diff --git a/basic_materials_steel_bar.png b/basic_materials_steel_bar.png
new file mode 100644
index 0000000..7b7b8df
Binary files /dev/null and b/basic_materials_steel_bar.png differ
diff --git a/changelog.txt b/changelog.txt
index 47e0386..ccf9233 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -2,7 +2,7 @@
 basic_materials filenames, make cement darker. Rename other 
 images as needed to use basic_materials filenames.  Add gold and
 silver wire. Brightened-up copper wire and steel wire a bit, and
-added the empty spool.
+added the empty spool and steel bar.
 
 2018-10-31: remove lower-res Lua controller images
 
diff --git a/image-credits.txt b/image-credits.txt
index b8050af..59a9caa 100644
--- a/image-credits.txt
+++ b/image-credits.txt
@@ -1292,3 +1292,8 @@ https://commons.wikimedia.org/wiki/File:Loupe_%C3%A0_main.jpg
 compost barrel
 --------------
 https://commons.wikimedia.org/wiki/File:Compost_.jpg
+
+basic_mateirials
+----------------
+steel bar:
+https://commons.wikimedia.org/wiki/File:Straight_rebar_closeup.jpg