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Gravity / Sand casting Alloys

MRI 201S and MRI 202S are sand/gravity casting alloys designed for highly stressed components operating at temperatures up to 300o C.

These new alloys in the T6 conditions exhibit excellent mechanical properties and creep resistance combined with outstanding capability, pressure tightness, weldability, dimension stability and corrosion resistance.

The alloys are designed for high temperature applications in automotive and aerospace industries such as large engine block, cylinder head cover, helicopter gearbox housings etc.

Properties

MRI 202S T6 MRI 201S T6
Tensile Yield Strength (MPa)

 

at 20ºC

at 150ºC

at 175ºC

at 200ºC

 

 

150-165

145-160

140-155

135-145

 

 

170-190

165-180

160-175

155-165

Ultimate Tensile Strength (MPa)

 

at 20ºC

at 150ºC

at 175ºC

at 200ºC

 

 

250-270

220-245

210-235

200-215

 

255-270

245-255

230-245

220-235

Elongation (%)

 

at 20ºC

at 150ºC

at 175ºC

at 200ºC

 

 

6-10

12-15

12-16

14-18

 

5-7

10-12

12-15

13-17

Compression Yield Strength (MPa)

 

at 20ºC

at 150ºC

at 175ºC

at 200ºC

 

                           145-170

140-165

140-155

135-145

 

170-190

165-185

160-170

155-165

Stress [MPa] to produce 0.2% creep strain for 100 hours

at 175ºC

at 200ºC

at 250ºC

 

 

155

120

40

 

 

185

170

75

 

 

Typical Physical Properties

Properties Unit T ºC MRI 202S MRI 201S
Density g/cm3 20 1.79 1.79
Melting range ºC 574-646 574-646
Lin. thermal expansion coefficient µm/mK 20-100 25.1 25.1
Specific heat capacity kJ/kgK 20 1.05 1.05
Thermal conductivity W/mK 100 91 91
Electrical conductivity MS/m 20 15.9 15.9