Monster Hunter World Iceborne has re-worked the Augment System for weapons. In this guide I will go over the Augment System along with the required materials.
Monster Hunter World Iceborne Augment System Guide
Back inMonster Hunter World, a weapon could be augmented a set amount of times depending on its rarity. Each augment type was weighted the same. InIceborne, each augment type has a different “weight” or cost assigned to them and each weapon’s socket number is based on rarity. Below you will find eachAugment’s, sockets, costs and limits.
Yellow Text means that it was added in the Rajang update.

Augment’s Socket Usage & Benefit
Rarity 10 Augment’s Costs in Iceborne
Sockets' Limits & Costs
Starts at 5 sockets can be augmented to 7
Previous limit of 7 sockets can now be augmented to 9

Attack’s Limits & Costs
Affinity’s Limits & Costs
Defense’s Limits & Costs
(Decoration) Slot’s Limits & Costs
Health’s Limits & Costs
Element/Status Effect Up’s Limits & Costs
Custom Upgrade Limits
Custom Upgrade now can be done 6 times compared to 5 before the Rajang Update.
Rarity 11 Augments Costs in Iceborne
Starts at 4 sockets can be augmented to 5
Previous limit of 5 sockets can now be augmented to 6

Rarity 12 Augments Costs in Iceborne
Starts at 3 sockets can be augmented to 4
Previous limit of 4 sockets can now be augmented to 5
If you enjoyed this MHW guide be sure to check out more inMonster Hunter World Iceborne All Layered Armor GuideandMonster Hunter World Iceborne Mantles & Boosters Upgrade Guide. You can also track all the Iceborne Pendants in ourMonster Hunter World Iceborne All Pendants Guide.