Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Mn
P
S
Si
Cr
V
Mo
2.05-2.40
0.10-0.60
<=0.030
<=0.030
0.10-0.60
11.00-13.00
0.15-1.00
0.70-1.20
Mechanical Properties
Hardness
<=255 HB
Condition
Annealed (maximum Brinell hardness)
More data from ASTM A681:2008
From the standard
Maximum hardness in delivery condition2 conditions
Condition
Maximum hardness (HB)
Annealed
255
Cold drawn
269
Maximum Brinell hardness (BHN).
Source: A681:2008, Table 2
Heat treatment and response to hardeninghardening test conditions
Preheat temperature
1500 deg F (816 deg C)
Austenitizing, salt bath
1800 deg F (982 deg C)
Austenitizing, controlled atmosphere furnace
1825 deg F (996 deg C)
Austenitizing time
10 to 20 min
Quench medium
Air
Tempering temperature
400 deg F (204 deg C)
Minimum hardness after treatment
62 HRC
Austenitizing temperatures are stipulated for the response to hardening test only. Time in controlled atmosphere furnaces is 10 to 20 minutes for D types.
Source: A681:2008, Table 3
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