Nickel Bronze Vs Phosphor Bronze

Nickel Bronze Vs Phosphor Bronze

Copper makes up the majority of the content of the bronze family of copper alloys. In comparison to phosphor bronze, which contains less nickel, nickel bronze has a higher nickel content of up to 30%. In comparison to nickel bronze, phosphor bronze has higher stiffness and wear resistance. Both of these materials are used in a variety of sectors, primarily in the production of musical instruments like guitar strings. The bronze's flexibility makes it suitable for usage in these many applications.

The core metal is shielded from further corrosion by the surface oxide development. Its distinctive bronze colour is also a result of the copper oxide layer that develops on the surface. The hue and tone vary slightly depending on whether nickel or phosphorus have been added. The materials have a density that is roughly 10% lower than typical stainless steels. They are hence simple to fabricate, cut, mould, and machine. Additionally, the material conducts electricity more efficiently than stainless steel.

Nickel And Phosphor Bronze Melting Point

The melting point of phosphor bronze can reach up to 1060 degrees from 930 degrees Celsius, but the melting point of nickel bronze ranges from 1060 to 1075 degrees Celsius. Nickel bronze hence naturally has a wider variety of melting points. The melting points vary depending on the particular proportions of chemical composition, although the nickel bronze classes have larger melting point ranges. Because they have lower melting points than stainless steels, bronze materials can be produced more quickly.

In the past, bronze materials were utilised to create sculptures and other forms. Because of its ductility, it is employed in musical instruments and other things. The bronze material is advantageous for creating bushes and bearings because of its low metal-to-metal friction. Bronze materials can be used in sea water and marine industrial applications because of their minimal corrosion to chloride ions.

 

Difference Between Nickel And Phosphor Bronze Metal Price

The materials made of phosphor bronze are less expensive than those made of nickel bronze. The price variance is made possible by the different compositions. However, any unique chemical composition or unusual additives necessitate an increase in production costs. Therefore, if the chemical composition is a distinctive and unique requirement, it may result in higher prices for phosphor bronze. Due to the presence of copper in the composition, bronze materials are often more expensive than stainless steel materials. All copper alloys are expensive because copper itself is.

 

Chemical Composition of Phosphor Bronze

Composition of PB1 and Pb2 Phosphor Bronze

  LEADED BRONZE / PHOSPHOR BRONZE LB2 / LB4 / PB2 PB1 PHOSPHOR BRONZE
  MINIMUM MAXIMUM MINIMUM MAXIMUM
Copper 87 89.5 87 89.5
Tin 10.0 11.5 10.0 11.5
Lead   0.25   0.25
Zinc   0.05   0.05
Nickel   0.10   0.10
Phosphorous   1.0   1.0
Aluminium   0.01   0.01
Iron   0.1   0.1
Antimony   0.05   0.05
Manganese   0.05   -
Sulphur   0.05   0.05
Silicon   0.01   0.01
Bismuth   0.05   0.05
Impurities   0.05   -

 

Equivalent Material of Phosphor Bronze

Equivalent Specifications of Pb2

  • DIN 1705 2.1052.04
  • AS 1565-1985 C90810
  • ASTM B 505 C90700
  • BS EN 1982-2008 GC CC481K
  • UNI 7013-72-2A
  • BS 1400 PB2
  • AS 1565-1974 904D
  • SAE 65C
  • CuSn11P-C

Equivalent Specifications of Pb1

  • BS EN 1982-2008 GC CC481K
  • BS 1400 PB1
  • CuSn11P-C
  • SAE 65c
  • AS 1565-1974 904D
  • Def Stan 02 838 Part 1
  • NES 838 Part 1
  • NES 838
  • AS 1565-1985 C90710
  • ASTM B 505 C90700

 

Mechanical Properties of Phosphor Bronze

Pb2 Phosphor Bronze Properties

YIELD/PROOF STRENGTH 190
HARDNESS 120
TENSILE STRENGTH 400
ELONGATION 20

Pb2 Physical Properties

MELTING TEMPERATURE RANGE 831-999
DENSITY 8.8
THERMAL CONDUCTIVITY 45
THERMAL EXPANSION 19
ELECTRICAL RESISTIVITY 0.17
RELATIVE MAGNETIC PERMEABILITY

 

Grades of Phosphor Bronze
GRADE RELATED GRADES
PB102
CW451K / C51000
PB104
CW453K / C52100
PB1
CC481K / C91700

 

Melting Temperature Point of Phosphor Bronze

831-999  °C

 

Density of Phosphor Bronze
GRADE DENSITY (G/CMᶟ) APPROX
Phosphor Bronze LB2 / LB4 / PB2 8.7
Phosphor Bronze PB1 8.7

 

Physical Properties of Nickel Bronze Alloy
  US ENGLISH METRIC
Liquidus - Melting Point 1930 °F 1054 °C
Solidus Melting Point 1900 °F
1038 °C
Gravity 7.530 7.53
Electrical Conductivity 8% IACS
@ 68 °F
0.049 MegaSiemens/cm
@ 20 C
Electrical Resistivity N/A N/A
Thermal Conductivity 24.2 Btu/sq ft/ft hr/°F
@ 68 °F
41.9 W/m
@ 20 °C
Specific Heat Range 0.1 Btu/lb/°F
@ 68 °F
 419 J/kg
@293 °C
Magnetic Permeability
1.320 1.32

Thermal Expansion Coefficient

(68-212 °F) 9 10-6 per °F

(20-100 °C) 15.5 10-6 per °C
Elasticity
16000 ksi 110000 MPa

 

equivalent Grades of C63000 nickel aluminum bronze
  • ASTM B505
  • ASTM B584
  • MIL V-18436
  • SAE J461
  • ASTM B763
  • ASME SB584
  • ASTM B30
  • ASTM B271
  • SAE J462

 

Chemical Composition of Nickel Bronze
CU% AI% SN% PB% ZN% SB% P% FE% NI% S% MN% SI%
78.00
MIN
10.00-
11.50

N/A

N/A

N/A

N/A

N/A
3.00-
5.00
3.00-
5.50

N/A

3.50

N/A

 

Mechanical Properties of Nickel Bronze Material
Tensile Stress, min 655 MPa / 95 ksi
Brinell Hardness 208
Yield Strength @ .5% ext under load min 290 MPa / 42 ksi
Elongation in 2 in. or 50 mm min, % 10
Machinability Rating % 50%

 

Density of Nickel Alloy Bronze
  US ENGLISH METRIC
Density 0.272 lb/in 3
@ 68 °F
7.53 gm/cm 3
@ 20 °C