42CrMo4QT / 1.7225QT
The steel 42CrMo4QT / 1.7225 is an all-purpose material, especially for use in mechanical engineering. Its high strength combined with high toughness makes it possible to use it in heavy-duty machine parts, e.g. axles, transmission shafts, gear wheels, etc.
| Grade : |
42CrMo4 |
| Number: |
1.7225 |
| Classification: |
Alloy special steel |
| Standard: |
| EN 10083-3: 2006 Steels for quenching and tempering. Technical delivery conditions for alloy steels |
| EN 10132-3: 2000 Cold rolled narrow steel strip for heat treatment. Technical delivery conditions. Steels for quenching and tempering |
| EN 10305-1: 2010 Steel tubes for precision applications. Seamless cold drawn tubes. Technical delivery conditions |
| EN 10269: 1999 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties |
| EN 10263-4: 2001 Steel rod, bars and wire for cold heading and cold extrusion. Technical delivery conditions for steels for quenching and tempering |
| EN 10250-3: 2000 Open steel die forgings for general engineering purposes. Alloy special steels |
| EN 10297-1: 2003 Seamless circular steel tubes for mechanical and general engineering purposes. Non-alloy and alloy steel tubes. Technical delivery conditions |
|
| Equivalent grades: |
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Chemical composition % of steel 42CrMo4 (1.7225): EN 10083-3-2006
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
| 0.38 - 0.45 |
max 0.4 |
0.6 - 0.9 |
max 0.025 |
max 0.035 |
0.9 - 1.2 |
0.15 - 0.3 |
Mechanical properties of steel 42CrMo4 (1.7225)
| Nominal diameter (mm): |
to 16 |
16 - 40 |
40 - 100 |
100 - 160 |
160 - 250 |
250 - 330 |
330 - 660 |
|
| Rm - Tensile strength (MPa) (+QT) |
1100-1300 |
1000-1200 |
900-1100 |
800-950 |
750-900 |
700 |
600 |
| Nominal thickness (mm): |
0.3 - 3 |
|
| Rm - Tensile strength (MPa) (+A) |
620 |
|
| Rm - Tensile strength (MPa) (+AC) |
630 |
| Nominal thickness (mm): |
to 8 |
8 - 20 |
20 - 50 |
50 - 80 |
|
| Rm - Tensile strength (MPa) (+QT) |
1100 |
1000 |
900 |
800 |
|
| Rm - Tensile strength (MPa) (+C) |
720 |
|
| Rm - Tensile strength (MPa) (+LC) |
670 |
| Nominal diameter(mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; |
to 16 |
16 - 40 |
40 - 100 |
100 - 160 |
160 - 330 |
330 - 660 |
|
Re - Upper yield strength or
Rp0.2 - 0.2% proof strength (MPa) (+QT) |
900 |
750 |
650 |
500-550 |
460-500 |
390 |
| Nominal thickness(mm): |
0.3 - 3 |
|
| Rp0.2 0.2% proof strength (MPa) (+A) |
480 |
|
| KV - Impact energy (J) longitud., (+QT) |
+20°
30-35 |
|
| KV - Impact energy (J) transverse, (+QT) |
+20°
22 |
| Nominal thickness (mm): |
0.3 - 3 |
|
| A - Min. elongation Lo = 80 mm (%) (+A) |
15 |
|
| A - Min. elongation at fracture (%) transverse, (+QT) |
10-14 |
|
| A - Min. elongation at fracture (%) (+C) |
4 |
|
| A - Min. elongation at fracture (%) (+LC) |
6 |
| Nominal thickness (mm): |
to 16 |
16 - 40 |
40 - 100 |
100 - 160 |
160 - 250 |
|
| A - Min. elongation Lo = 5,65 √ So (%) (+QT), round products |
10 |
11 |
12 |
13 |
14 |
| Nominal diameter (mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; |
to 16 |
16 - 40 |
40 - 100 |
100 - 160 |
160 - 250 |
|
| Z - Reduction in cross section on fracture (%) (+QT) |
40 |
45 |
50 |
50 |
55 |
|
| Z - Reduction in cross section on fracture (%) (+AC) |
57 |
| Brinell hardness (HBW): (+S) |
255 |
| Brinell hardness (HBW): (+A) |
241 |
| Vickers hardness ( HV): (+A) |
195 |
| Vickers hardness ( HV): (+QT) |
340 - 490 |
Properties of steel 42CrMo4 (1.7225)
Weldability: Bad weldability due to the high crack danger.
Hardenability: Medium-good hardenability, suitable for hot purposes till a temperature of 500 C. It can be hardened in oil. |
Equivalent grades of steel 42CrMo4 (1.7225)
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