Elektron WE43

Datasheet : 467

Magnesium Elektron UK, P.O. Box 23, Rake Lane, Swinton, Manchester, M27 8DD, England. Tel: 0161 911 1000 Fax: 0161 911 1010 Web: www.-elektron.com VAT No: GB 668 2142 26 A Division of MAGNESIUM ELEKTRON LIMITED. Registered in England No. 3141950. Registered Office: The Victoria, 150-182 Harbour City, Salford Quays, Salford, M50 3SP A Luxfer Group Company Elektron WE43

ELEKTRON WE43 is a high CHEMICAL COMPOSITION OTHER PROPERTIES strength magnesium based casting 3.7–4.3% developed and patented by Rare Earths 2.4–4.4% CASTABILITY Magnesium Elektron for use at Zirconium 0.4% min Fine grained and pressure tight with temperatures up to 300°C. Magnesium Balance good casting characteristics. This alloy system maintains its good mechanical properties at HEAT TREATMENT PATTERN MAKERS SHRINKAGE elevated temperatures, without the The alloy develops its optimum FACTOR use of either or thorium. properties in the fully heat treated 1.5% The alloy is stable for long term condition ie: exposure up to 250°C. Solution heat treat for 8 hours at WELDABILITY 525°C, Fully weldable by the tungsten arc ELEKTRON WE43 has excellent Air cool, hot water or polymer inert gas (TIG) process, using filler corrosion resistance characteristics. quench, rods of the parent alloy composition. Age for 16 hours at 250°C, APPLICATIONS Air cool. MACHINING The excellent retention of ELEKTRON WE43 castings, like all properties at elevated temperatures PHYSICAL PROPERTIES castings, machine will be of interest to designers of Specific gravity 1.84 faster than any other metal. Providing aeroengines and other power Coefficient of the geometry of the part allows, the -6 -1 systems, helicopter transmissions, thermal expansion 26.7 x 10 K limiting factor is the power and -1 -1 missiles, racing and high Thermal conductivity 51.3 Wm K speed of the machine rather than -1 -1 performance cars. Specific heat 966 Jkg K the quality of the tool material. Electrical resistivity 148 nΩm The power required per cubic 3 SPECIFICATIONS Modulus of elasticity 44 x 10 MPa centimetre of metal removed varies UNS No. M18430 Poissons ratio 0.27 from 9 to 14 watts per minute ASTM B80 Melting range 540–640°C depending on the operation. AMS 4427 Damping index 0.09 MAM 4427 Vickers hardness 85–105 SURFACE TREATMENT AECMA MG-C96002 Normal protective treatments apply for DESIGN DATA ELEKTRON WE43 but some Minimum specification tensile chromating baths may need to be properties modified for the satisfactory treatment 0.2% Proof stress 172 MPa of castings. Tensile strength 220 MPa Please refer to Magnesium Elektron Elongation 2% Data Sheet 206. AMBIENT TEMPERATURE MECHANICAL ELEVATED TEMPERATURE MECHANICAL PROPERTIES PROPERTIES

TYPICAL TENSILE PROPERTIES TYPICAL TENSILE PROPERTIES 0.2% Proof stress 180 MPa FIG. 2 Effect of temperature on tensile properties Tensile strength 250 MPa Elongation 7% 300

TYPICAL COMPRESSIVE PROPERTIES Tensile Strength

0.2% Proof stress 187 MPa 200 Ultimate strength 323 MPa STRESS (MPa) 0.2% Proof Stress

TYPICAL SHEAR PROPERTIES 100 50 40 Ultimate stress 162 MPa 30 Elongation 20 10 ELONGATION % 0 0 ELONGATION % FRACTURE TOUGHNESS 0 100 200 300 1/2 K IC 15.9 MPa m TEMPERATURE (°C)

FATIGUE PROPERTIES CREEP PROPERTIES FIG. 1 Rotating bend fatigue test FIG. 3 Stress / time relationship for specified creep 140 strains at 200°C 200

120 180

MAXIMUM 100 160 STRESS 140 (MPa) STRESS 80 (MPa) 120 0.2% 0.5%

60 100

80 0.1% 40 104 105 106 107 108 60 CYCLES OF STRESS 10 100 1000 5000 TIME (HOURS) FIG. 4 Stress / time relationship for specified creep strains at 250°C 90

80

70

60 STRESS (MPa) 50

40 0.5% 30 0.2%

20 0.1% 10 10 100 1000 5000 TIME (HOURS)

FATIGUE PROPERTIES FIG. 5 Rotating bend fatigue test 140 130 120 110 150°C MAXIMUM 100 STRESS 90 (MPa) 250°C 80 70 60 50 40 104 105 106 107 108 CYCLES OF STRESS Elektron WE43 Castings

CUT UP PROPERTIES OF SAMPLES TAKEN FROM ACTUAL CASTINGS

Temperature Number of 0.2% Proof Stress Tensile Strength Elongation Tests (MPa) (MPa) (%)

20°C 215 Minimum 149 200 2 Average 178 250 7 Maximum 215 293 17

250°C 56 Minimum 134 187 2 Average 155 211 18 Maximum 193 235 36

All Information is given in good faith but without warranty. Freedom from patent rights must not be assumed. Health and Safety information is available for all Magnesium Elektron products. MAGNESIUM ELEKTRON, THE 'e' LOGO, MEL, ELEKTRON and ZIRMAX are registered trademarks of Magnesium Elektron Limited. 05/06