C45 (1.0503) is a kind of high strength carbon quality steel and it
is usually used under the condition normalization because the poor
hardenability. At high mechanical performance requirements, C45 is
using tempering treatment. C45 steel’s properties of cold
deformation and plastic is medium and machinability under the
condition annealing and normalizing is better than tempering.
1. EN10083-2 C45 steel chemical composition %:
C:0.42-0.50, Si(max):0.40, Mn:0.50-0.80, S(max):0.045,
P(max):0.045, Cr(max):0.40, Ni(max):0.40, Mo(max):0.10
2. EN10083-2 C45 steel mechanical properties:
Tensile strength σb (MPa)(min):600(61)
Yield strength σs (MPa)(min):355(36)
elongation δ5 (%)(min):16
percentage reduction of area ψ (%)(min):40
impact energy Akv (J)(min): 39
notched bar impact strength αkv (J/cm2)(min):49(5)
hardness: unheated(max):229HB; annealed steel(max):197HB
3. EN10083-2 C45 steel heat treatment specification and
heat treatment: normalizing, 850℃; quenching, ,840℃; tempering,
4. EN10083-2 C45 steel delivery state:
With no heat treatment or heat treatment (annealing, normalizing
and high temperature tempering) status of delivery. Heat treatment
state delivery should be indicated in the contract, not specified,
the delivery state is no heat treatment.
5.Trading term: FOB, CIF, CFR
6.Payment : Usually 30% of the amount by T/T as deposit , and the
balance money shall be paid by T/T after got the faxed B/L.Or L/C
at sight .
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