MARCO STEEL AND ALUMINUM, INC.

ALLOY

4130 Hollow BarVarious Sizes
4130 NQ&T API 6A 75KRounds 2 ¾" thru 30 ½"
4130 NQ&T Square 13" thru 19"
4140 Cold Drawn Heat TreatedRounds ¾" thru 2 ¾"
4140 Cold Finish Annealed Hex Bar 1 ¾" & 2"
4140 Hot Rolled Annealed Rounds 3" thru 10 ½"
4140 Hot Rolled Heat Treated And Stress RelivedRounds 1 ¼" thru 9"
4140 HT TG&PRounds 1 ⅛" thru 3 7⁄16"
4140 Q&T F&RTRounds 9-½" thru 24"
4145 Heat Treated Rounds 4" thru 9-½"
4145 Hollow BarVarious Sizes
4145 Q&T F&RTRounds 10" thru 11"
4340 Hot Rolled AnnealedRounds 2" thru 18"
4340 Hot Rolled Heat TreatedRounds 3" thru 9"