Designation by Standards
| Brand Name |
Ravne No. |
Mat. No. |
DIN |
EN |
AISI |
| BRW |
870 |
1.3355 |
S18-0-1 |
HS18-0-1 |
T1 |
Chemical Composition (in weight %)
| C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
W |
Others |
| 0.78 |
max. 0.45 |
max. 0.45 |
4.15 |
- |
- |
1.10 |
17.95 |
- |
Description
T1 is tungsten type tool steel. Very high resistance to wear and to softening. Good toughness and cutting capability. Deep hardening response.
Applications
Turning, planing and slotting tools, tapes, twist drills, threading dies, profile cutting tools, broaching tools, reamers.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [10
3 x N/mm
2]: 217
Density [g/cm
3]: 8.70
Thermal conductivity [W/m.K]: 19.0
Electric resistivity [Ohm mm
2/m]: 0.50
Specific heat capacity[J/g.K]: 0.46
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC |
20-200oC |
20-300oC |
20-400oC |
20-500oC |
20-600oC |
20-700oC |
20-800oC |
| 9.8 |
11.1 |
11.4 |
11.7 |
11.8 |
12.0 |
12.3 |
12.3 |
Soft Annealing
Heat to 820-880
oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 230-300.
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
Heat up to 450-600
oC, then preheat to 850
oC, and to 1050
oC. Harden from a temperature of 1250-1290
oC followed by oil, air quenching or warm bath
550
oC. Hardness after quenching is 64-66 HRC.
Transformation temperatures: Ac
1=824
oC , Ac
3=858
oC.
Tempering
Tempering temperature: 3 x 1 hour at 550-570
oC
Tempering Temperature (oC) vs. Hardness (HRC)
| 200oC |
300oC |
400oC |
500oC |
525oC |
550oC |
575oC |
600oC |
650oC |
700oC |
| 64 |
62 |
62 |
64 |
65 |
65.5 |
64.5 |
63 |
56 |
47 |
Tempering Diagram
Click the image to enlarge the diagram.
Forging
Hot forming temperature: 1050-900
oC.
Machinability
No data.
Corrosion Resistance
Corrosion resistance of this alloy is better than that of plain carbon steels. However it will rust unless given protective treatment.
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.
