Designation by Standards
| Brand Name |
Ravne No. |
Mat. No. |
DIN |
EN |
AISI |
| UTOPMO7 |
254 |
1.2367 |
X38CrMoV5-3 |
- |
- |
Chemical Composition (in weight %)
| C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
W |
Others |
| 0.38 |
0.40 |
0.40 |
5.00 |
2.95 |
- |
0.50 |
- |
- |
Description
Hot work tool steel. Secondary hardening steel with high strength and wear resistance in hot. Good tempering resistance. High hardenability and thoughness. Tools can be water cooled.
Applications
Wear resisting tools, pressure die casting tools, pressing tools for light and heavy metal. For the highest requirements we recommend UTOPMO7 ESR EFS.
Physical properties (avarage values) at ambient temperature
Density [g/cm
3]: 7.83
Thermal conductivity [W/m.K]: 25.0
Thermal conductivity [W/m.K]
| 20oC |
500oC |
600oC |
| 25.0 |
28.5 |
29.3 |
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC |
20-200oC |
20-300oC |
20-400oC |
20-500oC |
20-600oC |
20-700oC |
| 11.5 |
12.0 |
12.2 |
12.5 |
12.9 |
13.0 |
13.2 |
Continuous Cooling Transformation (CCT) Diagram
Click the image to enlarge the diagram.
Time-Temperature Transformation (TTT) Diagram
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Soft Annealing
Heat to 800-840
oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 235.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to
650
oC, holding for one hour at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 1030-1080
oC followed by air, oil or warm bath
(500-550
oC) quenching. Hardness after quenching is 53-57 HRC.
Tempering
Tempering temperature: See the table bellow.
Tempering Temperature (oC) vs. Hardness (HRC) vs. Tensile Stregth (N/mm2)
| 100oC |
200oC |
300oC |
400oC |
500oC |
550oC |
600oC |
650oC |
700oC |
| 57 |
55 |
54 |
53 |
55.5 |
56 |
53 |
43 |
31 |
| 2140 |
1980 |
1910 |
1845 |
2010 |
2050 |
1845 |
1360 |
995 |
Tempering Diagram
Click the image to enlarge the diagram.
Diagram Tempering Temperature - Mechanical Properties
Click the image to enlarge the diagram.
Diagram Tempering Temperature - Mechanical Properties
Click the image to enlarge the diagram.
Diagram Tempering Temperature - Mechanical Properties
Click the image to enlarge the diagram.
Forging
Hot forming temperature: 1080-900
oC.
Machinability
No data.
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.
