IS 1570 (Part 2/Sec 1):1979 50C4 Steel: Specifications & Listings
IS 1570 (Part 2/Sec 1):1979 50C4: Unalloyed carbon steel designated 50C4 in IS 1570 (Part 2/Sec 1):1979, with carbon 0.45-0.55% and manganese 0.30-0.60%. Old designation C50. The standard was reaffirmed in 2004.
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
0.30-0.60
Mechanical Properties
Tensile Strength
660-780 MPa
Elongation
>=13%
Typical Available Sizes
Round Bar
16-300 mm dia
Flat Bar
25-150 mm width
Sizes are indicative. Contact seller for exact availability.
More data from IS 1570 (Part 2/Sec 1):1979
From the standard
Cold-drawn bars, tensile by size4 size ranges
Size (mm)
Tensile strength, min (MPa)
Elongation, min (%)
Up to 20
670
7
Over 20 to 40
630
8
Over 40 to 63
610
9
Over 63
590
10
Table 3 of the standard prints the old designation of this grade as C40; Tables 2 and 4 give C50.
Source: IS 1570 (Part 2/Sec 1):1979, Edition 2.1 (Amendment 1, December 1989), Table 3
Hardened and tempered bars and forgings2 tensile ranges
Tensile strength (MPa)
Yield stress, min (MPa)
Elongation, min (%)
Limiting ruling section (mm)
700 to 850
460
15
63
800 to 950
540
13
30
Yield stress applies when specified.
Source: IS 1570 (Part 2/Sec 1):1979, Edition 2.1 (Amendment 1, December 1989), Table 4