Designation by Standards
| Brand Name |
Ravne No. |
Mat. No. |
DIN |
EN |
AISI |
| OW4 |
242 |
1.2510 |
100MnCrW4 |
95MnWCr5 |
O1 |
Chemical Composition (in weight %)
| C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
W |
Others |
| 0.95 |
0.25 |
1.20 |
0.48 |
- |
- |
0.13 |
0.55 |
- |
Description
This alloy is one of the cold work, oil hardening type tool steels. It is relatively inexpensive containing small amounts of manganese, tungsten and chromium. Hardening by oil quench minimizes distortion and cracking.
Applications
Applications include short run tooling for blanking dies, cold forming dies and cutting tools operating at ambient temperature. For working tools, cutting blades, sizing and stamping tools.
Physical properties (avarage values) at ambient temperature
Density [g/cm
3]: 7.85
Thermal conductivity [W/m.K]: 30.0
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC |
20-200oC |
20-300oC |
20-400oC |
20-500oC |
20-600oC |
20-700oC |
| 12.1 |
12.9 |
13.3 |
14.0 |
14.4 |
14.8 |
14.9 |
Continuous Cooling Transformation (CCT) Diagram
Click the image to enlarge the diagram.
Soft Annealing
Heat to 740-770
oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 230.
Hardening
Harden from a temperature of 780-820
oC followed by oil, warm bath (180-220
oC) quenching. Hardness after quenching is 64 HRC.
Tempering
Tempering temperature: See the data bellow.
Tempering Temperature (oC) vs. Hardness (HRC)
| 100oC |
200oC |
300oC |
400oC |
500oC |
600oC |
650oC |
| 64 |
61 |
56 |
51 |
44 |
37 |
34 |
Tempering Diagram
Click the image to enlarge the diagram.
Forging
Hot forming temperature: 1037-875
oC.
Machinability
Machinability of this alloy is very good. It has a rating of 90% that of the W group water hardening low alloy tool steels.
Corrosion Resistance
This is a relatively simple steel alloy and does not resist ordinary corrosion. It will rust unless protected.
Welding
This alloy is weldable by standard means. Consult the alloy supplier for details and procedures.
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.
