Overview
H62 Brass is one of the most widely used alpha brass alloys in China, containing approximately 60.5–63.5% copper and the balance zinc. It offers an excellent combination of strength, ductility, corrosion resistance, thermal conductivity, electrical conductivity, and formability.
Compared with H59 brass, H62 contains higher copper content, resulting in improved ductility, corrosion resistance, and cold-working performance. It is extensively used in electrical components, plumbing fittings, architectural hardware, decorative products, and precision stamped parts.
H62 brass is widely used in:
- Plumbing Fittings
- Electrical Connectors
- Valves
- Radiator Components
- Decorative Hardware
- Heat Exchanger Parts
- Deep Drawn Components
- Industrial Equipment
Its balance of mechanical performance and processing flexibility makes H62 one of the most versatile brass grades in manufacturing.
Material Specification
| Property | Value |
|---|---|
| Material Designation | H62 Brass |
| Chinese Standard | GB/T 5231 |
| Material Family | Copper-Zinc Brass Alloy |
| Density | 8.44 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) | 60.5–63.5 |
| Zinc (Zn) | Balance |
| Lead (Pb) | ≤0.08 |
| Iron (Fe) | ≤0.15 |
| Impurities | ≤0.50 |
The higher copper content improves corrosion resistance and cold-forming characteristics compared to H59.
Mechanical Properties
Annealed Condition
| Property | Value |
|---|---|
| Tensile Strength | 300–400 MPa |
| Yield Strength | 90–180 MPa |
| Elongation | 35–50% |
| Hardness | 65–100 HB |
| Elastic Modulus | 105 GPa |
Cold Worked Condition
| Property | Value |
|---|---|
| Tensile Strength | 450–650 MPa |
| Yield Strength | 280–500 MPa |
| Hardness | 120–180 HB |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.44 g/cm³ |
| Melting Point | 900–920°C |
| Thermal Conductivity | 112 W/m·K |
| Electrical Conductivity | 25–28% IACS |
| Electrical Resistivity | 0.065 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 |
H62 offers sufficient conductivity for many electrical and connector 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 H62 suitable for heat exchangers and radiator components.
Corrosion Resistance
| Environment | Performance |
|---|---|
| Indoor Environment | Excellent |
| Dry Atmosphere | Excellent |
| Fresh Water | Excellent |
| Marine Atmosphere | Good |
| Salt Water | Moderate |
| Industrial Environment | Good |
H62 provides superior corrosion resistance compared with H59 due to its higher copper content.
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 |
H62 is frequently joined through brazing and soldering processes.
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 |
| H62 Brass | Good |
| H68 Brass | Good |
| C110 Copper | Fair |
H62 is often selected when both machining and forming capabilities are required.
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 most brass alloys, H62 is strengthened through cold work rather than heat treatment.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| GB/T (China) | H62 |
| ASTM (USA) | C28000 (Similar) |
| UNS | C28000 |
| EN (Europe) | CuZn38 |
| DIN (Germany) | CW508L |
| JIS (Japan) | C2720 |
| ISO | CuZn38 |
Available Forms
| Product Type | Availability |
|---|---|
| Round Bar | Yes |
| Hex Bar | Yes |
| Flat Bar | Yes |
| Plate | Yes |
| Sheet | Yes |
| Strip | Yes |
| Tube | Yes |
Typical Applications
Plumbing Industry
- Pipe Fittings
- Valves
- Water Supply Components
- Couplings
Electrical Industry
- Connectors
- Terminals
- Conductive Components
- Switch Hardware
Architectural Industry
- Decorative Hardware
- Door Handles
- Nameplates
- Trim Components
Automotive Industry
- Radiator Components
- Electrical Parts
- Instrument Components
- Decorative Trim
HVAC Industry
- Heat Exchangers
- Condenser Components
- Cooling System Parts
Industrial Manufacturing
- Stamped Components
- Deep Drawn Parts
- Precision Fabrications
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.
Good Strength
Provides a balance of strength and ductility.
Good Corrosion Resistance
Suitable for plumbing and architectural applications.
Attractive Appearance
Natural golden finish suitable for decorative products.
Excellent Fabrication Performance
Supports machining, stamping, brazing, and plating.
Cost Effective
Offers excellent value for industrial production.
Limitations
Lower Strength Than H59
Not ideal for highly loaded mechanical components.
Lower Conductivity Than Pure Copper
Not suitable for high-current electrical systems.
Moderate Marine Resistance
Protective coatings may be required in marine environments.
Limited Wear Resistance
Not intended for severe abrasion applications.
Comparison with Other Brass Grades
| Property | H62 | H59 | H65 | H68 |
|---|---|---|---|---|
| Copper Content | 60.5–63.5% | 57–60% | 63–68% | 67–70% |
| Strength | High | Higher | Moderate | Lower |
| Formability | Excellent | Good | Excellent | Outstanding |
| Corrosion Resistance | Better | Good | Better | Best |
| Conductivity | Higher | Lower | Higher | Highest |
Comparison with Common Materials
| Material | Conductivity | Strength | Formability |
|---|---|---|---|
| H62 Brass | 25–28% IACS | High | Excellent |
| H59 Brass | 24–26% IACS | Higher | Good |
| H68 Brass | 27–28% IACS | Moderate | Outstanding |
| 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 H62 brass?
H62 is a copper-zinc brass alloy containing approximately 60.5–63.5% copper, known for excellent formability and corrosion resistance.
What is H62 brass used for?
Typical applications include:
- Plumbing Fittings
- Valves
- Electrical Connectors
- Heat Exchangers
- Decorative Hardware
What is the equivalent material to H62?
Common equivalents include:
- CuZn38
- CW508L
- C2720
- C28000 (similar)
What is the difference between H62 and H59?
| Property | H62 | H59 |
|---|---|---|
| Copper Content | Higher | Lower |
| Corrosion Resistance | Better | Good |
| Formability | Better | Moderate |
| Strength | Lower | Higher |
Is H62 suitable for stamping?
Yes. H62 has excellent stamping and deep-drawing performance.
Can H62 be machined?
Yes. H62 offers good machinability and is suitable for CNC machining.
Is H62 corrosion resistant?
Yes. H62 performs well in plumbing, industrial, and architectural environments.
Why choose H62 brass?
Because it combines:
- Excellent Formability
- Good Strength
- Good Corrosion Resistance
- Attractive Appearance
- Cost Efficiency
Is H62 suitable for plumbing fittings?
Yes. H62 is one of the most common brass grades used in plumbing systems.
Does GCNOV provide custom manufacturing services for H62 brass?
Yes. GCNOV provides:
- CNC Machining
- Precision Stamping
- Brass Fabrication
- Valve Manufacturing
- Surface Plating
- Prototype Development
- Low-Volume Production
- Mass Production