IS 11169 (Part 1):2022 20Ni6Cr3Mo3S3 Steel: Specifications & Listings
IS 11169 (Part 1):2022 20Ni6Cr3Mo3S3: Cold heading quality alloy case hardening steel 20Ni6Cr3Mo3S3 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 610 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
Ni
P
S
Si
0.16-0.23
0.60-0.90
<=0.25
0.50-0.90
0.25-0.35
1.40-1.70
<=0.025
0.020-0.040
<=0.30
Mechanical Properties
Hardness, ferrite-pearlite (+FP)
149-201 HB
Tensile Strength, annealed (+AC)
<=610 MPa (over 5 to 25 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
610
58
+AC
over 10 to 25
610
58
+AR+C+AC
2 (incl.) to 5
610
60
+AR+C+AC
over 5 to 10
590
60
+AR+C+AC
over 10 to 25
590
60
+AR+C+AC+LC
2 (incl.) to 5
650
58
+AR+C+AC+LC
over 5 to 10
630
58
+AR+C+AC+LC
over 10 to 25
630
58
+AC+C
over 5 to 10
730
55
+AC+C
over 10 to 25
720
55
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 25 mm
149 to 201 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
49
49
48
48
47
47
46
44
41
39
38
37
36
Minimum, HRC
41
40
39
36
33
30
28
26
23
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
49
49
48
48
47
47
46
44
41
39
38
37
36
HH minimum
44
43
42
40
38
36
34
32
29
27
26
25
24
HL maximum
46
46
45
44
42
41
40
38
35
33
32
31
30
HL minimum
41
40
39
36
33
30
28
26
23
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 20Ni6Cr3Mo3S3 Listings on M-EX (For Sale)