497-AISI A-2
Shop 497-AISI A-2
Precision ground, standard size AISI A2 features 5% chromium air-hardening steel. These steels have high wear and abrasion resistance.
Features:
Dimensionally stable:
- The 5% chromium content makes this steel especially desirable for punches and dies to be used in long production runs since it gives the tools far longer life. Up to 50% more pieces per sharpening can be produced than with oil hardening steel.
- High wear resistance is also ideal for punches and dies to stamp silicon, stainless steels, monel metal and other types of abrasive material
- Maintains close dimensional accuracy throughout the heat treating process. The wide 75º hardening range make this virtually foolproof.
- Full-length identification eliminates confusion with other steels
- Starrett uses its own ground flat stock for many of its
precision tool parts
Specifications:
Furnished in 18" and 36" lengths, ground straight and parallel.
Hardening:
497 Air Hardening Ground Flat Stock has a wide hardening range of 1700ºF to 1775ºF, with 1750ºF recommended for most work. For heavier sections use the high side of the range. Heat uniformly throughout but do not soak longer than necessary. Cool in still air. No pre-heat is required if pack or atmosphere controlled furnace methods are used, but with the open furnace method a pre-heat of 1450ºF is recommended.
Tempering:
A tempering time of two hours at temperature is recommended. Use chart for selecting the desired Rockwell C hardness and corresponding tempering temperature. For maximum toughness, double temper for two hours at each temperature recommended. The following may also be used as a guide, depending on the type of work.