1.7225

Material No.

1.7225

US standard (AISI)

4137, 4140

Abbreviation

42CrMo4

Old designation

Description

Carbon steel

Composition
Alloy constituents [%]

C: 0.38 – 0.45
Si: ≤ 0.40
Mn: 0.60 – 0.90
P: ≤ 0.025
S: ≤ 0.035
Cr: 0.90 – 1.20
Mo: 0.15 – 0.30

Density [g/cm³]

7.9

Yield point
Rp0.2 / Re[N/mm²]

>= 650 

Tensile strength
Rm [N/mm²]

900 – 1100

Elongation after fracture
A [%]

>= 12

Machinability

Good

Weldability

Unsuitable

Heat treatment

Possible

Other properties

Main uses

Levelling sets, studs, spherical levelling washer, connecting rods, crankshafts,
gear shafts, pinions, gear wheels