Designation by Standards
| Brand Name |
Ravne No. |
Mat. No. |
DIN |
EN |
AISI |
| OH237 |
237 |
- |
- |
- |
S5 |
Chemical Composition (in weight %)
| C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
W |
Others |
| 0.57 |
2.00 |
0.80 |
0.30 |
0.78 |
- |
0.25 |
- |
- |
Description
Cold work tool steel. Shock resisting tool steel with good toughness at high strength levels.
Applications
Different cutting parts, chisels, rivet sets, punches, driver bits.
Physical properties (avarage values) at ambient temperature
Density [g/cm
3]: 7.74
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC |
20-200oC |
20-300oC |
20-400oC |
20-500oC |
20-600oC |
20-700oC |
| 13.1 |
13.7 |
14.4 |
14.4 |
14.7 |
14.9 |
15.0 |
Continuous Cooling Transformation (CCT) Diagram
Click the image to enlarge the diagram.
Time-Temperature Transformation (TTT) Diagram
Click the image to enlarge the diagram.
Soft Annealing
Heat to 770-800
oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 229.
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 880-920
oC followed by oil quenching. Hardness after quenching is 63 HRC.
Tempering
Tempering temperature: See the data bellow.
Tempering Temperature (oC) vs. Hardness (HRC)
| 100oC |
200oC |
300oC |
400oC |
500oC |
550oC |
| 62 |
60 |
58 |
56 |
50 |
48 |
Tempering Diagram
Click the image to enlarge the diagram.
Forging
Hot forming temperature: 1050-900
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.
