Sprayforming - BC-9
(Extrahard Nickel-free tinbronze)
Type of material:
High tensile tinbronze, suited for non-allegic products
Main elements (Nom.)
- Cu Rest
- Sn 15,0 %
- Fe 1,0 %
- Ti 0.1 %
Mechanical properties(nom.)
Yield strength (Rp N/mm2 ):
Tensile strength (Rm N/mm2):
Elongation in % A 5:
Hardness /Vickers:
Extruded
570 N/mm2
700 N/mm2
19 %
250 HV
Soft
250 N/mm2
600 N/mm2
45 %
140 HV
(All values = Nominal values)
Density ~ 8,7 g/cm3
Mating material:
Min. surface hardness >350 HB
Rec. Surface roughness < 1 Ra.
Machineability: 40 /100 (Index, Index, free cutting brass, CuZn39Pb3 = 100 /100)
Physical properties
Electrical conductivity, MS/m:5
% IACS: 8
Thermal conductivity, W/moK: < 50
E-modulus, kN/mm2: 85
| Fabrication |
Good |
Moderate |
Poor |
| Forming |
|
|
|
| Capacity for being cold worked |
x |
|
|
| Capacity for being hot worked |
x |
|
|
| Welding, brazing and soldering |
|
|
|
| Resistance welding |
x |
|
|
| Brazing |
x |
|
|
| Soldering |
x |
|
|
| Surface treatment |
|
|
|
| Mechanical |
x |
|
|
| Elektrolytic |
x |
|
|
| Electroplating |
x |
|
|
Material description
BC9 is Nickel-free and therefore highly suitable for products, for every day use, that come in direct contact with the skin. BC9 meets the stringent human ecological requirements of the textile industry and has been awarded with Oe ko-Tex Certifikate No. Z1.0.8293 .
The alloy is characterized by very high mechanical strength combined with good elongation. The golden very decorative surface can be easily polished or coated. Processing (machining, polishing, joining, coating) is done wit the usual equipment and tools.
Tinbronze alloys generally exhibit good corrosion resistance to atmospheric influences, organic substances (sweat, environmental influence) as well as alkaline and neutral saline solutions.