B111 C68700 Aluminium Brass o61 Annealed U Bend Tube Copper Alloy Cold Drawn
B111 C68700 Aluminium Brass o61 Annealed U Bend Tube Copper Alloy Cold Drawn
Overview
B111 C68700 Aluminum Brass Seamless Tube refers to a specific grade of seamless tube made from C68700 Aluminum Brass that meets the ASTM B111 standard. The ASTM B111 standard outlines the requirements for Seamless Copper and Copper-Alloy Condenser and Heat Exchange Tubes, including C68700 (Aluminum Brass), which is commonly used for heat exchangers, condensers, and similar applications where high corrosion resistance and thermal conductivity are crucial.
B111 C68700 Aluminum Brass Seamless Tube is a high-performance material that combines the corrosion resistance of aluminum brass with the mechanical benefits of a seamless construction. Adhering to ASTM B111 specifications, it is ideal for applications that require reliable, durable, and corrosion-resistant tubes, such as heat exchangers, condensers, marine systems, and HVAC equipment. The seamless nature of these tubes provides superior strength, resistance to internal pressure, and smoother internal surfaces, making them particularly suited for high-stress and high-performance environments.
ASTM B111/B111M Standard Specification for Copper and Copper-Alloy Seamless Tubes
| Standard Grade | ASTM B111 C68700 | EN 12451 CuZn20Al2As | DIN 17660/1785 CuZn20Al2 | BS 2871 CZ 110 | JIS H3300 C6870 | GB/T 8890 HAL 77-2 |
| Cu | 76.0-79.0 | 76.0-79.0 | 76.0-79.0 | 76.0-78.0 | 76.0-79.0 | 76.0-79.0 |
| Al | 1.8-2.5 | 1.8-2.3 | 1.8-2.3 | 1.8-2.3 | 1.8-2.5 | 1.8-2.5 |
| Fe | 0.06 max | 0.07 max | 0.07 max | 0.06 max | 0.06 max | 0.06 max |
| Pb | 0.07 max | 0.05 max | 0.07 max | 0.07 max | 0.07 max | 0.03 max |
| Zn | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. |
| As | 0.02-0.10 | 0.02-0.06 | 0.02-0.035 | 0.02-0.06 | 0.02-0.06 | 0.03-0.06 |
| P | - | 0.01 max | 0.01 max | - | - | 0.02 max |
| Mn | - | 0.1 max | 0.1 max | - | - | - |
| Total Impurities | - | 0.3 max | 0.1 max | 0.3 max | - | 0.3 max |
| Condition | O61 | R390 | F39 | M | O | M |
| - | R340 | F34 | TA | - | Y2 | |
| - | - | - | O | - | - | |
| Yield Strength N/mm2 | 125 min | 150 min | 150-230 | - | - | - |
| - | 120 min | 120-180 | - | - | - | |
| - | - | - | - | - | - | |
| Tensile trength N/mm2 | 345 min. | 390 min | - | - | 373 min | 370min |
| - | 340 min | - | - | - | 350 min | |
| - | - | - | - | - | - | |
| Elongation (%) | - | 45 min | 45 min | - | 40 min | 40 min |
| - | 55 min | 55 min | - | - | 50 min | |
| - | - | - | - | - | - | |
| Hardness Hv5 | - | - | - | 150 min | - | - |
| - | - | - | 85-110 | - | - | |
| - | - | - | 75 max | - | - |
| Elements | ||||||
|---|---|---|---|---|---|---|
| Cu(1,2) | Pb | Zn | Fe | Al | As | |
|
(1) Cu value includes Ag.
|
||||||
| Min (%) | 76.0 | 1.8 | 0.02 | |||
| Max (%) | 79.0 | 0.07 | Rem | 0.06 | 2.5 | 0.06 |
| Form | Temper | Temper Code | Tensile Strength (ksi) |
YS-0.5% Ext (ksi) |
Elongation (%) |
Rockwell F scale |
|---|---|---|---|---|---|---|
|
*Measured at room temperature, 68°F (20°C).
|
||||||
| Tube | Nominal Grain Size 0.025 mm | OS025 | 60 Typ | 27 Typ | 55 Typ | 77 Typ |
| Melting Point - Liquidus°F | 1780 |
|---|---|
| Melting Point - Solidus°F | 1710 |
| Densitylb/cu in. at 68°F | 0.301 |
| Specific Gravity | 8.33 |
| Electrical Conductivity% IACS at 68°F | 23 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F | 58 |
| Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) | 10.3 |
| Specific Heat CapacityBtu/ lb /°F at 68°F | 0.09 |
|
Modulus of Elasticity in Tensionksi |
16000 |
|
Modulus of Rigidityksi |
6000 |
| Technique | Suitability |
|---|---|
| Soldering | Fair |
| Brazing | Good |
| Oxyacetylene Welding | Fair |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Good |
| Seam Weld | Fair |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Excellent |
| Capacity for Being Hot Formed | Fair |
| Machinability Rating | 30 |
Applications:
- Aluminum Brass Tube for condenser and heat-exchangers.
- Water Evaporators.
- Boiler Blowdown Heat Exchangers
- Air coolers.
- Gland Steam Condensers.
- Steam Ejector.
- Turbine Oil Coolers.
- Fuel Oil Heaters.
- Compressed Air Inter and After Coolers.
- Ferrules, Oil Well Pump Liner, and Distiller etc.
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