S235JR Carbon Steel Round Bar (EN 10060)

General‑purpose mild carbon steel bar, good weldability. Widely used for general construction, bolts, fasteners and mechanical rough‑machining parts.

S355JR Low‑Alloy Round Bar (EN 10060)

High‑strength low‑alloy steel bar, for structural components, machinery parts and high‑load mechanical fabrications.

A36 Carbon Steel Round Bar

ASTM standard mild carbon bar, popular in American‑related projects for construction and general mechanical processing.

20# Quality Carbon Steel Round Bar (GB/T 699 / AISI 1020)

Low‑carbon quality carbon bar with excellent weldability, for mechanical parts, shaft blanks and forged components.

45# Quality Carbon Steel Round Bar (GB/T 699 / AISI 1045)

Medium‑carbon carbon steel bar with high tensile strength, widely used for shafts, gears and wear‑resistant machined parts.

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