A193 B16
A steel produced at the quenched and tempered state according to the United States standard ASTM A-193, it is used for linkages and bolts destined for the oil industry. Analytically similar to the 40CrMoV4-6 type of the European standard EN 10269. It has greater temperability than the previous type thanks to the higher amount of alloy elements.
References and Comparable Standards
Standard Reference: ASTM A 193
| EUROPE |
ITALY |
GERMANY |
FRANCE |
UK |
USA |
| EN 10083-3: 2006 |
(UNI 7845-78) |
(DIN 17200 - 86) |
(NF A 35-552-86) |
(BS 970 pt. 1 - 96) |
ASTM A 193 |
| Grade |
N° |
|
Werkstoff |
N° |
|
|
|
| - |
- |
- |
- |
- |
- |
- |
B16 |
Chemical Composition (Cast Analysis) (%)
| C |
Si |
Mn |
P/max |
S/max |
Cr |
Mo |
V |
Al/max |
| 0,36÷0,47 |
0,15 ÷ 0,35 |
0,45÷0,70 |
0,035 |
0,040 |
0,80 ÷ 1,15 |
0,50 ÷ 0,65 |
0,25 ÷ 0,35 |
0,015 |
Mechanical Properties - Quenched*
| Size (mm) |
Rp 0,2 (MPa) min |
Rm (MPa) min |
A4 (%) min |
Z (%) min |
Hardness max |
| d≤M64** |
725 |
860 |
18 |
50 |
321 HB or 35 HRC |
| M64<d≤M70** |
655 |
760 |
17 |
45 |
302 HB or 33 HRC |
* minimum tempering temperature 620°C
**thread diameter
Working Temperatures Recommended
| Operation |
°C |
| Hot forgings deformation |
900÷1150 |
| Soft annealing |
650÷700 |
| Quenching in oil |
925÷954 |
| Tempering |
650÷730 |
