H10 steel DIN 1.2365 is a hot work tool steel known for its excellent toughness, resistance to thermal fatigue, and ability to withstand high temperatures. Hot work, chromium-molybdenum type tool steel that exhibits excellent resistance to softening at elevated tempertaure. In addition to its superior anti-tempering softening resistance, this premium hot work tool steel produced by Toolman has outstanding thermal fatigue resistance and can be water cooled during the use.. It is commonly used in applications requiring significant impact and heat resistance, making it ideal for hot forging, extrusion, and die-casting applications.
Properties
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High toughness
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Extreme high temperature strength
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High temperature creep resistance
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High temperature softening resistance
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Fine crystallisation
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Uniform spheroidizing microstructure
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Good cleanliness
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Tungsten-free special hot work tool steel on a CrMoV base with good toughness. Insensitive to thermal shock, and thus not susceptible to heat cracking. Particularly suitable for water cooling.
Chemical Composition
| Element | C (%) | Si (%) | Mn (%) | P (≤ %) | S (≤ %) | Cr (%) | Mo (%) | V (%) |
|---|---|---|---|---|---|---|---|---|
| Value | 0.28-0.35 | 0.10-0.40 | 0.15-0.45 | 0.03 | 0.03 | 2.70-.3.20 | 2.60-3.00 | 0.40-0.70 |
Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HBW) | 229 max (Annealed) |
| Hardness After Quenching (hardenability) (HRC) | 47 min (Annealed) |
| Yield Strength | 1000 MPa |
| Tensile Strength | 1200 MPa |
| Elongation | 10% |
| Impact Toughness | 25 J (at room temperature) |
Physical Properties
| Property | Value |
|---|---|
| Density (g/cm³) | 7.8 g/cm³ |
Modulus of Elasticity
| Temperature (°C) | GPa |
|---|---|
| 500 | 176 |
| 600 | 165 |
Thermal Properties
| Temperature (℃) | Thermal Expansion Coefficient (10^-6/℃) |
|---|---|
| 500 | 13.2 |
| 600 | 13.4 |
Thermal Conductivity
| Temperature (℃) | W/m•K |
|---|---|
| 500 | 30.1 |
| 600 | 29.7 |
Heat treatment
| Heat Treatment | Temperature | Duration | Cooling |
|---|---|---|---|
| Stress Relieving | Approx. 650 °C (annealed) Approx. 550 °C (hardened & tempered) |
1 hour per 50 mm wall thickness | Furnace |
| Soft Annealing | 800 °C | 1 hour per 25 mm wall thickness | Furnace |
| Hardening | 1040 °C | 30 seconds per mm wall thickness | Max. 52 HRC in oil, hot bath, protective atmosphere, vacuum, or air |
| Tempering | See tempering curve | 1 hour per 25 mm wall thickness | Air |
| Working Hardness | 30–48 HRC pre-heating of the tools = 250–350 °C |
| Tempering °C | HRC |
|---|---|
| 100 | 51 |
| 200 | 50.5 |
| 300 | 50 |
| 400 | 50 |
| 500 | 53 |
| 550 | 51 |
| 600 | 48 |
| 650 | 41 |
| 700 | 29 |
Applications
- Dies
- Tools for the production of screws & forging machines
- Highly stressed extruding tools for light metal processing - mandrels, pressing die cast moulds.
- Extruder tools including pipe extruders, such as extrusion stems, liners and die holders.
- Part stamping dies for non-ferrous heavy metals, forging die and press die inserts, forging tools for Hatebur presses.
- Die-casting moulds for non-ferrous heavy metal pressure die-casting.
- Hot Shearing Blades
Quality Assurance
Our H10, / DIN 1.12365 /, AISI H10 / 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 H10 - 1.2365 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 |
Frequently Asked Questions
We manufacture H10 / DIN 1.2365 / AISI H10 as a chromium-molybdenum hot work tool steel with excellent toughness, resistance to thermal fatigue and strong resistance to softening at elevated temperatures. It is designed for demanding tooling exposed to heat, impact and repeated thermal loading.
We supply H10 for dies, screw-production tooling, forging-machine tools, extrusion stems, liners, die holders, forging dies, press-die inserts, die-casting moulds for non-ferrous metals and hot-shearing blades.
Our published working-hardness range for H10 is 30–48 HRC, with tool preheating at 250–350°C. After hardening at 1040°C, the material can reach up to approximately 52 HRC, depending on the quenching method.
We specify soft annealing at 800°C, stress relieving at approximately 650°C in the annealed condition or 550°C when hardened and tempered, and hardening at 1040°C. Quenching may be carried out in oil, a hot bath, protective atmosphere, vacuum or air.
Our H10 steel offers high toughness, very high temperature strength, creep resistance, resistance to softening, fine crystallisation, a uniform spheroidised microstructure and good cleanliness. It is also tungsten-free and relatively insensitive to thermal shock.
We manufacture hot-rolled H10 bars from 8–65 mm diameter, forged and turned bars from 65.2–500 mm, and forged square bars from 50–500 mm. Flats are available from 6–410 mm thickness and 20–700 mm width.
Yes. We carry out rigorous testing and quality control on our H10 / 1.2365 steel and provide certificates and test reports on request. This helps manufacturers verify the supplied material before downstream machining, heat treatment or tooling production.
