Heat

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For the heat mechanic in the desert, see desert heat.

Heat is the mechanic which affects Smithing. It determines the rate at which Progress is made on an unfinished smithing item. Higher heat relates to faster progress. Heat is gradually lost in the smithing process.

Current level of heat can be seen in two locations
Current heat level is shown above the player's head with an orange bar.
heat bar above the players head
A detailed tooltip shows the heat level by hovering the cursor over the unfinished smithing item in the inventory.
heat tooltip in player inventory

When first started in progress smithing objects start with either 60 heat or maximum heat, as described later in this page. The requirement for starting at maximum heat is a smithing level that depends only on the material and exceeds that material's base smithing level by a few levels. For example, players start Orikalkum items at maximum heat at a smithing level of at least 63 (base smithing level of 60), and players start Elder rune items at maximum heat at a smithing level of at least 98 (base smithing level of 90).

Players can increase the heat of an object by heating at a Forge, and some items can require re-heating many times. For heating or re-heating, the amount of heat per tick is also dependent on the player's Smithing and Firemaking level and with 99 in both skills the amount of heat gained per tick is 150. Visible boosts also apply. The exact formula is as follows:

Heat per tick = 50 + Floor(1/2 Smithing level + 1/2 Firemaking level)

The maximum amount of heat each item can hold is dependent on the player's Smithing and Firemaking level, and the material. The "Heat cap" of an item is increased by either 50 or 100 if a player's smithing level exceeds the material's base smithing level by a few levels, depending on the material. These are shown in the in-game level guide. For example, at level 15 smithing, the Heat cap of iron (smithing items) is raised by 100. This bonus of 0, 50, or 100 is referred to as the material bonus. With 99 in both skills and any core metal item (but not masterwork), the maximum amount of heat is 994. Visible boosts also apply. The exact formula is as follows:

MaximumHeat = 300 + 3x Smithing level + 3x Firemaking level + Material bonus

The Progress needed to smith an item is dependent on the tier and amount of the bar used and the upgrade tier of the item.

Bar Progress Base [a 1] Progress +1 Progress +2 Progress +3 Progress +4 Progress +5 Progress Decorated[a 2]
Bronze bar 100 N/A N/A N/A N/A N/A N/A
Iron bar 200 160 N/A N/A N/A N/A N/A
Steel bar 300 240 N/A N/A N/A N/A N/A
Mithril bar 400 320 400 N/A N/A N/A N/A
Adamant bar 500 400 500 N/A N/A N/A N/A
Rune bar 600 480 600 720 N/A N/A 480
Orikalkum bar 700 560 700 840 N/A N/A 560
Necronium bar 800 640 800 960 1120 N/A 640
Bane bar 900 720 900 1080 1260 N/A 720
Elder rune bar 1000 800 1000 1200 1400 1600 800
  1. ^ All numbers are the progress for one bar
  2. ^ The progress required is equal to the progress needed to smith the item.

Each swing depletes the remaining heat by 10.

Progress gained depends on the remaining heat of the item. To progress as fast as possible, heat needs to be kept above 66%.

Heat Progress multiplier
High heat (>66%) 2x
Medium heat (>33%) 1.5x
Low heat (>0%) 1x
No heat (0%) 0.5x

There are a few other bonuses to progress. One main bonus is exceeding the material's base smithing level by a few levels, as shown in the in-game level guide. For example, at level 13 smithing, iron items are smithed 10% faster. Two other bonuses are Luminite injectors and the Smithing cape.