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IS 11169 (Part 1):1984 20C8 Steel: Specifications & Listings

IS 11169 (Part 1):1984 20C8: Cold heading quality carbon steel 20C8 to IS 11169 (Part 1):1984, listed both for use without heat treatment and for quenching and tempering, supplied as wire, wire rod or bars of 2 to 100 mm diameter. Old designation C20. The standard was reaffirmed in 2004.

Category: Carbon Steel
Grade Details
GradeIS 11169 (Part 1):1984 20C8
Standard IS 11169 (Part 1):1984
ApplicationsCold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1)
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 11169 (Part 1) 20C8 IS 11169 (Part 1):2022 India No activity yet
SAE J403 1018 SAE J403:2001 USA No activity yet
SAE J403 1019 SAE J403:2001 USA No activity yet
SAE J403 1021 SAE J403:2001 USA No activity yet
SAE J403 1022 SAE J403:2001 USA No activity yet
SAE J403 1026 SAE J403:2001 USA No activity yet
BS 970 (Part 3) 070M20 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 1) 120M19 BS 970 (Part 1):1983 UK No activity yet
BS 970 EN2C BS 970:1955 UK No activity yet
BS 970 EN2D BS 970:1955 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 1) 070M20 BS 970 (Part 1):1983 Strong Match
SAE J403 1018 SAE J403:2014 Strong Match
SAE J403 1021 SAE J403:2014 Strong Match
SAE J403 1018 SAE J403:2001 Strong Match
SAE J403 1021 SAE J403:2001 Strong Match
SAE J403 1018 SAE J403:2009 Strong Match
SAE J403 1021 SAE J403:2009 Strong Match
BS 970 EN2C BS 970:1955 Strong Match
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Mn
0.15-0.25 0.60-0.90
Mechanical Properties
Tensile Strength (hardened and tempered) 540-690 MPa (16 mm) / 490-640 MPa (40 mm)
0.2% Proof Stress >=370 MPa (16 mm) / >=295 MPa (40 mm)
Elongation >=20% (16 mm) / >=22% (40 mm)
Hardness, annealed <=150 HB

More data from IS 11169 (Part 1):1984

From the standard
Other composition limits from the clauses and notes
Sulphur and phosphorus, maximum
0.035 percent each; other limits by agreement
Deoxidation
Rimmed, semi-killed or killed, as ordered
Nitrogen, when ordered rimmed
Below 0.008 percent
Also listed for quenching and tempering
Same carbon and manganese limits (Table 2)
Elements not specified, maximum
Cr 0.15, Ni 0.15, Cu 0.15, Sn 0.02, Mo 0.05, V 0.05 percent; total 0.40
Narrower carbon and silicon ranges may be agreed between purchaser and manufacturer; elements not listed are not added except by agreement or to finish the heat.
Source: IS 11169 (Part 1):1984, clauses 4.1.2, 4.1.3, 4.2 and 4.4, Table 1, Table 2 notes
Hardness in the annealed condition 1 condition
Annealed, maximum
150 HB
Brinell hardness for products delivered in the annealed condition.
Source: IS 11169 (Part 1):1984, Table 5, clause 8.1
Hardened and tempered, by ruling section 2 sections
Tensile strength (MPa)0.2% proof stress, min (MPa)Elongation, min (%)Reduction of area (%)Izod impact (J)Limiting ruling section (mm)
540-69037020453916
490-64029522503940
Recommended values for guidance (clause 9.2.1), on test pieces taken from rounds in the direction of the fibre.
Source: IS 11169 (Part 1):1984, Table 6

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