BRASS CONDENSORS TUBES
alloy
| CuZn20Al2 - DIN 17660
CuZn28Sn1 - DIN 17660
| chemical composition [%]
| CuZn20Al2 – 2.0460
| Cu
| Al
| As
| Fe
| Mn
| Ni
| P
| Pb
| Zn
| Mg
| oth.
| 76,0 – 79,0
| 1,8 – 2,3
| 0,020 – 0,035
| max. 0,07
| max. 0,1
| max. 0,1
| max. 0,01
| max. 0,07
| rest.
| max. 0,005
| max. 0,1
| CuZn28Sn1 – 2.0470
| Cu
| Sn
| As
| Fe
| Mn
| Ni
| P
| Pb
| Zn
| oth
| 70,0 – 72,5
| 0,9 – 1,3
| 0,020 – 0,035
| max. 0,07
| max. 0,1
| max. 0,1
| max. 0,01
| max. 0,07
| rest
| max. 0,1
| dimension [mm]
| 12,0 – 35,0 x 1,0 – 2,5 (oth. dim on client requirement )
| outer Ø
| wall thickness
| 12,0 – 32,0
| 1,0 – 1,49
| 12,0 – 45,0
| 1,5 – 2,00
| 25,0 – 35,0
| 2,0 – 2,50
| mechanical characteristic
| CuZn20Al2 – F34, F39 DIN 1785
CuZn28Sn1 – F32, F36 DIN 1785
| tolerance
| according to DIN 1785
| surface
| according to DIN 1785 respond producing method, tubes with oxided surface. On clients tubes.
| Particles
| according to DIN 1785 0,010 – 0,050 mm
| planeness
| for F32 i F34 max. distortion up to 8mm / 1 m
for F36 i F 39 max. distortion up to / 1 m
| ends
| tubes have neaten ends
cutting angle max. 0,5 mm
| tests
| 100% tubes are tested for leak proof according to whirling flow method according to DIN DKI 781
ammoniacal test - testing inner tension
press test - only for F32 a F34 until walls contact without clefts
extension test - under angle of 45° tubes are extended up to 30% - without clefts
| package
| tubes with wall thickness 1,5 mm are packed into wooden case, above 1,5 mm packed to bundles by 500 pieces, foil-wrapped and fastened by steel ribbon
| minimum sales
| 500 kg in ordered dimension
| certificates
| ADW 6/2 published TÜV
| usage
| condenser tubes, heat exchanger, cooling systems
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