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IS 5517:1993 40C10S18 Steel: Specifications & Listings

IS 5517:1993 40C10S18: 40C10S18 is a steel in IS 5517:1993 (Steels for Hardening and Tempering), intended in general for forgings and machined parts for engineering or automobile purposes.

Category: Free Machining Steel
Grade Details
GradeIS 5517:1993 40C10S18
Standard IS 5517:1993
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
BS 970 (Part 3) 212A42 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 1) 212A37 BS 970 (Part 1):1983 UK No activity yet
BS 970 (Part 1) 212M36 BS 970 (Part 1):1983 UK No activity yet
BS 970 (Part 1) 216A42 BS 970 (Part 1):1983 UK No activity yet
BS 970 (Part 3) 216M36 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 1) 216M44 BS 970 (Part 1):1983 UK No activity yet
BS 970 (Part 1) 216M28 BS 970 (Part 1):1983 UK No activity yet
BS 970 (Part 1) 225M36 BS 970 (Part 1):1983 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 3) 212A42 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 212A37 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 212A42 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 212M36 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 216A42 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 3) 216M36 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 216M36 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 216M44 BS 970 (Part 1):1983 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 Si Mn S P
0.35-0.45 <=0.25 0.80-1.20 0.14-0.22 <=0.060
Mechanical Properties
Tensile Strength 600-750 MPa
Yield Strength (0.2% proof) 380 MPa min
Elongation >=18%
Izod Impact 41 J min
Hardness (annealed) <=200 HB
Condition Hardened and tempered, ruling section up to 60 mm

More data from IS 5517:1993

From the standard
Heat treatment temperatures 5 values
Hot working temperature
1200 to 850 °C
Normalising temperature
830 to 860 °C
Hardening temperature
830 to 860 °C
Quenching medium
Oil
Tempering temperature
550 to 660 °C
Source: IS 5517:1993 with Amendments 1 to 3, Table 4
Properties after hardening and tempering, by ruling section 2 sections
Tensile strength (MPa)0.2% proof stress, min (MPa)Elongation, min (%)Izod impact, min (J)Limiting ruling section (mm)
600 to 750380184160
700 to 850480174830
Values apply to test bars taken from rounds along the direction of rolling. Izod impact values are for fine grained steels.
Source: IS 5517:1993 with Amendments 1 to 3, Table 5
Hardness by delivery condition 2 conditions
As annealed (A), maximum
200 HB
As rolled (R), maximum
240 HB
Source: IS 5517:1993 with Amendments 1 to 3, Table 6

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