You get what you pay for, not all ESR H13 is good H13.
Not all ESR H13 is good
Purchasing H13 die steel, most of customers have the ESR requirements, because we all thought the psychological, aluminum die-casting molds,tobe erosion early, cracks, most of this problem happen are because the quality of die steel, we always believe that as long as the purchase to the ESR H13, our quality will be guaranteed,however,often we are purchasing the thing which we call H13 ESR mould,it just work for a few thousands to ten thousand times.the problem of erosion & crack still not be solved, we still can’t find the reasons of depressed, in fact, high purity of high-quality die steel, produce aluminum die-casting molds, do thirty thousands to fifty thousand times,There should be no problem, at this moment, I think of a good proverb, you get what you pay for, not all ESR H13 is good H13.
If you want to know more about it,pleasec click the link,or see as below
1. Chemical composition
| C(％) | 0.32～0.45 | Si(％) | 0.80～1.20 | Mn(％) | 0.20～0.50 |
| P(％) | ≤0.030 | S(％) | ≤0.030 | Cr(％) | 4.75～5.50 |
| Mo(％) | 1.10～1.75 | V(％) | 0.80～1.20 |
2. Form of Supply
we can supply the round bar, flat bar, plate and square block. round bar can be sawn to your required lengths as one offs or multiple cut pieces. Steel plate and sheet rectangular pieces can be sawn from flat bar ,sheet or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.
- Round
- sheet
- Plate
- Square
Surface Finish: Black, Rough Machined, Turned or as per given requirements.
3. Applications
Tool Steel is used in hot forging dies, hot forging die inserts, hot gripper dies, hot nut tools, hot header dies, brass forging and pressing dies, hot forging aluminum base dies, aluminum casting and extrusion dies, zinc die casting dies, extrusion mandrels, plastic molds, cores, die holder blocks, hot press dies, hot work punches, etc.
4. Forging
For forging tool steel, first slowly Preheat to 750°C(1382°F), soak enough time, then rapidly heat to 1050-1100 °C(1922-2030°F). then start forging, ensure the forging temperature higher than 850°C(1562°F). Cool H13 tool steel must be slowly after H13 steel forging finished.
5. Annealing
Heat to 840-860°C(1544-1580°F), Soak thoroughly before furnace cool at a maximum rate of 20°C(68°F) / hour, Cool down to 600°C (1112°F). Then cool in air.
6. Stress Relieving
Befor make products, The Tool steel stress relieving is very necessary. When the tool steel is ground , heavily machined, cutting,milled , the relief of internal strains is necessary before hardening to minimise the possibility of distortion. for stress relieving, heat the steel component to 700°C(1292°F) carefully, Get enough soaking period . Then cool in the furnace or cool in air.
7. Hardening
first should preheat the steel parts to 780-820°C(1436-1508°F), Soak enough time, ensure soak thoroughly. then rapidly heat to 1000-1030°C(1832-1886°F), soak about 30 mins. cool in air or oil.
8. Tempering
Heat the tool steel parts to tempering temperature, soak enough time until to Soak thoroughly. The usual tempering temperature range is 400-650°C(752-1202°F), It depend on the tools hardness require and the operating temperature. H13 tempering data for your reference as below:
| Temperature [°C] | 400 | 500 | 550 | 600 | 650 |
| Hardness [HRc] | 54 | 56 | 54 | 49 | 47 |
9. Nitriding
On some special tool require, the higher hardness is required. Nitriding the H13 steel can get a hard surface case. after Nitriding , the H13 hot work tool steel will have a resistant to wear and erosion surface. Typical Nitriding data for your reference as below:
| Temperature | Time | Approx. Depth of Case |
| 525°C | 10 hours | 0.125mm |
| 525°C | 20 hours | 0.180mm |
| 525°C | 40 hours | 0.250mm |
| 525°C | 60 hours | 0.300mm |
10. Heat Treatment
H13 heat treatment, including heat treat temperature, rate of heating, cooling and soaking times. they depend on the the size and shape and your local Climatic conditions. So if can, we advise you contact your heat treatment provider get full guidance on heat treatment.
Ms Sharon Wan
Mobile/WhatsApp: 0086-13580960968
Tel: 0086-769-23190193
Fax: 0086-769-88705839
Email: Sharon@otaisteel.com
