More data from ASTM A681:2008
From the standard
Maximum hardness in delivery condition
2 conditions
| Condition | Maximum hardness (HB) |
|---|
| Annealed | 207 |
| Cold drawn | 241 |
Maximum Brinell hardness (BHN).
Source: A681:2008, Table 2
Heat treatment and response to hardening
hardening test conditions
Preheat temperature
1200 deg F (649 deg C)
Austenitizing, salt bath
1525 deg F (829 deg C)
Austenitizing, controlled atmosphere furnace
1550 deg F (843 deg C)
Austenitizing time
5 to 15 min
Tempering temperature
400 deg F (204 deg C)
Minimum hardness after treatment
64 HRC
Austenitizing temperatures are stipulated for the response to hardening test only.
Source: A681:2008, Table 3