Stainless Steel — The Workhorse

The most popular watch case material. Durable, corrosion-resistant, and takes both polished and brushed finishes beautifully.

🔩 STEEL GRADES

• 316L (Surgical Steel) — Used by most brands. Hardness: ~155 Vickers
• 904L (Super Austenitic) — Used exclusively by Rolex ("Oystersteel"). Superior corrosion resistance, higher polish

🆚 COMPARISON

316L → Corrosion: ★★★★☆ Polish: ★★★★☆ Cost: ★★☆☆☆

904L → Corrosion: ★★★★★ Polish: ★★★★★ Cost: ★★★☆☆

📝 FUN FACT

904L steel is used in the chemical industry for acid resistance. Rolex repurposed industrial-grade material for luxury.