Tubi - Ottone in alluminio (lega 687)
| STANDARD GRADE | ASTM B 111 C 68700 | BS 2871 / PART 3 CZ 110 (TA) | DIN 17660/1785 CuZn20Al2 | NFA 51102 CuZn22Al2 | JIS H3300 C 6870 (T) | |
|---|---|---|---|---|---|---|
| Cu | 76,0 - 79,0 | 76,0 -78,0 | 76,0 - 79,0 | 76,0 - 79,0 | 76,0 - 79,0 | |
| Al | 1,80 - 2,50 | 1,80 - 2,30 | 1,80 - 2,30 | 1,80 - 2,50 | 1,80 - 2,50 | |
| Pb | 0,07 max. | 0,07 max. | 0,07 max. | 0,07 max. | 0,07 max. | |
| Ni | - | - | 0,10 max. | - | - | |
| Fe | 0,06 max. | 0,06 max. | 0,07 max. | 0,06 max. | 0,06 max. | |
| Zn | Rem. | Rem. | Rem. | Rem. | Rem. | |
| As | 0,02 - 0,10 | 0,02 - 0,06 | 0,02 - 0,035 | 0,02 - 0,06 | 0,02 - 0,06 | |
| P | - | - | 0,01 max. | - | - | |
| Mg | - | - | 0,005 max. | - | - | |
| Mn | - | - | 0,10 max. | - | - | |
| Total Impurities | - | 0,3 max. | Others Total | 0,03 max. | - | |
| Yield Strength | 125 min. (061) | - | 150 - 230 (F39) | - | - | |
| N/mm2 | - | - | 120 - 180 (F34) | - | - | |
| Tensile Strength | 345 min. (061) | - | 390 min. (F39) | - | 373 min. | |
| N/mm2 | - | - | 340 min. (F34) | - | - | |
| Elongation (%) | - | - | 45 min. (F39) | - | 40 min. | |
| Hardness Hv5 | - | 85 - 110 | - | 80 - 130 | - | |
| Grain Size (mm) | 0,010 - 0,045 | 0,050 max. | 0,010 - 0,050 | 0,010 - 0,045 | 0,010 - 0,045 |