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Compare NM400, NM450 and NM500 wear resistant steel plates by hardness, wear resistance, applications, welding, fabrication and cost. Find the right grade for mining, construction and heavy-duty equipment.

Steel round bar is one of the most widely used semi‑finished metal products for machinery, construction, mining, automotive and heavy‑industry manufacturing. Two dominant production routes are hot‑rolled round bar and forged round bar. Many buyers get confused: which one delivers better toughness? When should I pay extra for forging? Can hot‑rolled replace forged bar? What size limits exist for each process?

8620 steel: optimal for case-hardened gears. Combines extreme wear resistance with shock absorption to prevent part failure.

Find reliable AISI 8620 equivalents: 20CrNiMo, 20NiCrMo2-2, SNCM220. Compare chemistry, hardenability, and sourcing to avoid supply chain disruptions.

AISI 8620: the case-hardening champion for gears & shafts. Hard surface, tough core, cost-effective. Learn key specs.

Achieve optimal 58-62 HRC case hardness in 8620 steel gears with precise carburizing and quenching. Prevent distortion and fatigue failure.