AISI H21 Tool Steel: Guide to High-Temperature Performance & Uses
If you work with tools that face sustained mid-to-high temperatures—like hot extrusion dies, large forging tools, or high-volume plastic molds—AISI H21 tool steel is a reliable solution. As a chromium-tungsten-molybdenum hot-work tool steel, it’s designed to keep its strength, toughness, and shape even when exposed to heat up to 600°C. In this guide, we’ll break down […]














