Designation by Standards
| Brand Name |
Ravne No. |
Mat. No. |
DIN |
EN |
AISI |
| VCMO140 |
724 |
1.7225 |
42CrMo4 |
42CrMo4 |
4142 |
Chemical Composition (in weight %)
| C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
W |
Others |
| 0.41 |
0.20 |
0.75 |
1.05 |
0.23 |
- |
- |
- |
- |
Description
This is one of the chromium, molybdenum, manganese low alloy steels noted for toughness, good torsional strength and good fatigue strength.
Applications
Statically and dynamically stressed components for vehicles, engines and machines. For parts of larger cross-sections, crankshafts, gears.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [10
3 x N/mm
2]: 190-210
Density [g/cm
3]: 7.84
Continuous Cooling Transformation (CCT) Diagram
Click the image to enlarge the diagram.
Soft Annealing
Heat to 680-720
oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 241.
Hardening
Harden from a temperature of 820-850, 830-860
oC followed by water or oil quenching.
Normalizing
Normalizing: 840-880
oC
Tempering
Tempering temperature: 540-680
oC
Mechanical Properties in Quenched and Tempered Condition
| Diameter (mm) |
0.2 % proof stress (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
Reduction of area (%) |
Notch impact energy (ISO-V) (J) |
| up to 16 |
900 |
1100-1300 |
10 |
40 |
35 |
| 17-40 |
750 |
1000-1200 |
11 |
45 |
40 |
| 41-100 |
650 |
900-1100 |
12 |
50 |
40 |
| 101-160 |
550 |
800-950 |
13 |
50 |
40 |
| 161-250 |
500 |
750-900 |
14 |
55 |
40 |
Diagram Tempering Temperature - Mechanical Properties
Click the image to enlarge the diagram.
Hardenability in the end-quench test (Hardness (HRC) vs. Distance (mm))
| Hardness |
1.5 |
3 |
5 |
7 |
9 |
11 |
13 |
15 |
20 |
25 |
30 |
35 |
40 |
| H max. |
61 |
61 |
61 |
60 |
60 |
59 |
59 |
58 |
56 |
53 |
51 |
48 |
47 |
| H min. |
53 |
53 |
52 |
51 |
49 |
43 |
40 |
37 |
34 |
32 |
31 |
30 |
30 |
| HH max. |
61 |
61 |
61 |
60 |
60 |
59 |
59 |
58 |
56 |
53 |
51 |
48 |
47 |
| HH min. |
56 |
56 |
55 |
54 |
52 |
48 |
46 |
44 |
41 |
39 |
38 |
36 |
36 |
| HL max. |
58 |
58 |
58 |
57 |
56 |
54 |
53 |
51 |
49 |
46 |
44 |
42 |
41 |
| HL min. |
53 |
53 |
52 |
51 |
49 |
43 |
40 |
37 |
34 |
32 |
31 |
30 |
30 |
Forging
Hot forming temperature: 1050-850
oC.
Machinability
Machinability of this alloy is good in the annealed condition. In the heat treated and quenched condition machining is best limited to finish grinding.
Corrosion Resistance
This alloy is a steel and is not corrosion resistant. Protective coating must be used in corrosive, or water, environments.
Forms manufactured: Please see the
Dimensional Sales Program.
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.
Unless otherwise specified, registered trademarks are property of Metal Ravne company. Copyright 2011 by Metal Ravne. All rights reserved.
Contact our
Sales Office for more information.
