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Pt20lr

General Alloy Overview

ASTM

B684

Application Examples

Smart meter electrodes; high strength medical wire

Industry Examples

Industrial, Medical

Tempers

Cold Worked

Availible Forms

Rod, Strip

Constant (Temper - Independent) Properties

ParameterValue
Solidus, °F (°C)3402 (1872)
Liquidus, °F (°C)3472 (1911)
Melting Range, °F (°C)70 (39)
Density dwt/in3 (g/cm3)227.9 (21.63)
Electrical Resistivity, µΩ-cmf (µΩ-cm)189 (31.5)
Electrical Conductivity, %IACS5.47
Temperature Coefficent of Resistance, /°F (/K)6.8E-04 (1.2E-03)
Thermal Conductivity, Btu/hr-ft-°F (W/m-K)13.3 (23)
Coefficient of Thermal Expansion, /°F (/K)4.7E-06 (8.4E-06)
Thermal EMF vs. Pt, µV/°F (µV/°C)3.9 (7.1)
ParameterValue
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 Ratio0.360
Single phase/multiphaseSingle Phase
Lattice parameter, Å (ph. 1)3.90
Emissivity0.335
Contact resistance (Cres), 30 gf, mΩ15
Cres, oxidized 1,000h@150°C, 30 gf, mΩ15
Cres, flowers of sufur 720h@50°C, 30gf, mΩ15

Cold Worked

Material Tested: Rod

ParameterValue
0.2% Offset Yield Strength, ksi (MPa)131 (900)
Ultimate Tensile Strength, ksi (MPa)138 (950)
Elongation to Failure, %8
ParameterValue
Knoop Microhardness, HK100295
Vickers Microhardness, HV100280

Material Tested: Strip

ParameterValue
0.2% Offset Yield Strength, ksi (MPa)178(1230)
Ultimate Tensile Strength, ksi (MPa)189 (1300)
Elongation to Failure, %4
ParameterValue
Knoop Microhardness, HK295
Vickers Microhardness, HV280

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