IS 11169 (Part 1):2022 35C7S3 Steel: Specifications & Listings
IS 11169 (Part 1):2022 35C7S3: Cold heading quality non-alloy steel 35C7S3 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 560 MPa. It can be ordered with hardenability requirements (H).
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
Cu
Mn
P
S
Si
0.32-0.39
<=0.25
0.50-0.80
<=0.025
0.020-0.035
<=0.30
Mechanical Properties
Tensile Strength, annealed (+AC)
<=560 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 10
560
60
+AC or +AC+PE
over 10 to 40
560
60
+AR+C+AC
2 (incl.) to 5
550
62
+AR+C+AC
over 5 to 10
540
62
+AR+C+AC
over 10 to 40
540
62
+AR+C+AC+LC
2 (incl.) to 5
590
60
+AR+C+AC+LC
over 5 to 10
580
60
+AR+C+AC+LC
over 10 to 40
580
60
+AC+C
over 5 to 10
670
-
+AC+C
over 10 to 40
660
-
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.4
Hardenability, end quench test (H)Hardness band
Hardness band (HRC, minimum to maximum) by distance from the quenched end (mm)
1
2
3
4
5
6
7
8
9
10
11
13
15
20
25
30
Distance from quenched end (mm)
1
2
3
4
5
6
7
8
9
10
11
13
15
20
25
30
Maximum, HRC
58
57
55
53
49
41
34
31
28
27
26
25
24
23
20
-
Minimum, HRC
48
40
33
24
22
20
-
-
-
-
-
-
-
-
-
-
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 C.9
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