undergo a complete inspection and quality assurance process. Our QA workflow follows ASTM B584, SAE 40, EN cast brass standards, ensuring every batch meets strict mechanical and dimensional requirements.
1. Raw Material Control
Certified electrolytic copper, zinc, tin, and lead
Supplier material certificates (MTC) verified before use
Strict control of alloying additions for stable chemistry
2. Chemical Composition Analysis
Spectrometer testing before casting
Final composition verification after casting
Heat number traceability for every batch
Compliance with ASTM, SAE, and EN limits
3. Casting Quality Inspection
Molten metal filtration & slag removal
Sand casting and centrifugal casting process monitoring
Temperature control to prevent porosity and shrinkage
Process logs documented for each production lot
4. Mechanical Property Testing
Tensile strength, yield strength, elongation
Brinell hardness (HB) testing
Impact and microstructure evaluation (on request)
5. Dimensional & Machining Inspection
CMM (Coordinate Measuring Machine) measurement
OD/ID and wall thickness check for bars & tubes
Tolerance inspection according to drawings
Surface roughness measurement
6. NDT (Non-Destructive Testing)
Ultrasonic testing for internal soundness
X-ray inspection for sand castings with complex geometry
Dye penetrant testing for surface defects
Hydrostatic pressure test for pump & valve components
7. Final Quality Validation
Visual inspection for cracks, porosity, inclusions
Packaging inspection before shipment
Third-party inspections (SGS / TUV / BV) available
Full inspection reports provided upon request
Product Delivery Standards - C87300 High-Leaded Red Brass
We ensure every shipment of C87300 alloy meets strict export, packaging, and delivery requirements to guarantee safe, damage-free arrival and full compliance with international buyer expectations.
1. Packaging Standards
Standard seaworthy export packaging
Strong fumigation-free wooden cases or pallets
Anti-rust oil coating and moisture-proof film wrapping
Layer-by-layer protection to prevent impact or abrasion
Customized packaging available for OEM components
2. Labeling & Traceability
Heat number & batch number marked on each package
Material grade, size, casting method, and order reference
QR-coded label for digital traceability (optional)
Inspection certificate included in each shipment
3. Delivery Conditions
Supply conditions: as-cast, rough-machined, or finished-machined per drawing
Dimensional tolerances per ASTM / EN / OEM requirements
Surface finish per casting method and machining specifications
4. Export Documentation
Mill Test Certificate (EN 10204 3.1)
Packing list, invoice, HS code, CO (Certificate of Origin)
Third-party inspection reports (SGS / BV / TUV) if required
Export fumigation and customs documents available
5. Shipment Options
Sea freight (FCL / LCL)
Air freight for urgent orders
Courier delivery for sample pieces
FOB / CIF / CFR / DDP terms available internationally
6. Lead Time
Casting production: 15–25 days
Machined OEM parts: 20–35 days
Urgent order scheduling available upon request
Xi'an Dongmeng Group Co., Ltd
• Industrial copper alloy manufacturer & exporter
• OEM casting & machining service
• Fast quotation within 12 hours
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
FAQ
1. Can you provide OEM casting and machining services for C87300?
Yes. We offer sand casting, centrifugal casting, and precision machining based on your drawings. OEM customization is fully supported.
2. What is the minimum order quantity (MOQ)?
For cast bars or standard forms: 200 kg per batch
For machined parts: 50 pcs per order
Flexible MOQ available for sample orders.
3. Do you meet ASTM B584, SAE 40, and EN standards?
Absolutely. Every batch is analyzed to ensure full compliance with ASTM B584, SAE 40, JIS, and EN international standards.
4. Can you provide sample pieces for quality testing?
Yes, we provide sample bars or small cast components for inspection and testing before mass production.
5. What is the typical lead time for C87300 orders?
Standard casting: 15–25 days
Machined OEM parts: 20–35 days
Urgent orders can be prioritized upon request.
6. Do you provide material certificates and inspection reports?
Yes. Each shipment includes a Mill Test Certificate (EN 10204 3.1) and inspection report. Third-party inspection (SGS, BV, TUV) is available upon request.
7. Can you assist with material selection for specific applications like pumps or valves?
Yes. Our technical team can recommend the most suitable alloy grade based on operating pressure, temperature, medium, and machining requirements.
8. How is C87300 packaged for international shipping?
C87300 is packed in seaworthy wooden pallets or cases, coated with anti-rust oil, wrapped with moisture-proof film, and labeled for traceability.
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