The DH2F steel produced by Japan’s Datong Steel Co., Ltd. is a pre-hardened hot-worked mold steel. It is pre-hardened to HRC37-42 at the factory. DH2F can meet the needs of rapid mold making. It is often used in various aluminum-magnesium-zinc die-casting molds. High-hard plastic Mould. Such as: mobile phone shell mould, automobile lamp mould and engine mould. (C:0.39)
(Si:1.00)
(Mn:0.65)
(Cr:5.15)
(Mo:1.00)
(V:0.35) has been pre-hardened to 37～42HRC, no need for heat treatment
Suitable for molds and parts with complex shapes and precision
Excellent cutting performance, easy to process and engrave
It is expected to shorten the mold processing cycle and reduce the cost
If surface treatment is applied, the wear resistance and corrosion resistance can be further improved. 1. Aluminum, zinc die-casting mold
2. Die casting mold parts
3. Press chamber punch
4. Sprue sleeve
5. Plastic mold
6. Aluminum hot extrusion mould
7. Stamping die
8. Unloading board
9. Various mechanical parts Forging temperature °C Heat treatment conditions °C Hardness Transformation point °C
Annealing Quenching Tempering Annealing HB Quenching and tempering HRC Ac Ar Ms
1100~850 840~870
Air cooling 1000~1050
Air cooling 600~680 Air cooling ≤229 40 845~910 280
(Austrian Ironization)
1030°C
Factory state: HRC37-42
| Parameter Tools |
Tool material | Tool shape | Cutting oil | Infeed amount | Cut depth | Cutting speed (m/min) |
Sample size (mm) |
Hardness (HRC) |
Lifetime benchmark |
| Milling cutter | M20 | NP-100R | None | 0.075mm blade | 1.5mm | 66~165 | 80*50*200 | 40 | VBax=0.3mm |
| Drill head | SKH51 | Taper Shank Drill Bit Φ10,α=118° |
None | 0.1mm/rev | Hole depth 30mm | 20~40 | 80*50*200 | 40 | Tool melting loss |
| Friction speed (m/sec) | Abrasion (mm2Kgf10-7) | |
| DH2F | SKD61 | |
| 0.20 | 3.76 | 3.50 |
| 0.51 | 5.24 | 5.56 |
| 0.94 | 3.50 | 5.24 |
| 1.63 | 3.03 | 5.56 |
| 1.97 | 4.04 | 5.24 |
| 2.38 | 4.61 | 5.24 |
| Steel grade | Quality before test (gr) |
Quality after test (gr) |
Melt loss | |
| (gr) | (%) | |||
| DH2F | 27.33 | 23.18 | 4.15 | 15.2 |
| SKD61 | 27.12 | 23.39 | 3.73 | 13.9 |
(10-6/℃)
| Steel grade | 20～100℃ | 20～200℃ | 20～300℃ | 20～400℃ | 20～500℃ | 20～600℃ | 20～700℃ |
| DH2F | 8.9 | 10.8 | 11.9 | 12.6 | 13.1 | 13.7 | 13.9 |
| SKD61 | 8.6 | 10.1 | 11.4 | 12.2 | 12.8 | 13.3 | 13.6 |
Link to this article：What is DH2F steel? What are the applications of DH2F steel？
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