51CrV4 1.8159 Bright Spring Steel Rod
We can supply bright steel rod after +QT heat treatment.
Ground bright steel
We supply ground bright steel according to DIN EN 10278 to tolerance class IT 6.
Turned/Peeled bright steel
We supply peeled round material according to DIN EN 10278 in tolerance class IT 11 or IT 9. Other tolerances can be supplied upon request.
Polished bright steel
The first stage, if the material is unfinished, starts with a rough abrasive (perhaps 60 or 80 grit) and each subsequent stage uses a finer abrasive, such as 120, 180, 220/240, 320, 400 and higher grit abrasives, until the desired finish is achieved.
Drawn bright steel
Drawn bright steel is produced from hot-rolled steel bar or wire by chipless drawing.
We supply drawn bright steel in a wide range of cross-sectional shapes according to DIN EN 10278 in tolerance class IT 11 or IT 9.
Chemical composition
| Name | Number | C | Si | Mn | P | S | Cr | V |
| max. | max. | |||||||
| 51CrV4 | 1.8159 | 0,47-0,55 | max.0,40 | 0,70-1,10 | 0,025 | 0,025 | 0,90-1,20 | 0,10-0,25 |
Mechanical properties in different treatment conditions
| Quenched and tempered Q+T | |||||
| Heat treatment diameter in mm |
0.2% proof stress(Rp 0.2) min. N/mm² |
Tensile strength in N/mm² Rm min. |
Elongation at fracture in % A min. |
Reduction of area at fracture in % Z min. |
Notch impact energy (ISO-V) in J KV min. |
| ≤ 16 >16≤ 40 >40≤ 100 >100≤ 160 >160≤ 250 |
900 800 700 650 600 |
1100-1300 1000-1200 900-1100 850-1000 800-950 |
9 10 12 13 13 |
40 45 50 50 50 |
30 30 30 30 30 |
Hardness
| Soft annealed A HB |
| max. 248 |
Heat treatment Temperatures in ℃
| Quenching temperature in the end-quench test | Normalising | Hardening | Quenching medium | Tempering |
| 850 | 840 – 880 | 820 – 860 | Oil | 540 – 680 |
Hardenability in the end-quench test Hardness in HRC
Distance from quenched end in mm
| Type | 1.5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | |
| H | max. | 65 | 65 | 64 | 64 | 63 | 63 | 63 | 62 | 62 | 62 | 61 | 60 | 60 | 59 | 58 |
| min. | 57 | 56 | 56 | 55 | 53 | 52 | 50 | 48 | 44 | 41 | 37 | 35 | 34 | 33 | 32 | |
| HH | max. | 65 | 65 | 64 | 64 | 63 | 63 | 63 | 62 | 62 | 62 | 61 | 60 | 60 | 59 | 58 |
| min. | 60 | 59 | 59 | 58 | 56 | 56 | 54 | 53 | 50 | 48 | 45 | 43 | 43 | 42 | 41 | |
| HL | max. | 62 | 62 | 61 | 61 | 60 | 59 | 59 | 57 | 56 | 55 | 53 | 52 | 51 | 50 | 49 |
| min. | 57 | 56 | 56 | 55 | 53 | 52 | 50 | 48 | 44 | 41 | 37 | 35 | 34 | 33 | 32 | |
