IS 11169 (Part 1):2022 25Cr4Mo2 Steel: Specifications & Listings
IS 11169 (Part 1):2022 25Cr4Mo2: Cold heading quality alloy steel 25Cr4Mo2 to IS 11169 (Part 1):2022 for quenching and tempering after cold heading or cold extrusion, supplied as wire rod, bars or wire of 2 to 100 mm. Maximum tensile strength annealed is 580 MPa. It can be ordered with hardenability requirements (H, HH or HL, CH).
Cold heading and cold extrusion of parts that are quenched and tempered; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, Annex C)
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
0.22-0.29
0.90-1.20
<=0.25
0.60-0.90
0.15-0.30
<=0.025
<=0.025
<=0.30
Mechanical Properties
Core Hardness (CH)
>=41 HRC up to 13 mm
Tensile Strength, annealed (+AC)
<=580 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)
Silicon
Lower silicon contents may be agreed when ordering, with due regard to the effect on properties such as hardenability
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 C.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 or +AC+PE
over 5 to 40
580
60
+AC+C+AC
2 (incl.) to 5
570
62
+AC+C+AC
over 5 to 40
560
62
+AC+C+AC+LC
2 (incl.) to 5
610
60
+AC+C+AC+LC
over 5 to 40
600
60
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.
Source: IS 11169 (Part 1):2022, Table C.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
45
50
Distance from quenched end (mm)
1.5
3
5
7
9
11
13
15
20
25
30
35
40
45
50
Maximum, HRC
52
52
51
50
48
46
43
41
37
35
33
32
31
31
31
Minimum, HRC
44
43
40
37
34
32
29
27
23
21
20
-
-
-
-
Applies when ordered with the symbol H; otherwise for guidance only. Jominy test as per IS 3848, austenitizing at 850 ± 5 °C.
Source: IS 11169 (Part 1):2022, Table C.9
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
45
50
HH maximum
52
52
51
50
48
46
43
41
37
35
33
32
31
31
31
HH minimum
47
46
44
41
39
37
34
32
28
26
24
23
22
22
22
HL maximum
49
49
47
46
43
41
38
36
32
30
29
28
27
27
27
HL minimum
44
43
40
37
34
32
29
27
23
21
20
-
-
-
-
HH: the upper limit matches the H band upper limit; HL: the lower limit matches the H band lower limit. Austenitizing at 850 ± 5 °C. Not applicable to steels ordered with a restricted range of carbon content.
Source: IS 11169 (Part 1):2022, Table C.11
Core hardening (CH)CH ordering
Austenitizing temperature
850 °C ± 5
Minimum core hardness, 90 percent martensite
41 HRC
Maximum diameter for 90 percent martensite in the core
13 mm
Applies when ordered with the symbol CH. The diameter is the one reached with the lowest hardenability of the grade; HH grades allow a larger diameter. A hardening time of at least 30 minutes at temperature is recommended.
Source: IS 11169 (Part 1):2022, Table C.12, clauses 8.2.4 and 8.2.6
Active IS 11169 (Part 1):2022 25Cr4Mo2 Listings on M-EX (For Sale)