Chrome-boron alloy steel generally used in bolts production.
Standard Reference: EN 10263-4: 2017
| EUROPE | ITALY | GERMANY | FRANCE | UK | USA | ||
|---|---|---|---|---|---|---|---|
| EN 10263-4: 2001 | (UNI 7845-78) | (DIN 17200-86) | (NF A 35-552-86) | (BS 970 pt.3-96) | ASTM A 29 | ||
| Grade | N° | Werkstoff | N° | ||||
| 32CrB4 | 1.7076 | - | - | - | - | - | - |
| C | Si/max | Mn | P/max | S/max | Cr | B | Cu |
|---|---|---|---|---|---|---|---|
| 0,30÷0,34 | 0,30 | 0,60÷0,90 | 0,025 | 0,025 | 0,90÷1,20 | 0,0008÷0,0050 | 0,25 |
| Size (mm) |
Spheroidized Annealed (+AC) or Spheroidized Annealed+Peeled (+AC +PE) |
Cold Drawn+ Spheroidized Annealed (+U +C +AC) |
Cold Drawn + Spheroidized Annealed + Skin Pass (+U +C +AC +LC) |
Spheroidized Annealed + Cold Drawn (+AC +C) |
||||
|---|---|---|---|---|---|---|---|---|
| Rm (MPa) max | Z (%) min | Rm (MPa) max | Z (%) min | Rm (MPa) max | Z (%) min | Rm (MPa) max | Z (%) min | |
| 2<d≤5 | - | - | 550 | 64 | 590 | 62 | - | - |
| 5<d≤40 | 550 | 62 | 530 | 64 | 570 | 62 | 670 | 57 |
| Limits of range | Hardness HRC at a distance from quenched end of test pieces (mm) | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1,5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | |||||||
| +H | Max | 56 | 56 | 55 | 55 | 55 | 54 | 53 | 53 | 51 | 49 | 45 | 42 | 40 | 38 | - | |||||
| Min | 49 | 48 | 47 | 46 | 46 | 45 | - | - | - | - | - | - | - | - | - | ||||||
