diff --git a/src/Mod/Material/StandardMaterial/AlMg3F24.FCMat b/src/Mod/Material/StandardMaterial/AlMg3F24.FCMat
index ba6800978e..558e53e29e 100644
--- a/src/Mod/Material/StandardMaterial/AlMg3F24.FCMat
+++ b/src/Mod/Material/StandardMaterial/AlMg3F24.FCMat
@@ -23,4 +23,6 @@ YieldStrength = 180 MPa
 YoungsModulus = 70000 MPa
 
 [Thermal]
-ThermalExpansionCoefficient = 0.000023 m/m/K
+SpecificHeat = 900 J/kg/K
+ThermalConductivity = 150 W/m/K
+ThermalExpansionCoefficient = 23 µm/m/K
diff --git a/src/Mod/Material/StandardMaterial/AlMgSi1F31.FCMat b/src/Mod/Material/StandardMaterial/AlMgSi1F31.FCMat
index ac99b46949..d58151bdfc 100644
--- a/src/Mod/Material/StandardMaterial/AlMgSi1F31.FCMat
+++ b/src/Mod/Material/StandardMaterial/AlMgSi1F31.FCMat
@@ -23,4 +23,6 @@ YieldStrength = 260 MPa
 YoungsModulus = 70000 MPa
 
 [Thermal]
-ThermalExpansionCoefficient = 0.000023 m/m/K
+SpecificHeat = 896 J/kg/K
+ThermalConductivity = 160 W/m/K
+ThermalExpansionCoefficient = 23 µm/m/K