Aluminium brass tubes C68700
Inhibited Aluminum Brass tubes – C68700 – resists the action of high-velocity salt and blackish water and is commonly used for condenser tubes. The main characteristic of C68700 is its high resistance to impingement attack. Tubes of this alloys are recommended for use in Marine and Land Power Stations, in which cooling water velocities are high.
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Aluminium brass tubes are highly accepted and one of the extensively used material for various industrial applications. This alloy develops a protective film that has self-healing properties. This film is dependent on oxygen, which is dissolved in the water and does not renew itself in polluted or stagnant water. High resistance to corrosion in clean seawater or inland conditions is difficult.
Aluminum Brass tubes resist the action of high-velocity salt and brackish water. The outstanding characteristic of this alloy is its superior resistance to impingement attack.
High strength combined with good general corrosion resistance and low susceptibility to stress corrosion cracking of aluminum brass tubes make it a highly preferred material for load bearing masonry fixings.
In case, the brass tubes are used in hard drawn conditions, or if they have been severely cold worked through bending or swaging in assembly, they should generally be heat treated to ensure freedom from stress corrosion cracking.
Inhibited Aluminum Brass tubes – C68700 – resists the action of high-velocity salt and blackish water and is commonly used for condenser tubes. The main characteristic of C68700 is its high resistance to impingement attack. Tubes of this alloys are recommended for use in Marine and Land Power Stations, in which cooling water velocities are high.
Technical Specifications :
Προσδιορισμός : | ||
Aluminum Brass Tubes |
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Πρότυπο | BS 2871 PART3 | ASTM B 111 | DIN 1785 | NFA 51 102 | JIS H3300 | IS 1545 |
Symbol | CZ 110 | C 68700 | CuZn20AI2 | CuZn22AI2 | C 6870 | CuZn21AI2As |
Cu | 76.0-78.0 | 76.0-79.0 | 76.0-79.0 | 76.0-79.0 | 76.0-79.0 | 76.0-78.0 |
Al | 1.8-2.3 | 1.8-2.5 | 1.8-2.3 | 1.8-2.5 | 1.8-2.5 | 1.8-2.3 |
Pb | 0.07 | 0.07 | 0.07 | 0.07 | 0.07 | 0.07 |
Ni | – | – | 0.1 | – | – | – |
Fe | 0.06 | 0.06 | 0.07 | 0.06 | 0.06 | 0.06 |
Zn | REM’DER | REM’DER | REM’DER | REM’DER | REM’DER | REM’DER |
As | 0.02-0.06 | 0.02-0.06 | 0.02-0.35 | 0.02-0.06 | 0.02-0.06 | 0.02-0.06 |
P | – | – | 0.01 | – | – | – |
Total Impurities Max. | – | |||||
0.03 | – | 0.1 | 0.3 | – | 0.3 | |
Condition | M | 61 | F39 | – | O | O |
TA | – | F34 | – | – | TA | |
O | – | – | – | – | D | |
Yield Strength n/mm2 | – | 125 | 1 50-230 | – | – | 400Mpa Max. |
– | 105 | 120-180 | – | – | 355Mpa Min. | |
– | – | – | – | – | 415Map | |
Tensile n/mm2 Minimum | – | 345 | 390 | – | 373 | – |
– | – | 340 | – | – | – | |
Elng’Tion Percent (%) | – | – | 45Min. | – | 40Min. | 85Max. |
– | – | 55Min. | – | – | 80-110 | |
– | – | – | – | – | 130Min. | |
Hardness HV5 – | 150Min | – | – | 80-130 | – | – |
85-110 | – | – | – | – | – | |
75Max. | – | – | – | – | – | |
Grain Size mm (75X) | 0.05Max. | 0.010-0.045 | – | 0.010-0.045 | 0.010-0.045 | 0.010-0.045 |
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