Smelt ores into bars, then forge equipment. All smithing is done in sessions.
Hammers
Equip a hammer to multiply how many items you can smith per session. Higher-tier hammers require a higher Smithing level.
Tool
Level Required
Efficiency
Heirloom Hammer
1
4.50×
Bronze Hammer
1
1.00×
Iron Hammer
15
1.25×
Steel Hammer
30
1.50×
Mithril Hammer
55
1.75×
Dwarven Hammer
60
2.50×
Adamantite Hammer
70
2.00×
Runite Hammer
85
2.25×
Divine Hammer
85
3.00×
Hammer tier efficiency multiplier
Depending on the difference in tier between the tool used for smithing and the item you are smithing, you can receive an additional mult to your standard tool efficiency. The effect of this is that you can craft items with lower tiers potentially much faster than items with higher tiers if you have higher-tiered tools.
For normal tools, their tier is determined by their minimum level required to equip. For the Heirloom Hammer, its tier is defined by your current smithing level. The heirloom's tool efficiency itself is calculated separately as described in Heirlooms.
For items, their tier depends on the minimum required level for smithing.
The level ranges for each tier and the associated tools are defined as below:
The exact multiplier you get applied to your tool efficiency depends on the tier difference as calculated using the formula: Tierdifference=tooltier−itemtier. The tool efficiency is multiplied as per the table below (— indicates no mult applied)