C18080 Copper Chromium Silver

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Overview

Physical Properties

Annealing Range (Min) 1800 °F
Annealing Range (Max) 1850 °F
Density 0.322 lb/in³
Electrical Resistivity (Annealed) 13 Ω·cir-mil/ft @ 68 °F
Electrical Conductivity (Annealed) 80% IACS @ 68 °F
Thermal Conductivity 185 Btu/ft²/ft·hr/°F @ 68 °F
Coefficient of Thermal Expansion 9.4 per °F (68-572 °F)
Modulus of Elasticity (Tension) 18 ksi
Modulus of Rigidity (Tension) 7 ksi
Melting Point (Solidus) 1,700 °F
Melting Point (Liquidus) 1,900 °F
Annealing Range (Min) 982 °C
Annealing Range (Max) 1010 °C
Density 8.94 gm/cm³
Electrical Resistivity (Annealed) 2.16 µΩ·cm @ 20 °C
Electrical Conductivity (Annealed) 0.47 MS·cm @ 20 °C
Thermal Conductivity 320 W/m·K @ 20 °C
Coefficient of Thermal Expansion 16.9 per °C (20-300 °C)
Modulus of Elasticity (Tension) 128 Mpa
Modulus of Rigidity (Tension) 49 Mpa
Melting Point (Solidus) 927 °C
Melting Point (Liquidus) 1,038 °C

Round Wire

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
HM TM04 70.0 81.0 .0010 - .1285 inch
XHMS TM08 78.0 91.0
Spring AT + SR TR08 75.0 91.0
Hard TL04 80.0 95.0
Spring TL08 90.0 105
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
HM TM04 480 560 .0254 - 3.264 mm
XHMS TM08 530 630
Spring AT + SR TR08 510 630
Hard TL04 550 660
Spring TL08 620 730

Square Wire

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
HM TM04 70.0 81.0 .0100 - .0808 inch 
XHMS TM08 78.0 91.0
Spring AT + SR TR08 75.0 91.0
Hard TL04 80.0 95.0
Spring TL08 90.0 105
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
HM TM04 480 560 .2540 - 1.905 mm
XHMS TM08 530 630
Spring AT + SR TR08 510 630
Hard TL04 550 660
Spring TL08 620 730

Rolled Flat

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
HM TM04 70.0 81.0 Thickness:
.0100 - .0500 inch

Width:
.0150 - .2500 inch
XHMS TM08 78.0 91.0
Spring AT + SR TR08 75.0 91.0
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
HM TM04 480 560 Thickness:
.2540 - 1.905 mm

Width:
.3810 - 6.350 mm
XHMS TM08 530 630
Spring AT + SR TR08 510 630

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