IS 11169 (Part 1):2022 12Cr4Mo2 Steel: Specifications & Listings
IS 11169 (Part 1):2022 12Cr4Mo2: Cold heading quality alloy case hardening steel 12Cr4Mo2 to IS 11169 (Part 1):2022, for parts case hardened after cold heading or cold extrusion, supplied as wire rod, bars or wire of 2 to 100 mm. Maximum tensile strength in the annealed condition is 500 MPa. It can be ordered with hardenability requirements (H, HH or HL).
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Cr
Cu
Mn
Mo
P
S
Si
0.10-0.15
0.90-1.20
<=0.25
0.60-0.90
0.15-0.25
<=0.025
<=0.025
<=0.30
Mechanical Properties
Hardness, ferrite-pearlite (+FP)
135-185 HB
Tensile Strength, annealed (+AC)
<=500 MPa (over 5 to 40 mm)
More data from IS 11169 (Part 1):2022
From the standard
Other composition limitsfrom the table notes and clauses
Values
Maximum unless a range is given (ladle analysis)
Ordered with hardenability
Small deviations from these limits are allowed (not for sulphur and phosphorus): up to 0.01 percent for carbon and the Table 1 values for other elements
Deoxidation
Aluminium killed (clause 6.2)
Elements not listed are not added intentionally without the purchaser's agreement, except those used to finish the heat.
Source: IS 11169 (Part 1):2022, Table B.2 and its notes, clause 6.2
Tensile strength and reduction of area by delivery conditionby delivery condition and size
Delivery condition
Diameter (mm)
Tensile strength, max (MPa)
Reduction of area, min (%)
+AC
over 5 to 10
500
62
+AC
over 10 to 40
500
62
+AR+C+AC
2 (incl.) to 5
500
-
+AR+C+AC
over 5 to 10
480
64
+AR+C+AC
over 10 to 40
480
64
+AR+C+AC+LC
over 5 to 10
520
62
+AR+C+AC+LC
over 10 to 40
520
62
Codes: +AR as hot rolled, +PE peeled, +C cold drawn, +AC annealed to spheroidized carbides, +LC skin passed. For non-circular sections the properties are agreed between manufacturer and purchaser. Table B.5 heads the reduction of area columns for +AR+C+AC+LC and +AC+C as maximum; they are shown here as minimum, like every other table of the standard.
Source: IS 11169 (Part 1):2022, Table B.5
Hardness in the delivery condition1 condition
Treated to ferrite-pearlite structure (+FP), over 5 to 40 mm
135 to 185 HB
Brinell hardness range for bars delivered treated to a ferrite-pearlite structure.
Source: IS 11169 (Part 1):2022, Table B.5
Hardenability, end quench test (H)Hardness band
Hardness band (HRC, minimum to maximum) by distance from the quenched end (mm)
1.5
3
5
7
9
11
13
15
20
25
30
35
40
Distance from quenched end (mm)
1.5
3
5
7
9
11
13
15
20
25
30
35
40
Maximum, HRC
44
43
41
38
34
30
28
27
23
21
-
-
-
Minimum, HRC
36
34
30
26
22
-
-
-
-
-
-
-
-
Applies when ordered with the symbol H; otherwise for guidance only. Jominy test as per IS 3848, austenitizing at 870 ± 5 °C.
Source: IS 11169 (Part 1):2022, Table B.6
Restricted hardenability bands, HH and HL (HRC by distance from quenched end, mm)HH and HL ordering
Band
1.5
3
5
7
9
11
13
15
20
25
30
35
40
HH maximum
44
43
41
38
34
30
28
27
23
21
-
-
-
HH minimum
39
37
34
30
26
21
-
-
-
-
-
-
-
HL maximum
41
40
37
34
30
26
23
20
-
-
-
-
-
HL minimum
36
34
30
26
22
-
-
-
-
-
-
-
-
HH: the upper limit matches the H band upper limit; HL: the lower limit matches the H band lower limit. Austenitizing at 870 ± 5 °C.
Source: IS 11169 (Part 1):2022, Table B.7
Active IS 11169 (Part 1):2022 12Cr4Mo2 Listings on M-EX (For Sale)