EN 10263-4 41Cr4 Alloy Steel Round Bar

Chemical composition

Element

Weight %

Mn

0.60-0.90

C

0.38-0.45

S

≤0.025

P

≤0.025

Si

≤0.30

Cr

0.90-1.20

Cu

≤0.25

Application:

Heat treatable steel for driving elements as crankshafts;

front vehicle axles;

axle journals;

steering components.

 

 

Hot forming and heat treatment:

Forging or hot rolling: 1100 - 850°C

Normalising: 850 - 880°C/air

Soft annealing: 680 - 720°C/furnace

Hardening: 820 - 860°C/oil, water

Tempering: 540 - 680°C

 

 

Mechanical Properties:

Treated for cold shearability +S: max. 255 HB

Soft annealed +A: max. 241 HB

Quenched and tempered, +QT:

Diameter[mm]

< 16

>16 – 40

>40 – 100

>100– 160

>160– 250

Thickness[mm]

< 8

8<t<20

20<t<60

60<t<100

100<t<160

0,2% proof stress

[N/mm2]

min. 800

min. 660

min. 560

-

-

Tensile strength [N/mm2]

1000 - 1200

900 - 1100

800 - 950

-

-

Fracture elongation  [%]

min. 11

min. 12

min. 14

-

-

Reduction of area [%]

min. 30

min. 35

min. 40

-

-

 

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