diff --git a/data/INFO.json b/data/INFO.json
index 67c68a1..e43b4ee 100644
--- a/data/INFO.json
+++ b/data/INFO.json
@@ -28,7 +28,12 @@
     "chi_m": "Magnetic susceptibility; Molar susceptibility \[\chi\ti{m} = \kappa V\ti{m} = \kappa M / \rho \] where \(\kappa\) is the volume susceptibility, \(V\ti{m}\) is the molar volume of the substance, \(M\) the molar mass, and \(\rho\) the mass density. \(\kappa = \bold{M}/\bold{H}\) where \(\bold{H}\) is the magnetic filed and \(\bold{M}\) is magnetic moment per unit volume.",
   },
   "Mechanical Properties": {
-    "Yield strength": "R_{p0.2}"
+    "Yield strength": "R_{p0.2}",
+    "Ultimate tensile strength": "R_m",
+    "Elongation": "A_5",
+    "Hardness": {
+      "HBW": ""
+    }
   },
   "Thermodynamic Properties": {
     "Crystal, Liquid, Gas": {
@@ -85,7 +90,12 @@
     "crystal": "cubic|cubic crystals"
   },
   "Mechanical Properties": {
-    "Yield strength": ["110-130", "MPa"]
+    "Yield strength": ["110-130", "MPa"],
+    "Ultimate tensile strength": ["230-290", "MPa"],
+    "Elongation": ["10-15", "%"],
+    "Hardness": {
+      "HBW": ["68-75", "2.5/62.5"]
+    }
   },
   "Source": [
     {
@@ -96,6 +106,10 @@
         ["4-156", "Crystallographic Data"],
         ["8-13", "Borax Beads"]
       ]
+    },
+    {
+      "Type": "Web",
+      "URL": "http://"
     }
   ]
 }]
diff --git a/data/aluminum.json b/data/aluminum.json
index d88bdcf..a524638 100644
--- a/data/aluminum.json
+++ b/data/aluminum.json
@@ -163,7 +163,16 @@
       "Temper": "homogenized and stress relieved, O3"
     },
     "Mechanical Properties": {
-      "Yield strength": ["110-130", "MPa"]
+      "Yield strength": ["110-130", "MPa"],
+      "Ultimate tensile strength": ["230-290", "MPa"],
+      "Elongation": ["10-15", "%"],
+      "Hardness": {
+        "HBW": ["68-75", "2.5/62.5"]
+      }
+    },
+    "Source": {
+      "Type": "Web",
+      "URL": "https://gleich.de/en/wp-content/uploads/sites/4/2016/10/en_g.al_c250.pdf"
     }
   }
 ]