Most Zoro replicas in this collection are forged from 1045 carbon steel, a medium-carbon alloy that balances hardness with durability and is widely used in collectible-grade katana. Select premium models, such as the Yama Enma variant, step up to 1060 carbon steel, which offers a finer grain structure and slightly higher hardness. Both steels accept a visible hamon temper line and hold up well in display conditions. The choice between the two often comes down to whether a collector prioritizes a lighter, more affordable display piece or a denser blade with added structural rigidity.