Overview
H65 Brass is a high-quality copper-zinc alloy containing approximately 63–68% copper and the balance zinc. It offers an excellent combination of strength, ductility, corrosion resistance, electrical conductivity, thermal conductivity, and cold-forming capability.
Compared with H62 brass, H65 contains higher copper content, resulting in improved corrosion resistance, conductivity, and formability. It is widely used in electrical components, decorative hardware, heat exchangers, radiators, plumbing fittings, and precision stamped products.
H65 brass is widely used in:
- Electrical Connectors
- Radiator Components
- Heat Exchanger Parts
- Decorative Hardware
- Plumbing Fittings
- Precision Stampings
- Architectural Components
- Industrial Equipment
Due to its excellent balance between strength and workability, H65 is one of the most versatile brass grades in industrial manufacturing.
Material Specification
| Property | Value |
|---|---|
| Material Designation | H65 Brass |
| Chinese Standard | GB/T 5231 |
| Material Family | Copper-Zinc Brass Alloy |
| Density | 8.46 g/cm³ |
| Magnetic Property | Non-Magnetic |
| Typical Supply Condition | Annealed, Half-Hard, Hard |
| Standard Forms | Rod, Bar, Plate, Sheet, Strip, Tube |
Chemical Composition
| Element | Content (%) |
|---|---|
| Copper (Cu) | 63.0–68.0 |
| Zinc (Zn) | Balance |
| Lead (Pb) | ≤0.03 |
| Iron (Fe) | ≤0.10 |
| Impurities | ≤0.30 |
The higher copper content improves ductility and corrosion resistance while maintaining good strength.
Mechanical Properties
Annealed Condition
| Property | Value |
|---|---|
| Tensile Strength | 290–390 MPa |
| Yield Strength | 80–170 MPa |
| Elongation | 40–55% |
| Hardness | 60–90 HB |
| Elastic Modulus | 105 GPa |
Cold Worked Condition
| Property | Value |
|---|---|
| Tensile Strength | 450–620 MPa |
| Yield Strength | 250–480 MPa |
| Hardness | 120–175 HB |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.46 g/cm³ |
| Melting Point | 900–930°C |
| Thermal Conductivity | 114 W/m·K |
| Electrical Conductivity | 26–27% IACS |
| Electrical Resistivity | 0.064 μΩ·m |
| Thermal Expansion Coefficient | 20.6 × 10⁻⁶/K |
| Specific Heat Capacity | 380 J/kg·K |
Electrical Conductivity
| Material | Conductivity (% IACS) |
|---|---|
| C110 Copper | 100 |
| H68 Brass | 27–28 |
| H65 Brass | 26–27 |
| H62 Brass | 25–28 |
| H59 Brass | 24–26 |
H65 provides reliable conductivity for electrical terminals, connectors, and hardware applications.
Thermal Conductivity
| Material | Thermal Conductivity (W/m·K) |
|---|---|
| C110 Copper | 390 |
| H68 Brass | 116 |
| H65 Brass | 114 |
| H62 Brass | 112 |
| Stainless Steel 304 | 16 |
Its thermal conductivity makes H65 suitable for heat exchangers and cooling system components.
Corrosion Resistance
| Environment | Performance |
|---|---|
| Indoor Environment | Excellent |
| Dry Atmosphere | Excellent |
| Fresh Water | Excellent |
| Marine Atmosphere | Good |
| Salt Water | Moderate |
| Industrial Environment | Good |
The higher copper content gives H65 better corrosion resistance than H62 and H59.
Recommended surface treatments:
- Nickel Plating
- Chrome Plating
- Tin Plating
- Gold Plating
- Electropolishing
- Powder Coating
Weldability
| Welding Process | Rating |
|---|---|
| TIG Welding | Good |
| MIG Welding | Good |
| Resistance Welding | Excellent |
| Brazing | Outstanding |
| Soldering | Outstanding |
H65 is commonly fabricated using brazing and soldering methods.
Machinability
| Process | Rating |
|---|---|
| CNC Turning | Good |
| CNC Milling | Good |
| Drilling | Good |
| Grinding | Good |
| Stamping | Excellent |
| Deep Drawing | Excellent |
Machinability Comparison
| Material | Machinability |
|---|---|
| C360 Brass | Excellent |
| H59 Brass | Excellent |
| H65 Brass | Good |
| H68 Brass | Good |
| C110 Copper | Fair |
H65 is particularly suitable for stamped, formed, and fabricated components.
