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Hot Rolled Spring Steel (IS : 3431-1965)

Designation of Steel Grade C % Mn % Si % S % Max. P % Max. Cr % V % Typical Applications
50 Cr IV 23 1 0.45-
0.55		 0.50-
0.80		 0.10-
0.35		 0.050 0.05 0.90-
1.20		 0.1-
0.30		 In the form of bars and flats for volute, helical and leminated spring for automotive suspension
55 Si 2 Mn 90 2 0.50-
0.60		 0.80-
1.00		 1.50-
2.00		 0.050 0.50 - -