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IS 1570 (Part 2/Sec 1):1979 50C12 Steel: Specifications & Listings

IS 1570 (Part 2/Sec 1):1979 50C12: Unalloyed carbon steel designated 50C12 in IS 1570 (Part 2/Sec 1):1979, with carbon 0.45-0.55% and manganese 1.10-1.40%. Old designation C50Mn1. The standard was reaffirmed in 2004.

Category: Carbon Steel
Grade Details
GradeIS 1570 (Part 2/Sec 1):1979 50C12
Standard IS 1570 (Part 2/Sec 1):1979
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
SAE J403 1548 SAE J403:2014 USA No activity yet
SAE J403 1552 SAE J403:2014 USA No activity yet
BS 970 (Part 1) 080M50 BS 970 (Part 1):1983 UK No activity yet
SAE J403 1049 SAE J403:2014 USA No activity yet
SAE J403 1053 SAE J403:2001 USA No activity yet
SAE J403 1547 SAE J403:2001 USA No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
SAE J403 1548 SAE J403:2014 Strong Match
SAE J403 1548 SAE J403:2001 Strong Match
SAE J403 1548 SAE J403:2009 Strong Match
SAE J403 1552 SAE J403:2014 Strong Match
IS 1570 (Part 2/Sec 1) 50C8 IS 1570 (Part 2/Sec 1):1979 Strong Match
SAE J403 1552 SAE J403:2001 Strong Match
SAE J403 1552 SAE J403:2009 Strong Match
BS 970 (Part 1) 080M50 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 Mn
0.45-0.55 1.10-1.40
Mechanical Properties
Tensile Strength >=720 MPa
Elongation >=11%

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

From the standard
Tubes, cold drawn 2 conditions
ConditionTensile strength, min (MPa)Yield stress, min (MPa)
Cold drawn and annealed520340
Cold drawn, or cold drawn and tempered70060
Elongation, min: 950 divided by the actual tensile strength in kgf/mm² on a gauge length of 5.65 times the square root of the cross-section, or 1100 divided by it on 4 times the square root. Table 8 of the standard prints this yield stress as 60 under MPa; it appears to be in kgf/mm², about 588 MPa.
Source: IS 1570 (Part 2/Sec 1):1979, Edition 2.1 (Amendment 1, December 1989), Table 8

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