hey guys, and gals if there is any. Im a man of few words so here it goes, im in school right now(medical, not english and grammer lol) and they are remodeling a building, well there is TONS of scrap angle iron they are throwing away and its the perfect thickness for knives that i like, i cant forge up here due to living in an apartment. i cut my blades out and then shape with a grinder, my question is angle iron to soft for decent knives(i want a good sharp durable knife for camping) is there a way i can harden it? thanks