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H62 BRASS

Product introduction

📌 Designation and Standard

Common Name: H62 Brass
Chinese Standard (GB): H62
Unified Numbering System (Digital Code): T27600
Material Type: Copper-Zinc Alloy / Wrought Brass

⚗️ Chemical Composition (by mass)

H62 is a binary (two-element) brass. Its composition is strictly regulated:

Copper (Cu): 60.5% to 63.5%

This is the main alloying element. The "62" in its name refers to the nominal copper content.

Zinc (Zn): Remainder (approximately 36.5% to 39.5%)
Impurities (Total ≤ 0.5%): Includes elements like Iron (Fe), Lead (Pb), Antimony (Sb), and Bismuth (Bi), which are kept to a minimum to ensure performance.

🔬 Microstructure

At room temperature, H62 Brass has a dual-phase structure (α+β').

The α-phase is soft and ductile (like pure copper).
The β'-phase is harder and stronger at room temperature.
This combination of phases gives H62 a good balance of strength and ductility compared to single-phase brasses.

📊 Mechanical Properties

The mechanical properties of H62 are highly dependent on its temper (processing state). It is commonly supplied in various conditions. The values below represent typical ranges:

Property	Typical Value / Range	Condition Notes
Tensile Strength	315 ~ 630 MPa (45,700 ~ 91,400 psi)	Lower values for annealed (soft) state; higher values for cold-worked (hard) state.
Yield Strength	130 ~ 450 MPa (18,900 ~ 65,300 psi)	Significantly increases with cold working (e.g., rolling, drawing).
Elongation	≥10% ~ ≥30%	A measure of ductility. Higher in soft/annealed state, lower in hard/tempered state.
Hardness	89 ~ 180 HV (approx. 50-90 HRB)	Varies greatly with temper.
Density	8.43 ~ 8.5 g/cm³ (0.304 - 0.307 lb/in³)	Constant physical property.

✨ Key Characteristics

Good Combination of Strength and Plasticity: Unlike high-zinc brasses that are very brittle, or high-copper brasses that are very soft, H62 offers a useful middle ground.
Excellent Workability: It has good plasticity for cold working (like bending and deep drawing) and also performs well in hot working processes (like forging).
Good Machinability: While not as free-cutting as leaded brasses (like HPb59-1), H62 machines reasonably well for general purposes.
Corrosion Resistance: It has good resistance to corrosion in atmospheric, fresh water, and some chemical environments.

🛠️ Typical Applications

Due to its balanced properties and relatively low cost, H62 is one of the most widely used brass grades. Common applications include:

Fasteners: Nuts, bolts, screws, rivets.
Hardware Components: Gaskets, bushings, washers, pipe fittings.
Radiator Parts: Tanks and pipes for automotive and industrial cooling systems.
General Engineering: Small structural parts, stampings, and deep-drawn items.

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