S550MC
1.0986High yield strength thermomechanically rolled steel for cold forming with minimum yield strength 550 MPa. The highest alloy quality grade in EN 10149-2 (grades above 550 are alloy special steels). Fine-grained microstructure provides excellent cold bending, folding, and flanging properties. Used for automotive chassis components, crane booms, trailer frames, agricultural machinery, and structural cold-formed sections.
Mechanical properties
Related materials
C45E
1.1191Unalloyed special steel with controlled chemistry (E grade) and 0.42–0.50% carbon. Tighter P and S limits than standard C45 for improved consistency. The most widely used medium-carbon steel for quenching and tempering. Good balance of strength (620–850 MPa QT) and toughness. Through-hardening up to ø60mm. Surface hardening by induction to HRC 58. Used for shafts, gears, bolts, connecting rods, crankshafts, and general machine parts.
C25E
1.1158Unalloyed special steel with controlled chemistry (E grade) and ~0.25% carbon. Tighter P and S limits (max 0.025%) than standard C25 for improved consistency. Suitable for quenching and tempering to moderate strength levels. Good machinability and weldability. Used for shafts, bolts, transmission parts, crankshafts, and machine components of moderate stress.
C30
1.0528Medium-carbon unalloyed steel with approximately 0.30% carbon. Intermediate strength between C25 and C35. Good machinability and moderate weldability (preheating recommended for thicker sections). Used for moderately stressed structural parts, shafts, bolts, levers, and connecting rods in general mechanical engineering.
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