What is H62 brass?
H62 brass is a copper-zinc alloy, with copper as the primary component (60.5%–63.5%) and zinc comprising the remainder. It is classified as an alpha-beta brass, meaning it contains both the alpha and beta phases of the Cu-Zn solid solution. This dual-phase microstructure provides a balance of strength, ductility, and corrosion resistance, making H62 brass ideal for a wide range of applications.
The "H" in H62 refers to the pinyin initial for "Huang" (meaning yellow in Chinese), while "62" denotes the average copper content. H62 is categorized as a common brass, but it can also be alloyed with trace elements to enhance specific properties.
Equivalent Grades of H62 Brass
| Country/Standard | Standard Designation | Common Name / Description |
|---|---|---|
| China (GB) | H62 | - |
| USA (ASTM/UNS) | C28000 | Muntz Metal (60.0-63.0% Cu) |
| Japan (JIS) | C2800 | Brass 60% |
| European Union (EN) | CuZn40 | CW508N (Numerical Designation) |
| International (ISO) | CuZn40 | - |
| United Kingdom (BS) | CZ109 | - |
| Germany (DIN) | CuZn40 | 2.0360 (Material Number) |
Key Characteristics of H62 Brass:
Copper Content: 62%, providing a more yellow-gold color and slightly enhancing its strength compared to H59 brass.
Zinc Content: Around 36%, which gives the alloy its hardness but at the cost of slightly reducing its overall corrosion resistance.
Lead Content: 2%, which improves machinability and makes it much easier to cut and shape into complex forms.
Corrosion Resistance: While H62 brass provides solid corrosion resistance, it is not as effective in extreme environments, particularly in marine or damp conditions, when compared to H59 brass.
Machinability: A standout feature of H62 brass is its remarkable machinability. The addition of lead allows manufacturers to produce a wide variety of components with high precision and at a faster rate.
Strength: H62 is softer and has lower tensile strength compared to H59 brass, which means it is more suitable for parts that do not require high levels of stress resistance.
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Common Applications of H62 Brass:
Machined Components: H62 is widely used in manufacturing small, intricate parts such as screws, bolts, nuts, and threaded components due to its superior machinability.
Furniture and Decorative Items: Its attractive yellow-gold color and ease of shaping make it ideal for producing decorative fittings, handles, and trim pieces.
Plumbing and Electrical Fittings: It is used in manufacturing various plumbing and electrical components that are not exposed to extremely harsh conditions.
Automotive Components: Parts such as fittings and small mechanical components in the automotive industry are often made using H62 brass due to its combination of ease of machining and acceptable mechanical properties.
Comparison Between H59 And H62 Brass
| Comparison Items | H59 Brass | H62 Brass |
| Differences In Chemical Composition | Copper content is about 57%-60% , zinc content is about 40%-43% | Copper content is about 60.5%-63.5% , zinc content is about 36.5%-39.5% |
| Mechanical Properties | Strength: 500MPa , hardness: higher elongation 10%-20% | Strength: 400-500MPa , hardness: lower elongation 20%-30% |
| Corrosion Resistance | General corrosion resistance, suitable for general environment | Stronger corrosion resistance, adaptable to more complex environments |
| Thermal Conductivity And Electrical Conductivity | Thermal conductivity: 70W/m·K , electrical conductivity: 20%-30%IACS | Thermal conductivity: 120W/m·K , electrical conductivity: 25%-35%IACS |
| Cost Considerations | Low price, suitable for large-scale production | The price is slightly higher, but the overall performance is better, suitable for high-demand applications |
FAQ
| Is H62 brass better than 360 brass? H62 Brass: Offers good strength, ductility, and corrosion resistance, making it suitable for forming and bending operations. 360 Brass: Known for its exceptional machinability due to the added lead, but it is slightly less ductile compared to H62. |
| What is the difference between H65 and H62 brass? H62 brass, with slightly lower copper content, is versatile and widely used in plumbing, electrical components, and hardware. In contrast, H65 brass boasts higher tensile strength, better corrosion resistance, and superior machinability, making it ideal for decorative items, musical instruments, and radiator cores. |
| What is the difference between H59 and H62 brass? Their primary differences lie in their composition; H59 contains slightly less copper, making it more malleable but less corrosion-resistant than H62, which contains higher levels of copper for increased durability and environmental resistance. |
| What is H62? H62 is a brass-zinc alloy containing 60.5–63.5% brass. It has good mechanical properties and electrical conductivity. Although cost-effective, it is susceptible to dezincification corrosion, making it suitable mainly for general structural parts. |
| What is the tensile strength of H62 brass? Tensile strength ≥ 330 MPa, elongation ≥ 10% (in the hard state), excellent cold/hot working performance. Suitable for processes such as stamping, drawing, forging, etc. |
| Is H62 brass machinability? Yes, H62 brass has good machinability, but it is not in the top tier of "free-machining" brasses. Its rating is typically around 40% on the industry-standard scale where free-cutting brass C36000 (CZ121/Alloy 360) is rated at 100%. |
| What is H62 brass strip used for? H62 brass strip is widely used in architectural decoration, electrical terminals, heat exchangers, hardware components, and ammunition casings due to its good strength, formability, and corrosion resistance. |
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