Tool Steel D2 Rectangular Bar 5" x 1/4" Retail Price

About D2|High-carbon, high-chromium cold work tool steel (1.5% C, 12% Cr). Semi-stainless. The chromium gives it better corrosion resistance than A2 or O1, though it's not truly stainless. Excellent wear resistance at HRC 58-62. Air-hardens with minimal distortion. The go-to steel for high-volume stamping dies, slitting knives, and forming tools where edge life matters most. Machines in the annealed condition with carbide. After hardening, it's grinding, EDM, or hard machining with CBN. Also popular for knife blades. Compare to A2 (tougher, less wear-resistant) and M2 (HSS, better hot hardness for cutting tools) and 440C stainless (true stainless, similar hardness but less wear-resistant).

About Rectangular Bar|Solid rectangular cross-section stock. Functionally similar to flat bar but typically available in thicker, chunkier profiles. The naming varies by supplier — what one calls rectangular bar, another calls flat bar. Used for keys, gibs, wear strips, brackets, and any part where a rectangular starting profile saves setup time versus milling from plate.