Hot work tool steel DIN 1.2343/AISI H11
Equivalent Grades of 1.2343 steel
Standard | Grade |
AISI/SAE | H11 |
W.Nr/DIN | 1.2343 |
JIS | SKD6 |
GB | 4Cr5MoSiV |
Typical Chemical Composition (%)
C | Si | Mn | Cr | Mo | V |
0.33-0.42 | 0.80-1.20 | 0.20-0.50 | 4.80-5.50 | 1.10-1.60 | 0.30-0.60 |
Hot Forming
Forging: 1100 to 900℃, slowing cooling in furnace.
Heat Treatment of 1.2343/H11 steel
Annealing: 750 to 800℃, slow cooling in furnace (10-20℃/hr), down to 600℃, cooling in air. Hardness after annealing: max. 230 HB.
Stress relieving: 600 to 650℃, slow cooling in furnace. Hold in neutral atmosphere for 1 to 2hours.
Hardening: 1000 to 1040℃, oil/air, hold 15 to 30 minutes. Hardness , 52 to 56 HRC in oil, 50 to 54 HRC in air.
Tempering: 560 to 580℃. Slowly heating to tempering temperature right after hardening. Recommended to temper at least twice. The second tempering temperature shall be approx. 30℃ lower than the first tempering.
Tempering ℃ | 300 | 400 | 500 | 580 |
HRC | 53 | 53 | 54 | 50 |
* Hardening temperature: 1020℃, specimen size: dia50mm
Surface treatment
Nitriding: Suited for both bath and gas nitriding.
Properties of 1.2343/H11 steel
High impact strength, excellent hot tensile properties and deep hardening properties, insensitivity to thermal shocks. Water cooling available.
Applications of 1.2343/H11 steel
Heavy duty hot work tools and dies: mandrels, dies, and containers for metal tube and rod extrusion; hot extrusion equipment; tools and dies for the manufacture of hollow bodies, screws, rivets, nuts, and bolts. Die casting equipment, forming dies, die inserts, hot shear blades, and plastic moulding dies.
Available Size of Steel 1.2343/H11 | ||||
Round: | Dia 12-50mm | hot rolled | ||
Dia 50-600mm | forged | |||
Flat/Square: | Thickness | 8-40mm | hot rolled | |
20-350mm | hot forged | |||
Width | 800mm max |
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