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IS 1570 (Part 2/Sec 1):1979 7C4 Steel: Specifications & Listings

IS 1570 (Part 2/Sec 1):1979 7C4: Unalloyed carbon steel designated 7C4 in IS 1570 (Part 2/Sec 1):1979, with carbon <=0.12% and manganese <=0.50%. Old designation C07. The standard was reaffirmed in 2004.

Category: Carbon Steel
Grade Details
GradeIS 1570 (Part 2/Sec 1):1979 7C4
Standard IS 1570 (Part 2/Sec 1):1979
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 11169 (Part 1) 7C4 IS 11169 (Part 1):2022 India No activity yet
SAE J403 1005 SAE J403:2001 USA No activity yet
SAE J403 1006 SAE J403:2001 USA No activity yet
SAE J403 1008 SAE J403:2001 USA No activity yet
SAE J403 1009 SAE J403:2001 USA No activity yet
SAE J403 1003 SAE J403:2009 USA No activity yet
SAE J403 1004 SAE J403:2009 USA No activity yet
SAE J403 1007 SAE J403:2009 USA No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 11169 (Part 1) 7C4 IS 11169 (Part 1):1984 Strong Match
BS 970 EN2A BS 970:1955 Strong Match
IS 1570 (Part 2/Sec 1) 5C4 IS 1570 (Part 2/Sec 1):1979 Strong Match
IS 11169 (Part 1) 5C4 IS 11169 (Part 1):1984 Strong Match
BS 970 EN2B BS 970:1955 Strong Match
BS 970 EN2A/1 BS 970:1955 Strong Match
SAE J403 1009 SAE J403:2014 Strong Match
SAE J403 1007 SAE J403:2014 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
<=0.12 <=0.50
Mechanical Properties
Tensile Strength 320-400 MPa
Elongation >=27%

More data from IS 1570 (Part 2/Sec 1):1979

From the standard
Mild steel sheet and strip 1 condition
ConditionTensile strength (MPa)Elongation, min (%)
Cold rolled and annealed300 to 38028
Elongation on a test piece 12.5 mm wide, gauge length 50 mm.
Source: IS 1570 (Part 2/Sec 1):1979, Edition 2.1 (Amendment 1, December 1989), Table 6

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