Specified Chemical Composition
C
Mn
P
S
Si
Cr
Ni
N
Mo
ASTM
0.03
1.50
0.040
0.030
1.00
10.50-
12.501.50
0.030
A240
UNS
S41003
Duracorr®
0.025
1.50
0.040
0.008
0.70
11.0-
12.501.00
0.030
0.20-
0.30
(Maximum wt %, except as noted)
Duracorr® Chemical Composition
Duracorr®, a registered trademark of Mittal Steel, is produced to the chemical composition shown below, and is melted and refined by the Vacuum Oxygen Decarburization (VOD) process. It exhibits a fine-grain, dual phase microstructure of ferrite plus tempered martensite as exhibited here:
Microstructure

Dual Phase microstructure of Duracorr®, a registered trademark of Mittal Steel, nital-picral etch (100x).