IS 11169 (Part 1):2022 20C13BT Steel: Specifications & Listings
IS 11169 (Part 1):2022 20C13BT: Cold heading quality boron alloyed steel 20C13BT 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 cold drawn, annealed and skin passed is 630 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 (%)
B
C
Cr
Cu
Mn
P
S
Si
0.0008-0.005
0.17-0.23
<=0.30
<=0.25
1.10-1.40
<=0.025
<=0.025
<=0.30
Mechanical Properties
Tensile Strength, cold drawn, annealed and skin passed (+AR+C+AC+LC)
<=630 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
Chromium
Where a maximum of 0.30 percent is specified, a minimum may also be agreed when ordering
Aluminium
0.020 to 0.050 percent may be added to improve cold heading
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.3 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 (%)
+AR+C+AC+LC
2 (incl.) to 5
630
55
+AR+C+AC+LC
over 5 to 40
630
55
+AC+C
over 5 to 40
630
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. In the +AR condition the tensile values do not suit the whole composition range; take care that they match the hardenability needs. Table C.7 heads the last reduction of area column as maximum; shown here as minimum.
Source: IS 11169 (Part 1):2022, Table C.7
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
48
48
48
47
46
44
40
36
29
25
21
-
-
-
-
Minimum, HRC
40
39
37
30
22
-
-
-
-
-
-
-
-
-
-
Applies when ordered with the symbol H; otherwise for guidance only. Jominy test as per IS 3848, austenitizing at 925 ± 5 °C.
Source: IS 11169 (Part 1):2022, Table C.10
Active IS 11169 (Part 1):2022 20C13BT Listings on M-EX (For Sale)