Heat Treatment
Stress Relief Annealing
| Parameter | Value |
|---|---|
| Temperature | 250–350°C |
| Cooling Method | Air Cool |
Full Annealing
| Parameter | Value |
|---|---|
| Temperature | 500–650°C |
| Cooling Method | Air Cool |
Heat Treatability
| Property | Performance |
|---|---|
| Hardening by Heat Treatment | No |
| Cold Work Strengthening | Yes |
| Annealing Response | Excellent |
Like other alpha brass alloys, H65 is strengthened through cold working.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| GB/T (China) | H65 |
| ASTM (USA) | C27000 (Closest Equivalent) |
| UNS | C27000 |
| EN (Europe) | CuZn35 |
| DIN (Germany) | CW507L |
| JIS (Japan) | C2700 |
| ISO | CuZn35 |
Available Forms
| Product Type | Availability |
|---|---|
| Round Bar | Yes |
| Hex Bar | Yes |
| Flat Bar | Yes |
| Plate | Yes |
| Sheet | Yes |
| Strip | Yes |
| Tube | Yes |
Typical Applications
Electrical Industry
- Electrical Connectors
- Terminals
- Contact Components
- Conductive Hardware
Plumbing Industry
- Valves
- Pipe Fittings
- Water Supply Components
- Couplings
HVAC Industry
- Heat Exchanger Components
- Radiator Parts
- Condenser Components
- Cooling System Hardware
Architectural Industry
- Decorative Trim
- Nameplates
- Door Hardware
- Architectural Panels
Automotive Industry
- Radiator Components
- Electrical Parts
- Decorative Trim
- Instrument Components
Industrial Manufacturing
- Precision Stampings
- Deep Drawn Parts
- Brass Fabrications
- Mechanical Components
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| CNC Machining | Excellent |
| Stamping | Outstanding |
| Deep Drawing | Outstanding |
| Welding | Good |
| Brazing | Outstanding |
| Soldering | Outstanding |
| Electroplating | Excellent |
Advantages
Excellent Formability
Ideal for stamping, bending, and deep-drawing operations.
Good Strength
Offers a balance between strength and ductility.
Superior Corrosion Resistance
Better corrosion resistance than H62 and H59 brass.
Attractive Appearance
Natural golden color suitable for decorative applications.
Excellent Fabrication Performance
Compatible with machining, stamping, brazing, and plating.
Cost Effective
Provides excellent overall value for industrial production.
Limitations
Lower Strength Than H59
Not the best choice for highly stressed mechanical components.
Lower Conductivity Than Pure Copper
Not suitable for high-current electrical applications.
Moderate Wear Resistance
Not recommended for abrasive service conditions.
Limited Marine Resistance
May require protective coatings in marine environments.
Comparison with Other Brass Grades
| Property | H65 | H62 | H59 | H68 |
|---|---|---|---|---|
| Copper Content | 63–68% | 60.5–63.5% | 57–60% | 67–70% |
| Corrosion Resistance | Excellent | Good | Good | Outstanding |
| Formability | Excellent | Excellent | Good | Outstanding |
| Strength | Moderate | High | Highest | Moderate |
| Conductivity | Higher | Good | Lower | Highest |
Comparison with Common Materials
| Material | Conductivity | Strength | Formability |
|---|---|---|---|
| H65 Brass | 26–27% IACS | Good | Excellent |
| H62 Brass | 25–28% IACS | High | Excellent |
| H59 Brass | 24–26% IACS | Highest | Good |
| C110 Copper | 100% IACS | Lower | Excellent |
| Stainless Steel 304 | 2% IACS | High | Good |
Available Surface Finishes
Raw Finishes
- Mill Finish
- Annealed Finish
- Bright Finish
Functional Finishes
- Precision Machined Finish
- Brushed Finish
- Polished Finish
Decorative Finishes
- Nickel Plated
- Chrome Plated
- Gold Plated
- Powder Coated
Frequently Asked Questions (FAQ)
What is H65 brass?
H65 is a copper-zinc brass alloy containing approximately 63–68% copper and offering excellent corrosion resistance and formability.
What is H65 brass used for?
Typical applications include:
- Electrical Connectors
- Radiators
- Heat Exchangers
- Plumbing Fittings
- Decorative Hardware
What is the equivalent material to H65?
Common equivalents include:
- CuZn35
- CW507L
- C27000
- C2700
What is the difference between H65 and H62?
| Property | H65 | H62 |
|---|---|---|
| Copper Content | Higher | Lower |
| Corrosion Resistance | Better | Good |
| Conductivity | Higher | Slightly Lower |
| Strength | Lower | Higher |
Is H65 suitable for stamping?
Yes. H65 offers excellent stamping and deep-drawing performance.
Can H65 be machined?
Yes. H65 provides good machinability and is commonly used for precision fabricated components.
Is H65 corrosion resistant?
Yes. H65 offers excellent resistance to atmospheric and industrial corrosion.
Why choose H65 brass?
Because it combines:
- Excellent Formability
- Good Strength
- Excellent Corrosion Resistance
- Attractive Appearance
- Cost Efficiency
Is H65 suitable for heat exchangers?
Yes. H65 is commonly used for radiator and heat exchanger components.
Does GCNOV provide custom manufacturing services for H65 brass?
Yes. GCNOV provides:
- CNC Machining
- Precision Stamping
- Deep Drawing
- Brass Fabrication
- Surface Plating
- Prototype Development
- Low-Volume Production
- Mass Production