O-4 Citation: O-4. Graphics and examples contributed by Dr. Kyung-Seok OH, POSCO. Related Posts Filter by Post type Post Page Category homepage-featured-top main-blog Blog Citations Sort by Title Relevance Cold Stamped or Hot Formed? Part II 1 T-48 Citation 1 W-11 Citation W-11. WorldAutoSteel. (2010) “ 1 J-25 Citation 1 Y-15 Citation 1 X-2 Citation 1 W-39 1 W-12 1 U-13 Citation U-13. 1 T-47 Citation 1