H11 4Cr5MoSiV SK6 1.2343 TOOL STEEL

H11 4Cr5MoSiV SK6 1.2343 TOOL STEEL

Tool Steel H11 is a chromium-based steel alloy from the “H” family of steels according to the AISI classification system.  Because of its excellent resistance to thermal fatigue cracking, in addition to strong resistance to gross cracking and thermal shock, H11 is generally used in highly stressed structural parts such as aircraft landing gear and is also widely used as a structural material for critical components in aircraft missiles. H11 is also recommended for hot tooling applications where maximum resistance to cracking is required. Such applications include hot punches, die casting dies, forging dies, hot shear blades, hot gripper dies, and extrusion tooling. The tools produced from chromium hot-work steels can be cooled using water without damage as these steels have low carbon and alloy contents.

H11 RELATED STANDARD & EQUIVALENT GRADE

H11 CHEMICAL COMPOSITION

H11 MECHENICAL PROPERTY

Heat treatment process and hardness

The heat treatment process of H11 hot work die steel usually includes quenching, tempering and other steps. Oil quenching temperature 1000-1040℃, 580-600℃ tempering, after quenching and tempering hardness can reach HRC48-50. You can also choose different tempering temperatures according to your product and hardness needs.

THE DIFFERENCE BETWEEN H11 AND H13

Compare to AISI H13, AISI H11 tool steel is with less vanadium than these too grade steel. This gives AISI H11 steels higher toughness, with some reduction in wear resistance and temper resistance.  AISI H11 tool steel is a deep-hardening, air-hardening steel and AISI H11 alloy steel could be deep hardened by heat treatment and air-quenching. That gives minimal size change during heat treatment. AISI H11 how work steel also has super resistance to thermal fatigue cracking and superb resistance to gross cracking and thermal shock when water cooled in service.