C752 Nickel-Silver (CuNi18Zn20)

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Overview

Alloy C752 is an 18% nickel silver alloy combining corrosion resistance with strength and a lustrous silver color. Applications include optical frames and parts, springs, surgical instruments, jewelry, resistors and contacts.

Physical Properties

Annealing Range (Min) 1100 °F
Annealing Range (Max) 1400 °F
Density 0.316 lb/in³
Electrical Resistivity (Annealed) 172.9 Ω·cir-mil/ft @ 68 °F
Electrical Conductivity (Annealed) 6% IACS @ 68 °F
Thermal Conductivity 19 Btu/ft²/ft·hr/°F @ 68 °F
Coefficient of Thermal Expansion 9 per °F (68-572 °F)
Modulus of Elasticity (Tension) 18 ksi
Modulus of Rigidity (Tension) 6 ksi
Melting Point (Solidus) 1,620 °F
Melting Point (Liquidus) 1,880 °F
Annealing Range (Min) 593 °C
Annealing Range (Max) 760 °C
Density 8.94 gm/cm³
Electrical Resistivity (Annealed) 28.74 µΩ·cm @ 20 °C
Electrical Conductivity (Annealed) 0.03 MS·cm @ 20 °C
Thermal Conductivity 33 W/m·K @ 20 °C
Coefficient of Thermal Expansion 16.2 per °C (20-300 °C)
Modulus of Elasticity (Tension) 124 Mpa
Modulus of Rigidity (Tension) 46 Mpa
Melting Point (Solidus) 882 °C
Melting Point (Liquidus) 1,027 °C

Round Wire

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
Annealed   53.0 63.0 .0010 - .1285 inch
1/4 Hard H01 68.0 84.0
1/2 Hard H02 83.0 97.0
Hard H04 99.0 111
Spring H08 105  
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
Annealed   360 440 .0254 - 3.264 mm
1/4 Hard H01 460 580
1/2 Hard H02 570 670
Hard H04 680 770
Spring H08 720  

Square Wire

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
Annealed   53.0 63.0 .0100 - .0808 inch 
1/4 Hard H01 68.0 84.0
1/2 Hard H02 83.0 97.0
Hard H04 99.0 111
Spring H08 105  
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
Annealed   360 440 .2540 - 1.905 mm
1/4 Hard H01 460 580
1/2 Hard H02 570 670
Hard H04 680 770
Spring H08 720  

Rolled Flat

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
Annealed   53.0 63.0 Thickness:
.0100 - .0500 inch

Width:
.0150 - .2500 inch
1/4 Hard H01 58.0 72.0
1/2 Hard H02 66.0 80.0
3/4 Hard H03 74.0 86.0
Hard H04 78.0 91.0
Spring H08 90.0 101
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
Annealed   360 440 Thickness:
.2540 - 1.905 mm

Width:
.3810 - 6.350 mm
1/4 Hard H01 390 500
1/2 Hard H02 450 560
3/4 Hard H03 510 600
Hard H04 530 630
Spring H08 620 700

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