Sure! Here’s a list of some of the most well-known global suppliers of 309 Grade Stainless Steel:

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Leading Global Suppliers of 309 Grade Stainless Steel

1. Outokumpu

   • A global leader in stainless steel manufacturing, known for high-quality products.

2. Allegheny Technologies Incorporated (ATI)

   • A major player in the specialty metals industry, producing various grades of stainless steel.

3. Thyssenkrupp AG

   • A diversified multinational with significant operations in steel production, including stainless steel.

4. Acerinox

   • A Spanish company and one of the world's leading stainless steel producers.

5. Nippon Steel Corporation

   • One of the largest steel manufacturers in Japan, offering a wide range of stainless steel products.

6. Jindal Stainless

   • An Indian company that is a leading international supplier of stainless steel, including 309 grade.

7. North American Stainless (NAS)

   • An American manufacturer specializing in stainless steel products.

8. Sandvik AB

   • A Swedish engineering company that produces a variety of metals, including a range of stainless steels.

9. POSCO

   • A South Korean steel-making company that offers various types of stainless steel.

10. Zhejiang Jinchuan Stainless Steel Co., Ltd.

    • A Chinese manufacturer with a significant presence in the stainless steel market, including 309 grade. ```

This list comprises prominent manufacturers who are recognized for their production and supply of stainless steel grades, including 309. Always check the latest industry reports or market analyses for any emerging players.