|
BS2874 : NS101 : BS2870 :
NS104 / NS106 - Silverspeed - XL
Nickel Silver is copper alloy with additions of zinc and nickel.
Their special blend of mechanical properties, physical properties
and performance characteristics depend on the relative proportions
of the three elements. Their attractive colour varies from pale gold
to silvery white. They are termed nickel silver because they contain
nickel and are, by and large, silvery in appearance. But the term is
somewhat misleading since they are neither nickel-based nor do they
contain silver! They are best considered as brasses to which nickel
is added, primarily to improve tarnish resistance, oxidation
resistance and general mechanical performance characteristics.
Nickel Silvers are capable of providing a unique combination of
strength, high modulus spring properties, corrosion and oxidation
resistance, anti-galling properties, excellent cryogenic performance
and numerous other attributes combined with ease of forming,
machining plating and joining.
Silverspeed-XL Extra Free-Machining Rod
This is a truly superlative free-machining alloy with a
machineability almost the same as free-cutting brass. It is highly
recommended for the production of intricate components by complex
machining operations. This grade is stocked exclusively by Columbia
and as with all standard grades, will be specified in the new
European Standards for copper based alloys. It has basically the
same application and performance characteristics as NS101, but with
an invaluable increase of around 20% in machineability.
Nominal Composition :
NS 101 45% Copper 10% Nickel 2% Lead Remainder Zinc NS104 63%
Copper 12% Nickel 0.2% Manganese Remainder Zinc NS 106 63% Copper
18% Nickel 0.3% Manganese Remainder Zinc Silverspeed 49% Copper 7%
Nickel 3% Lead 2% Manganese Remainder Zinc
Mechanical Properties : (Specification Minima all
sizes)
NS 101 UTS 460N/mm : Elongation 8% NS 104 Hardness 130 HV NS 106
Hardness 110 HV max Silverspeed UTS 500N/mm2 : PS 400N/mm2 :
Elongation 18% : Hardness 180 HV
|
Chemical
Properties |
|
| Cu |
44.00 - 47.00 |
| Pb |
1.00 - 2.50 |
| Ni |
9.00 - 11.00 |
| Fe |
0.40 Max |
| Mn |
0.20 - 0.50 |
| Zn |
Remainder |
| Total Other Impurities (Excl.
Iron) 0.30 Max. |
|
|
Mechanical
Properties As Manufactured |
|
| %Elongation at 5.65Sq.Rt So
G.L. 8.00 Min. |
| U.T.S.
N/mm Sq. |
460 Min. |
| Size |
Over 6 mm to 80 mm |
|
|
 |
|
