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
2.15-2.50
0.10-0.60
<=0.030
<=0.030
0.10-0.60
11.50-13.50
3.80-4.40
0.70-1.20
Mechanical Properties
Hardness
<=262 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
262
Cold drawn
277
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
1925 deg F (1052 deg C)
Austenitizing, controlled atmosphere furnace
1950 deg F (1066 deg C)
Austenitizing time
10 to 20 min
Quench medium
Air
Tempering temperature
400 deg F (204 deg C)
Minimum hardness after treatment
63 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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