Tool Steel Sourcing for Orlando, FL Toolrooms and Mold Shops

It depends on run length and the part being stamped. D2 is the high-carbon, high-chromium wear grade and is the right call for long production runs or abrasive material, because it holds a cutting edge far longer than A2. The tradeoff is that D2 is less tough, more prone to chipping under shock, and harder to grind and EDM. A2 is air-hardening with better toughness and far easier finishing, making it ideal for shorter runs, more delicate die details, or work that sees some impact. Both harden to similar hardness in the high 50s to low 60s HRC, but they behave very differently in service. For Orlando shops running medical or aerospace stamping where edge retention over thousands of cycles is the priority, D2 usually wins. For complex die details or shock-prone work, A2 is the safer, more forgiving choice. Match the grade to the failure mode you are most worried about.

H13 is a hot-work tool steel engineered to survive repeated heating and cooling without cracking, which is exactly the duty cycle of a die-casting die or a plastic-injection mold core. It resists heat checking, the network of fine surface cracks that forms when a tool is thermally cycled, and it keeps its strength at elevated temperature where ordinary tool steels would soften. H13 is typically run at a relatively moderate 44 to 52 HRC so it stays tough rather than brittle, since toughness matters more than peak hardness for thermal-fatigue resistance. For Orlando's medical-device and aerospace component molders, H13 also polishes and textures well, supporting the SPI cosmetic finishes those parts demand. When you need a tool that lives in a hot, cyclic environment for years, H13 is the proven answer, and most production mold bases and cores in the region are built from it.

If the tool itself is a flight or controlled-program item, or if your customer's quality system flows down the requirement, then yes, the heat treatment must come from a NADCAP-accredited source with documented, traceable process control. Much of the tooling that supports Orlando's aerospace and defense primes is itself production fixturing rather than flight hardware, in which case standard certified heat treat with material and process certs may suffice. The deciding factor is the contract flow-down, so read the purchase order requirements carefully. Either way, you want a supplier that runs vacuum heat treat in house or partners with an accredited furnace, because tool steels like A2 and H13 need tight control of austenitizing temperature, quench rate, and tempering to hit the specified hardness without distortion or retained austenite. Confirm the heat-treat certification path before you cut the tool, not after.

Once a tool steel is hardened into the high 50s or 60s HRC it is too hard for conventional machining, so finishing moves to grinding and EDM. Surface and jig grinders bring flats, bores, and locating features to size, often holding plus or minus 0.0002 inch on critical dimensions. Wire EDM cuts intricate hardened die details and mold inserts with no cutting force, and sinker EDM burns cavities and sharp internal corners that a cutter cannot reach. D2 is notably difficult to grind because of its carbide content, so an experienced shop manages wheel selection and feed to avoid grinding burn and microcracks. For Orlando mold work, polishing and texturing follow grinding to hit cosmetic SPI or VDI finish callouts. When sourcing locally, confirm the shop has in-house grinding and EDM rather than subcontracting it, because controlling those operations under one roof keeps precision tooling on schedule and on tolerance.