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Technical Specifications
Product Overview
360 Brass Square Bar is a high-performance free-cutting brass alloy containing lead for enhanced machinability. This copper-zinc alloy offers excellent mechanical properties combined with superior machining characteristics, making it the preferred choice for precision components and high-volume production applications.
Key Features:
- Exceptional machinability with 100% rating (reference standard)
- Excellent corrosion resistance in atmospheric conditions
- Good electrical and thermal conductivity
- Superior surface finish capabilities
- Excellent hot and cold working properties
- Lead content provides self-lubricating properties during machining
Manufacturing Process: Produced through continuous casting and precision drawing/extrusion processes, ensuring consistent dimensional accuracy and superior surface quality throughout the length.
Applications: Precision machined components, automatic screw machine products, electrical connectors, plumbing fittings, decorative hardware, clock and watch components, musical instruments, and general engineering applications requiring excellent machinability.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM B16 Requirement |
|---|---|---|---|---|
| Copper (Cu) | 60.0 | 63.0 | 61.5 | 60.0-63.0 |
| Zinc (Zn) | 35.5 | 38.5 | 36.8 | Remainder |
| Lead (Pb) | 2.5 | 3.7 | 3.0 | 2.5-3.7 |
| Iron (Fe) | - | 0.35 | 0.15 | ≤ 0.35 |
| Aluminum (Al) | - | 0.05 | 0.02 | ≤ 0.05 |
| Tin (Sn) | - | 0.05 | 0.02 | ≤ 0.05 |
| Nickel (Ni) | - | 0.30 | 0.10 | ≤ 0.30 |
| Other Elements | - | 0.50 | 0.25 | ≤ 0.50 |
⚙️ Mechanical Properties
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | 380 MPa min | 415 MPa | ASTM B557 | Room Temp |
| Yield Strength (0.2%) | 240 MPa min | 275 MPa | ASTM B557 | Room Temp |
| Elongation | 15% min | 25% | ASTM B557 | Room Temp |
| Hardness (Brinell) | 110 HB min | 125 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | 75 HRB min | 82 HRB | ASTM E18 | Room Temp |
| Modulus of Elasticity | - | 105 GPa | ASTM E111 | Room Temp |
| Shear Strength | - | 275 MPa | ASTM B565 | Room Temp |
🔬 Physical Properties
| Property | Value | Unit | Temperature | Test Standard |
|---|---|---|---|---|
| Density | 8.50 | g/cm3 | 20¡ãC | ASTM B311 |
| Melting Point | 885-890 | ¡ãC | - | DSC Analysis |
| Thermal Conductivity | 115 | W/m·K | 20¡ãC | ASTM E1461 |
| Specific Heat | 380 | J/kg·K | 20¡ãC | ASTM C351 |
| Linear Expansion | 20.3 | μm/m·K | 20-100¡ãC | ASTM E228 |
| Electrical Conductivity | 26 | %IACS | 20¡ãC | ASTM B193 |
| Electrical Resistivity | 66 | nΩ·m | 20¡ãC | ASTM B193 |
| Magnetic Properties | Non-magnetic | - | Room Temp | Diamagnetic |
📏 Product Specifications
| Specification | Available Range | Standard Size | Custom Available | Tolerance |
|---|---|---|---|---|
| Square Size | 3mm - 150mm | Various | Yes | ±0.1mm |
| Length | 1m - 6m | 3m | Yes | +25mm/-0mm |
| Corner Radius | Sharp - 2mm | Sharp | Yes | ±0.05mm |
| Surface Finish | Mill, Polished, Drawn | Mill | Yes | Ra ≤ 1.6μm |
| Straightness | - | Standard | Precision | 1mm/m max |
| Condition | H02, H04, H06, H08 | H02 | Yes | Per ASTM |
| Standards Compliance | ASTM B16, B124, B455 | B16 | Multiple | Full compliance |
| Machinability Rating | 100% (Reference) | Excellent | - | Free cutting |
| Test Certificate | Mill TC, Chemical Analysis | Mill TC | Yes | Standard |
| Packaging | Bundles, Boxes, Pallets | Bundles | Custom | Export standard |
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Our Advantages in Processing 360 Brass Square Bar
Superior Machining Properties
360 brass offers exceptional machinability with optimal chip formation and clean cutting characteristics, allowing for high-speed machining operations with reduced tool wear and superior surface finish quality. This results in more efficient production cycles and reduced manufacturing costs.
Precise Square Forming
The square bar configuration is manufactured through precise extrusion and drawing processes, ensuring consistent dimensional accuracy and sharp corner definition. This enables tight tolerances and excellent straightness for demanding manufacturing applications.
Versatile Fabrication Options
The material's balanced composition allows for multiple fabrication methods including cutting, drilling, threading, and forming operations. This versatility enables manufacturers to perform complex machining sequences while maintaining dimensional stability throughout the process.
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