Hardness Chart
| Steel | Core Strength After Hardening & Tempering Temper. Temperature (N/mm2) | Surface Hardness 90 Min 1076° F Melonite® |
|---|
| Name | Steel Number | 2 Hours | 6 Hours | HV 1 | HV 10 | HV 30 |
|---|---|---|---|---|---|---|
| Ck15 | 1.1141 | 600 | 550 | 350 | 300 | 200 |
| C45W3 | 1.1730 | 750 - 850 | 700 - 800 | 450 | 350 | 250 |
| Ck60 | 1.1221 | 750 - 950 | 700 - 800 | 450 | 350 | 250 |
| 20MnCr5 | 1.7147 | 800 - 950 | 800 - 900 | 600 | 450 | 400 |
| 53MnV8 | 1.5141 | 850 - 950 | 800 - 900 | 450 | 400 | 350 |
| 90MnV8 | 1.2842 | 1000 - 1200 | 900 - 1100 | 550 | 450 | 400 |
| 42CrMo4 | 1.7225 | 900 - 1200 | 900 - 1100 | 650 | 500 | 450 |
| X19NiCrMo4 | 1.2764 | 900 - 1100 | 900 - 1000 | 600 | 500 | 450 |
| 55NiCrMov6 | 1.2713 | 1200 - 1400 | 1150 - 1300 | 650 | 550 | 500 |
| 56NiCrMoV7 | 1.2714 | 1300 - 1500 | 1250 - 1400 | 650 | 550 | 500 |
| 50NiCr13 | 1.2721 | 1200 - 1350 | 1100 - 1200 | 600 | 500 | 450 |
| X20Cr13 | 1.2082 | 1000 - 1200 | 1000 - 1200 | > 900 | 600 | 450 |
| X35CrMo17 | 1.4122 | 1000 - 1200 | 1000 - 1200 | > 900 | 700 | 550 |
| X210Cr12 | 1.2080 | 1500 - 1700 | 1400 - 1600 | > 800 | 600 | 450 |
| X210CrW12 | 1.2436 | 1500 - 1800 | 1400 - 1650 | > 800 | 600 | 500 |
| X165CrMoV12 | 1.2601 | 1400 - 1900 | 1400 - 1700 | > 800 | 650 | 500 |
| 45CrMoW58 | 1.2603 | 1500 - 1800 | 1400 - 1700 | 800 | 700 | 600 |
| X32CrMoV33 | 1.2365 | 1700 - 1800 | 1600 - 1750 | > 900 | 850 | 700 |
| X38CrMoV51 | 1.2343 | 1700 - 1900 | 1500 - 1700 | > 900 | 850 | 700 |
| X37CrMoW51 | 1.2606 | 1700 - 1900 | 1600 - 1800 | > 900 | 800 | 700 |
| X30WCrV53 | 1.2567 | 1700 - 1900 | 1600 - 1800 | > 900 | 850 | 750 |
| X30WCrV93 | 1.2581 | 1500 - 1800 | 1500 - 1700 | > 900 | 850 | 800 |
