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Q345B Round Bar, grades Q345B / S355JR

Q345B Round Bar

Grades Q345B / S355JR

Spec Diameter 12–250 mm · Length 6–12 m

Category Round Bar & Wire Rod

Documents Mill test certificate for every heat number

Higher strength round bar for structural and machined parts.

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Understanding Steel Grades: A Practical Buyer’s Guide — Q235B, A36, SS400 — what do the designations really mean, and how do you pick the right grade for your project?