A2 Tool Steel Round Bar

Electric-Furnace Smelting(EF)→Ladle Furnace(LF)→Vacuum Degassing(VD)→ Argon protected ingot →Multidirectional Forging → (Concave forging →)Normalizing+Hydrogen Diffusion Annealing → Ultrasonic Flaw Detection →Queching+Tempering Prehardened

Forging of ASTM A2 Tool Steel

Heating A2 steel for forging must be done slowly and uniformly. Heat the steel A2 slowly to 700°C then more rapidly to 1050-1100°C. Avoid working below 899°C(1650°F). Reheat AISI A2 steels as often as necessary to maintain proper forging temperature. After forging cool very slowly in lime, mica, dry ashes or furnace. AISI A2 steel should always be annealed after forging.

AISI A2 Tool Steel Heat Treatment

• Stress relieving

After heavy grinding or machine it is advisable to stress relieve tool steel A2 to reduce the danger of cracking or distortion during subsequent heat treatments. Heat slowly to 670-700°C, soak for a minimum of two hours per 25mm of section then cool down in the furnace.

• Annealing

To prevent decarburization use a controlled atmosphere furnace or pack in a sealed container using some inert material. To anneal A2 tool steel for lowest hardness, heat slowly to 899°C(1650°F) and hold at this temperature for about two hours per inch of greatest cross-section. Cool steel A2 at a rate of 20°F (10°C) per hour to 650°C (1200°F) and reheat to 732°C (1350°F); hold 3 hours per inch of greatest cross-section; furnace cool at 20 degrees per hour to 593°C (1100°F); then furnace-cool to 482°C (900°F) and air-cool.

• Hardening

Preheating temperature: 1200-1380°F (650-750°C). Austenitizing temperature: 1700 -1780°F (925-970°C) but usually 1720-1760°F (940-960°C).

Dimensions
Block: 80-350 x 100-700 mm
Delivery Condition
EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Black surface or Machined surface, UT SEP1921 Class3 D/d

Steel Making

Ingot Production

Forged Bars

Machinary