EN 10277-2: 2008 Bright steel products. Technical delivery conditions. Steels for general engineering purposes
EN 10083-2: 2006 Steels for quenching and tempering. Technical delivery conditions for non alloy steels
EN 10250-2: 2000 Open steel die forgings for general engineering purposes. Non-alloy quality and special steels
C55 is a medium carbon steel suitable for various type of applications where high strength is needed.It is used for components of small cross section requiring low tensile strength, and heavy forgings in the normalized condition for automotive and general engineering such as axles, clutch members, shafts, pressed and punched parts, piston rods and gear racks.
Tensile Strength:min 500 N/mm2 Yield Strength:min. 350 N/mm2
Elongation:min.11 %(l) Kv-Imapct value:min.55J (l)
- +A Soft annealed/Soft annealing
- +N Normalized/Normalizing
- +QT Quenched and Tempered
- +U Untreated
- +SR Stress Relieved
Normalizing:825℃-885℃,Cooling in air
Soft Annealing:650℃-700℃,Cooling in furnace
Hardening:870 – 990°C,water or oil quench
Tempering:550°C – 660°C,Cooling in air
Drawn and hot-rolled bars, flat bars C55, 1.0535
Forgings and forged bars in grade C55, 1.0535