diff --git a/prototypes/248k_fluids.lua b/prototypes/248k_fluids.lua
index 1a44d5b..0edac91 100644
--- a/prototypes/248k_fluids.lua
+++ b/prototypes/248k_fluids.lua
@@ -225,8 +225,8 @@ data:extend({
         type = 'fluid',
         icon = sprite('el_arc_pure_iron.png'),
         icon_size = 64,
-        default_temperature = 15,
-        max_temperature = 1500,
+        default_temperature = 1600,
+        max_temperature = 2000,
         heat_capacity = '100kJ',
         base_color = { r=0.92, g=0.29, b=0.22 }, 
 		flow_color = { r=0.92, g=0.29, b=0.22 }, 
@@ -240,8 +240,8 @@ data:extend({
         type = 'fluid',
         icon = sprite('el_arc_pure_copper.png'),
         icon_size = 64,
-        default_temperature = 15,
-        max_temperature = 1500,
+        default_temperature = 1100,
+        max_temperature = 2000,
         heat_capacity = '100kJ',
         base_color = { r=0.92, g=0.29, b=0.22 }, 
 		flow_color = { r=0.92, g=0.29, b=0.22 }, 
@@ -255,8 +255,8 @@ data:extend({
         type = 'fluid',
         icon = sprite('el_arc_pure_aluminum.png'),
         icon_size = 64,
-        default_temperature = 15,
-        max_temperature = 1500,
+        default_temperature = 700,
+        max_temperature = 2000,
         heat_capacity = '100kJ',
         base_color = { r=0.92, g=0.29, b=0.22 }, 
 		flow_color = { r=0.92, g=0.29, b=0.22 }, 
@@ -270,8 +270,8 @@ data:extend({
         type = 'fluid',
         icon = sprite('fi_arc_glass.png'),
         icon_size = 64,
-        default_temperature = 15,
-        max_temperature = 1500,
+        default_temperature = 1500,
+        max_temperature = 2000,
         heat_capacity = '100kJ',
         base_color = { r=0.92, g=0.29, b=0.22 }, 
 		flow_color = { r=0.92, g=0.29, b=0.22 }, 
@@ -285,8 +285,8 @@ data:extend({
         type = 'fluid',
         icon = sprite('fi_arc_gold.png'),
         icon_size = 64,
-        default_temperature = 15,
-        max_temperature = 1500,
+        default_temperature = 1100,
+        max_temperature = 2000,
         heat_capacity = '100kJ',
         base_color = { r=0.92, g=0.29, b=0.22 }, 
 		flow_color = { r=0.92, g=0.29, b=0.22 }, 
@@ -300,8 +300,8 @@ data:extend({
         type = 'fluid',
         icon = sprite('fi_arc_titan.png'),
         icon_size = 64,
-        default_temperature = 15,
-        max_temperature = 1500,
+        default_temperature = 1700,
+        max_temperature = 2000,
         heat_capacity = '100kJ',
         base_color = { r=0.92, g=0.29, b=0.22 }, 
 		flow_color = { r=0.92, g=0.29, b=0.22 }, 
@@ -315,8 +315,8 @@ data:extend({
         type = 'fluid',
         icon = sprite('fi_arc_neodym.png'),
         icon_size = 64,
-        default_temperature = 15,
-        max_temperature = 1500,
+        default_temperature = 1300,
+        max_temperature = 2000,
         heat_capacity = '100kJ',
         base_color = { r=0.92, g=0.29, b=0.22 }, 
 		flow_color = { r=0.92, g=0.29, b=0.22 }, 
@@ -330,8 +330,8 @@ data:extend({
         type = 'fluid',
         icon = sprite('fu_arc_pure_lead.png'),
         icon_size = 64,
-        default_temperature = 15,
-        max_temperature = 1500,
+        default_temperature = 350,
+        max_temperature = 2000,
         heat_capacity = '100kJ',
         base_color = { r=0.92, g=0.29, b=0.22 }, 
 		flow_color = { r=0.92, g=0.29, b=0.22 },