IS 11169 (Part 1):2022 18Cr4Mo2S3 Steel: Specifications & Listings
IS 11169 (Part 1):2022 18Cr4Mo2S3: Cold heading quality alloy case hardening steel 18Cr4Mo2S3 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 550 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
0.15-0.21
0.90-1.20
<=0.25
0.60-0.90
0.15-0.25
<=0.025
0.020-0.040
<=0.30
Mechanical Properties
Hardness, ferrite-pearlite (+FP)
140-187 HB
Tensile Strength, annealed (+AC)
<=550 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
550
60
+AC
over 10 to 40
550
60
+AR+C+AC
2 (incl.) to 5
550
62
+AR+C+AC
over 5 to 10
530
62
+AR+C+AC
over 10 to 40
530
62
+AR+C+AC+LC
2 (incl.) to 5
590
60
+AR+C+AC+LC
over 5 to 10
570
60
+AR+C+AC+LC
over 10 to 40
570
60
+AC+C
over 5 to 10
660
57
+AC+C
over 10 to 40
650
57
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
140 to 187 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
47
46
45
42
39
37
35
34
31
29
28
27
26
Minimum, HRC
39
37
34
30
27
24
22
21
-
-
-
-
-
Applies when ordered with the symbol H; otherwise for guidance only. Jominy test as per IS 3848, austenitizing at 880 ± 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
47
46
45
42
39
37
35
34
31
29
28
27
26
HH minimum
42
40
38
34
31
28
26
25
22
20
-
-
-
HL maximum
44
43
41
38
35
33
31
30
27
25
24
23
22
HL minimum
39
37
34
30
27
24
22
21
-
-
-
-
-
HH: the upper limit matches the H band upper limit; HL: the lower limit matches the H band lower limit. Austenitizing at 880 ± 5 °C.
Source: IS 11169 (Part 1):2022, Table B.7
Active IS 11169 (Part 1):2022 18Cr4Mo2S3 Listings on M-EX (For Sale)