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 |
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