Description of H11 Tool Steel Plate
H11 Tool Steel is a 5% chromium hot work steel that is characterized by excellent impact toughness. It contains less vanadium than the widely-used H13 hot work tool steel. This provides for the higher toughness, with some reduction in wear resistance and temper resistance. H11 hot work tool steel is deep-hardening, air-hardening steel that exhibits minimal size change during heat treatment. It has good resistance to thermal fatigue cracking (heat checking) and excellent resistance to gross cracking and thermal shock when the water cooled in service. H11 hot work tool steel is 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.
Specifications of H11 Tool Steel Plate
Element
|
Content (%)
|
Carbon
|
0.33 - 0.43
|
Chromium
|
4.75 - 5.5
|
Iron
|
Balance
|
Manganese
|
0.2 - 0.5
|
Molybdenum
|
1.1 - 1.6
|
Phosphorus
|
0.03 max
|
Silicon
|
0.8 - 1.2
|
Sulphur
|
0.03 max
|
Vanadium
|
0.3 - 0.6
|
Properties
|
Metric
|
Imperial
|
Hardness, Rockwell C (air cooled from 982°C, 45 mins)
|
52.5
|
52.5
|
Hardness, Rockwell C (air cooled from 1010°C, 45 mins)
|
56
|
56
|
Hardness, Rockwell C (air cooled from 1038°C, 45 mins)
|
57
|
57
|
Modulus of elasticity
|
207 GPa
|
30000 ksi
|
Modulus of elasticity (@538°C/1000°F)
|
159 GPa
|
23000 ksi
|
Modulus of elasticity (@204°C/400°F)
|
190 GPa
|
27500 ksi
|
Charpy impact (V-notch; air cooled from 1010°C;650°C temper temperature)
|
27.1 J
|
20.0 ft-lb
|
Charpy impact (V-notch; air cooled from 1010°C;370°C temper temperature)
|
33.9 J
|
25.0 ft-lb
|
Machinability (1% carbon steel)
|
75.0 - 80.0%
|
75.0 - 80.0%
|
Poisson's ratio
|
0.27-0.30
|
0.27-0.30
|
Applications of H11 Tool Steel Plate
- Hot punches
- Die casting dies
- Forging dies
- Hot shear blades
- Hot gripper dies
- Extrusion tooling