add further data for the alloy

data/aluminum.json

@@ -154,6 +154,16 @@
   },
   {
     "Name": "G.AL® C250 Aluminium Präzisionsplatte",
-    "Alloy": ["EN AW 5083", "AlMg4,5Mn0,7", "Sondertyp"]
+    "Alloy": {
+      "Standard": "EN AW 5083",
+      "Type": "non heat-treatable"
+    },
+    "Formula": "AlMg4.5Mn0.7",
+    "Heat treatment": {
+      "Temper": "homogenized and stress relieved, O3"
+    },
+    "Mechanical Properties": {
+      "Yield strength": ["110-130", "MPa"]
+    }
   }
 ]