Understanding H59 Brass and H62 Brass

Copper can be divided into electrolytic copper and copper alloy, then the copper alloy includes brass, bronze, and white brass (also called copper-nickel, paktong, or cupronickel). Brass is an alloy of copper and zinc; bronze is an alloy of copper and tin; white brass is an alloy of copper and nickel. Brass H62 and H59 are both a kind of copper alloy, as the game suggests, with copper content close to 62% and 59% respectively.

H62 brass refers to a type of ordinary brass with an average copper content of 62%, the "H" in H62 which from GB (Guobiao) standards, represents the first letter of the Pinyin of the Chinese character "Huang", and 62 represents the average content of copper. The ordinary brass added other elements called special brass, which is still represented by "H", followed by the added chemical symbols and their average composition. For example, HAl59-3-2 contains 57%-60% copper, 2.5%-3.5 aluminum, 2%-3% nickel and the remainder is zinc.

H59 brass is the cheapest brass with high strength, high hardness, and poor plasticity. It also can withstand pressure processing under the hot state, its corrosion resistance is average and other properties are similar to H62.

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H62 and H59 are two types of ordinary brass, with similar characteristics, but differ in cost. The H62 is a little more expensive due to the relatively higher copper content. What are other differences between H62 and H59, and which alloy should you choose in different applications?

1. The most significant difference is their copper content and chemical composition.

Composition of H59 Brass:

Copper (Cu): 57 – 60%

Lead (Pb): ≤ 0.5%

Phosphorus (P): ≤ 0.01%

Iron (Fe): ≤ 0.3%

Stibium (Sb): ≤ 0.01%

Bismuth (Bi): ≤ 0.003%

Zinc (Zn): remainder

Impurity: ≤ 1.0%

Composition of H62 Brass:

Copper (Cu): 60.5 – 63.5%

Iron (Fe): ≤ 0.15%

Lead (Pb): ≤ 0.08%

Stibium (Sb): ≤ 0.005%

Bismuth (Bi): ≤ 0.002%

Phosphorus (P): ≤ 0.01%

Zinc (Zn): remainder

Impurity: ≤ 0.5%

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2. Properties

H59 Properties:

Tensile strength σb (MPa): ≥ 294

Elongation δ10 (%): ≥ 25

Hot working temperature: 730 – 820 ℃

Annealing temperature: 600 – 670 ℃

 

H62 Properties:

Tensile strength σb (MPa): ≥ 315

Elongation δ10 (%): ≥ 30

Hot working temperature: 650 – 850 ℃

Annealing temperature: 600 – 670 ℃

 

3. Performance and applications. H59 brass has cheap price and ordinary corrosion resistance, so it is generally used for machine parts, welding parts, hot stamping and hot rolling parts, suitable for electrical appliances, electronics, lighting, hardware, mounting horizontal, switch, gasket, battery contact piece, copper button, watch strap, decorative necklace, bracelet, ring and other brass products. H62 brass has good mechanical properties, good corrosion resistance and better plasticity in hot or cold condition, it is easy to machine, braze and weld, but also easy to produce corrosion cracking, it can be used for parts need to withstand large load and the is a good material for making faucets. Common uses of H62 brass including pin, nut, washer, radiator, sugar industry, shipbuilding industry, paper industry, and other parts.

 

4. Standards

 

Our factory serves as the core base for the precision manufacturing of copper products, integrating advanced equipment, strict quality control, and efficient production capacity. We possess a complete production line covering the entire process from raw material smelting and continuous rolling to precision drawing/cutting, with key equipment including large-tonnage hydraulic stretching machines, high-precision CNC machine tools, and automated surface treatment systems. This enables the large-scale and customized production of a wide range of products such as copper rods, tubes, plates, strips, and wires. The factory strictly adheres to the ISO quality management system and is equipped with testing instruments such as spectrometers and mechanical property testing machines to monitor process parameters and product performance throughout the entire process. Digital production management is achieved through an ERP system and visual dashboards, ensuring timely order delivery. Furthermore, we implement a green manufacturing philosophy, equipped with exhaust gas treatment and scrap recycling systems, committed to providing customers with high-quality and sustainable copper material solutions.

We employ professional and reliable packaging solutions to comprehensively protect the integrity of all types of copper products during long-distance transportation and handling. For copper rods and tubes, we use moisture- and rust-proof materials for wrapping, secured with sturdy wooden crates or steel strapping to prevent bending and deformation. Copper plates and strips are sealed with waterproof paper or plastic film, protected with edge guards, and then fixed on customized wooden pallets or metal racks to avoid surface scratches and moisture. Copper wires are neatly wound on specialized reels, wrapped with moisture- and rust-proof film, and reinforced at the edges. All packaging is designed according to export standards, with clear labeling to ensure the safe delivery of goods to our global customers.

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