|
Form
|
Condition
|
Typical Erichsen Cup Depth
|
|
-
|
-
|
mm
|
|
Sheet 0.025-0.050 in.
|
Heat-Treated at 2150°F RAC
|
10.0-11.5
|
RAC- Rapid Air-Cooled WQ-Water-Quenched
Aged and Cold-reduced Hardness Data
| Form |
Condition |
Test Temperature |
Typical Hardness |
| - |
°F |
°C |
°F |
°C |
Rockwell |
Brinell |
| Hot-Rolled Bar |
Heat-Treated at 2165°F WQ |
Heat-Treated at 1185°C WQ |
RT |
RT |
91 HRBW |
190 |
| Aged 20 min at: |
Aged 20 min at: |
- |
- |
- |
- |
| 752°F |
400°C |
752°F |
400°C |
- |
138* |
| 932°F |
500°C |
932°F |
500°C |
- |
130* |
| 1112°F |
600°C |
1112°F |
600°C |
- |
130* |
| 1292°F |
700°C |
1292°F |
700°C |
- |
120* |
| 1472°F |
800°C |
1472°F |
800°C |
- |
105* |
| 1652°F |
900°C |
1652°F |
900°C |
- |
60* |
| 752°F |
400°C |
RT |
RT |
- |
190† |
| 932°F |
500°C |
RT |
RT |
- |
192† |
| 1112°F |
600°C |
RT |
RT |
- |
187† |
| 1292°F |
700°C |
RT |
RT |
- |
192† |
| 1472°F |
800°C |
RT |
RT |
- |
192† |
| 1652°F |
900°C |
RT |
RT |
- |
218† |
| Hot-Rolled Bar, Cold-Reduced from Initial Diameter of 0.242 in |
As-Heat-Treated at 2150°F RAC |
As-Heat-Treated at 1177°C |
RT |
RT |
92 HRBW |
- |
| reduced 5% |
reduced 5% |
RT |
RT |
92 HRBW |
- |
| reduced 10% |
reduced 10% |
RT |
RT |
19 HRC |
- |
| reduced 15% |
reduced 15% |
RT |
RT |
25 HRC |
- |
| reduced 20% |
reduced 20% |
RT |
RT |
30 HRC |
- |
| reduced 25% |
reduced 25% |
RT |
RT |
34 HRC |
- |
| reduced 30% |
reduced 30% |
RT |
RT |
37 HRC |
- |
| reduced 35% |
reduced 35% |
RT |
RT |
40 HRC |
- |
| reduced 40% |
reduced 40% |
RT |
RT |
40 HRC |
|
*Special Brinell hot hardness tests were made using a 2000 kg. load and 10mm tungsten carbide ball. Both the ball and specimen were help at temperature for 20 minutes before testing.
†Special Brinell hardness measured at room temperature using a 2000 kg. load and 10mm tungsten carbide ball.
RT=Room Temperature
HRBW = Hardness Rockwell “B”, Tungsten Indentor.
HRC = Hardness Rockwell "C".
RAC- Rapid Air-Cooled
WQ-Water-Quenched