Designation by Standards
| Steel No. | DIN | EN | AISI | JIS | ГОСТ |
| 1.2344 | - | X40CrMoV5-1 | H13 | SKD61 | 4Ch5MF1S |
Chemical Composition (in weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
| 0.40 | 1.05 | 0.40 | 5.51 | 1.35 | - | 1.00 | - | - |
Description
This alloy is one of the hot work, chromium type tool steels. It also contains molybdenum and vanadium as strengthening agents. The chromium content assists this alloy to resist softening if used at higher temperatures. Secondary hardening steels with good tempering reistance. It maintains high hardness and strength at elevated temperatures. Good resistance to thermal fatigue, erosion and wear. Steel with very high thoughness and good ductilityand hardenability. Tools can be water cooled.
Applications
H13 steel finds applications for hot die work, die casting and extrusion dies, wear resisting tools, pressure die casting tools, pressing tools for light and heavy metal. For the highest requirements we recommended ESR EFS.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 215
Density [g/cm3]: 7.78
Thermal conductivity [W/m.K]: 25.0
Electric resistivity [Ohm mm2/m]: 0.52
Specific heat capacity[J/g.K]: 0.46
Thermal conductivity [W/m.K]M
| 20oC | 500oC | 600oC |
| 25 | 28.5 | 29.3 |
Density [g/cm3]
| 20oC | 500oC | 600oC |
| 7.78 | 7.64 | 7.60 |
Electric resistivity [Ohm mm2/m]
| 20oC | 500oC | 600oC |
| 0.52 | 0.86 | 0.96 |
Specific heat capacity[J/g.K]
| 20oC | 500oC | 600oC |
| 0.46 | 0.55 | 0.59 |
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC | 20-200oC | 20-300oC | 20-400oC | 20-500oC | 20-600oC | 20-700oC | 20-800oC |
| 10.7 | 11.9 | 12.2 | 12.5 | 12.7 | 13.1 | 13.5 | 13.7 |
Soft Annealing
Heat to 760-810oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 229.
Hardening
Harden from a temperature of 1020-1060oC followed by oil, air quenching or warm bath (450-550oC). Hardness after quenching is 52-56 HRC.
Tempering
Tempering temperature: See the diagram bellow.
Tempering Temperature (oC) vs. Hardness (HRC) vs. Tensile Stregth (N/mm2)
| 100oC | 200oC | 300oC | 400oC | 500oC | 550oC | 600oC | 650oC | 700oC |
| 53 | 52 | 51 | 52 | 54 | 53 | 50 | 43 | 31 |
| 1845 | 1790 | 1730 | 1790 | 1910 | 1845 | 1680 | 1360 | 995 |
Forging
Hot forming temperature: 1100-900oC.
Machinability
Machinability of H13 is medium to good. It rates as 75 % that of the W group water hardening tool steels which are low alloy and of generally good machinability.
Corrosion Resistance
This alloy has some corrosion resistance due to its chromium content. However it is still a steel and will rust unless given protective coating.
Welding
This alloy is weldable. Contact the alloy supplier for information on welding procedures.
Remark
All technical information is for reference only.