Page 75 - PRODUCT CATALOGUE_with background music

IS 513 : 2008

Chemical Composition
Designation Grade SAIL Name C max Mn max S max P max

CRO H 0.25 1.7 0.45 0.050
CRI O

340 HSCR 26
0.15 0.60 0.040 0.050
390 HSCR 30

440 HSCR 35
CR2 D 0.12 0.50 0.035 0.040

CR3 DD 0.10 0.45 0.030 0.025
CR4 EDD 0.08 0.40 0.030 0.020

Al : 0.02-0.07% if Al-killed, Si>0.1% if Si killed, Si>0.03% and Al>0.01% if Si-Al killed.
MAE (Nb, V, Ti, B) <0.20% either singly or in combination.
If only B is added it should be <0.006%.
For copper bearing quality permissible Cu% 0.17 to 0.38. Nitrogen content <0.007% and for
grades CRO & CR 1 <0.012%.

Mechanical Properties
Designation Grade SAIL Name YS, UTS, % EI min Hardness
MPa min MPa min LO=80 LO=50 HR B HR 30T
mm mm
CRO H
CR1 O
340 HSCR 26 260 340 26 29
390 HSCR 30 300 390 23 26
440 HSCR 35 350 440 20 23
CR2 D 240 370 30 31 65 60

CR3 DD 220 350 34 35 57 55
CR4 EDD 210 350 36 37 50 50

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