1.0503 (C45)

Classification

Country Section Category
Germany Non-alloy Steels Steels with Average 0,25% =< C < 0,55% or 500 MPa =< Rm < 700 MPa

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % P, % C, % S, % Mo, %
97.31–99.07 < 0.4 0.5–0.8 < 0.4 < 0.4 < 0.045 0.43–0.5 < 0.045 < 0.1

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{0.2}$$, $$MPa$$ $$\epsilon_L$$, % $$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$$, % $$R_{eH}$$, $$MPa$$ Treatment
< 16 normalization 620 14
16–100 normalization 580 16
100–250 normalization 560 16 275
250–500 normalization 540 240
500–1000 normalization 530 230
5–10 solid, cold drawn 750–1050 565 5
10–16 solid, cold drawn 710–1030 500 6
16–40 solid, cold drawn 650–1000 410 7
40–63 solid, cold drawn 630–900 360 8
63–100 solid, cold drawn 580–850 310 8
< 100 normalization 305

Brinell hardness number

Rolling Standard Classifiers Value, HBW
improved machinability 255
annealing, soft 207
rolling, turning 172–242

Technological Properties

Weldability
Boundedly welded

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur
Mo % Molybdenum

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma_{0.2}$$ $$MPa$$ Tensile stress required to produce a total elongation of 0.2%
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\epsilon_L$$ % Elongation at break (longitudinal)
$$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$$ % Elongation at break (longitudinal) (for L0 = 5.65√So)
$$R_{eH}$$ $$MPa$$ Upper yield point

Designation of types of weldability

Parameter Units of measurement Description
no limits Welding is performed without heating and without subsequent heat treatment
Boundedly welded Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures