32CrB4 – Nr.1.7076
Chrome-boron alloy steel generally used in bolts production
References and Comparable Standards
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 |
- |
- |
- |
- |
- |
- |
Chemical Composition (Cast Analysis) (%)
| 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 |
Mechanical Properties - Bars, Wire And Coils For Cold Heading
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 |
Hardness Limits (Jominy Test)
| 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 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
