What is the difference between H59 brass and H62 brass?

Chemical composition

H59 brass: copper content of 57.0% - 60.0%, zinc is the balance, also contains a small amount of lead (≤ 0.5%), phosphorus (≤ 0.01%), iron (≤ 0.3%), antimony (≤ 0.01%), bismuth (≤ 0.003%) and other impurities, the sum of the impurities ≤ 1.0%.

H62 brass: copper content of 60.5% - 63.5%, zinc is the balance, the sum of impurities ≤ 0.5%, its copper content is slightly higher than H59 brass.

Mechanical properties

Strength and hardness

H59 brass: relatively high strength and hardness. Its tensile strength ≥ 294MPa, elongation δ10 ≥ 25%, can withstand greater mechanical stress.

H62 brass: slightly lower strength and hardness, tensile strength σb (MPa): ≥ 315, elongation δ10 (%): ≥ 30. but its good plasticity makes it easy to process molding.

Toughness and ductility

H59 brass: toughness is a little worse, in the impact of a large external force is more likely to break. But in some of the toughness requirements are not high, emphasize the strength of the occasion is more suitable.

H62 brass: good toughness and ductility, in the cold and hot state can well withstand the pressure processing, such as forging, rolling, etc., after processing the parts are not easy to cracks and other defects.

Corrosion resistance

H59 brass: general corrosion resistance, in the atmosphere, fresh water and other environments have a certain degree of corrosion resistance, but in hydrochloric acid, sulfuric acid and other non-oxidizing acids, corrosion resistance is poor.

H62 brass: relatively good corrosion resistance, in some weak acidic or alkaline environment can also maintain good stability, this is because of its high copper content, the protective film formed on the surface of the alloy is relatively more stable.

Application areas

H59 brass: mainly used in machinery manufacturing parts subjected to greater stress, such as bushings, shingles, etc.; in hardware products for the manufacture of high strength requirements of locks, valves, etc.; in the architectural decoration for the production of some of the appearance of less demanding parts, such as some of the architectural hardware.

H62 brass: commonly used in the production of products that require good processing performance and corrosion resistance, such as a variety of decorative hardware accessories, badges, musical instrument parts, etc.; in the electrical field, as a result of its better conductivity and corrosion resistance, is also used to make some terminals and other electrical components.