Toolman Special Steels is proud to produce and offer H12 steel. H12 hot work tool steel is a 5% chromium, general-purpose hot work steel that is characterized by excellent impact toughness. It contains less vanadium than the widely-used H13 hot work tool steel. Steel is a deep-hardening, air-hardening steel that exhibits minimal size change during heat treatment. It has good resistance to thermal fatigue cracking (heat cracking) and excellent resistance to gross cracking and thermal shock when water cooled in service. The addition of tungsten enhances its wear resistance while maintaining strength and toughness.
Steel Properties
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High wear resistance
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Good high temperature strength
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Extra- fine- structure without grain-boundary carbide
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Uniform spheroidizing microstructure
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Great cleanliness
Chemical Composition
| Element | C (%) | Si (%) | Mn (%) | P (≤ %) | S (≤ %) | Cr (%) | Mo (%) | V (%) | W (%) | Ni + Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| ASTM A681 | 0.30-0.40 | 0.80-1.25 | 0.20-0.60 | 0.03 | 0.03 | 4.75-5.50 | 1.25-1.75 | 0.20-0.50 | 1-1.70 | 0.75 |
Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HBW) | 235 max |
| Hardness After Quenching (HRC) | 53 min. |
Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 7.8 g/cm³ |
Modulus of Elasticity
| Temperature (℃) | Modulus of Elasticity (GPa) |
|---|---|
| 500 | 176 |
| 600 | 166 |
Thermal Properties
| Temperature (℃) | Thermal Expansion Coefficient (10^-6/℃) |
|---|---|
| 500 | 12.9 |
| 600 | 13 |
Thermal Conductivity
| Temperature (℃) | W/m•K |
|---|---|
| 500 | 28.3 |
| 600 | 29.3 |
HEAT TREATMENT AND PROCESSES
Heat treatment
| Soft annealing °C | Cooling | Hardness HB |
|---|---|---|
| 820 | Furnace | max. 235 |
| Hardening °C | Quenching | Hardness after quenching HRC |
|---|---|---|
| 1030 – 1130 | Oil or hot bath, 500 – 550 °C | 53 min |
| Tempering °C | HRC |
|---|---|
| 100 | 55 |
| 200 | 54 |
| 300 | 54.3 |
| 400 | 54.8 |
| 500 | 53 |
| 600 | 51 |
| 700 | 48 |
| 800 | 41 |
| 900 | 34 |
Applications
H12, / DIN 1.2606 /, AISI H12 / hot work steel is recommended for hot tooling applications where maximum resistance to cracking is required. Such applications include hot punches, die casting dies, forgings dies, Injection Moulding, hot shear blades, and extrusion tooling
Quality Assurance
Our H12,/ DIN 1.2606 /, AISI H12 / steel undergoes rigorous testing and quality control to meet international standards, ensuring consistent performance and reliability. Certificates and test reports are available upon request. Feel free to reach out to us for more information on our H12 steel products or to discuss your specific requirements. We're dedicated to providing top-quality steel solutions that meet your needs and exceed your expectations.
Manufacturing Range
| Products | Diameter (mm) |
|---|---|
| Hot Rolled bar | 8 - 65 |
| Forged and Turned bars | 65.2 - 500 |
| Forged Square Bars | 50 - 500 |
Flats
| THICKNESS | WIDTH |
|---|---|
| 6.00 mm - 410.00 mm | 20.00 mm - 700.00 mm |