Tool 1 · Lever-Rule Slider
Slide the carbon content; watch the slow-cooled microstructure change
Hypoeutectoid steel, slow cooled: ferrite (0.02 % C) + pearlite (from 0.77 % C austenite)
Tool 2 · AISI–SAE Grade Decoder
Pick a grade; read it like a metallurgist
Pick a grade and press Decode.
Drill · Match the Heat Treatment to the Job
Every steel part gets a cooling path on purpose. Choose the right one.