chemical composition:
Carbon 0.350 0.350
Manganese 0.700 1.100
Phosphorus 0.050 0.050
Sulfur 0.0500 0.0500
mechanical properties:
Tensile Strength : min. 480.0 MPa
Yield Strength : min. 275 MPa
Elongation : min. 20 %
similar materials:
1.0432 DIN 2528 Germany
C21 DIN 2528 Germany
35 BS 3602 Great Britain
60 ASTM A181 USA
70 ASTM A181 USA
WP12 CL2 ASTM A234 USA
thats abou all what the "atlas of world steels" has to say about it...
hth,
chris