Pt20lr

General Alloy Overview

ASTM

B684

Application Examples

Smart meter electrodes; high strength medical wire

Industry Examples

Industrial, Medical

Tempers

Annealed, Stress Relieved

Availible Forms

Rod, Wire, Fine Wire, Strip

Constant (Temper - Independent) Properties

ParameterValue
Solidus, °F (°C)3401.6 (1872)
Liquidus, °F (°C)3471.8 (1911)
Melting Range, °F (°C)102.2 (39)
Density dwt/in3 (g/cm3)227.9 (21.6)
Electrical Resistivity, µΩ-cmf (µΩ-cm)189 (31.5)
Electrical Conductivity, %IACS5.47
Temperature Coefficent of Resistance, /°F (/K)0.00068 (0.00122)
Thermal Conductivity, Btu/hr-ft-°F (W/m-K)13.3 (23)
Coefficient of Thermal Expansion, /°F (/K)0.00000468 (0.00000842)
ParameterValue
Thermal EMF vs. Pt, µV/°F (µV/°C)3.9 (7.1)
Specific Heat Capacity, Btu/lb-°F (J/g-K)0.032 (0.133)
Elastic Modulus, Msi (GPa)34.6 (239)
Shear Modulus12.7 (87.8)
Poisson's Ratio0.36
Single phase/multiphaseSingle Phase
Lattice parameter3.9
Emissivity0.335

Annealed Properties

Material Tested: Wire
Size: 0.09in (2.286mm) diameter

ParameterValue
0.2% Offset Yield Strength, ksi (MPa)121 (830)
Ultimate Tensile Strength, ksi (MPa)121 (835)
Elongation to Failure, %17
ParameterValue
Knoop Microhardness, HK100295
Vickers Microhardness, HV100278

Material Tested: Strip
Size: 0.0053in (0.13462mm) thickness

ParameterValue
0.2% Offset Yield Strength, ksi (MPa)178 (1225)
Ultimate Tensile Strength, ksi (MPa)185 (1275)
ParameterValue
Elongation to Failure, %3
Knoop Microhardness, HK100380

Cold Worked Properties

Material Tested: Wire
Size: 0.07-0.126in (1.778-3.2004mm) diameter

ParameterValue
Ultimate Tensile Strength, ksi (MPa)137 (945)
Elongation to Failure, %8
ParameterValue
Vickers Microhardness, HV100282

Material Tested: Strip
Size: 0.003-0.008in (0.0762-0.2032mm) thickness

ParameterValue
0.2% Offset Yield Strength, ksi (MPa)177 (1225)
Ultimate Tensile Strength, ksi (MPa)188 (1298)
ParameterValue
Elongation to Failure, %4

Stress Relieved Properties

ParameterValue
0.2% Offset Yield Strength, ksi (MPa)171 (1180)
Ultimate Tensile Strength, ksi (MPa)178 (1230)
ParameterValue
Elongation to Failure, %3

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