Designation by Standards
| Brand Name |
Ravne No. |
Mat. No. |
DIN |
EN |
AISI |
| PT929 |
929 |
1.4922 |
X20CrMoV11-1 |
- |
- |
Chemical Composition (in weight %)
| C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
W |
Others |
| 0.20 |
max. 0.50 |
max. 1.00 |
11.25 |
1.00 |
0.55 |
0.30 |
- |
- |
Description
Steel PT929 is creep-resistant material that is generally used for temperatures up to 650
oC.
Applications
Component parts for steam turbines and other components, resistive to compressed hydrogen for chemical industry.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [10
3 x N/mm
2]: 210
Density [g/cm
3]: 7.76
Thermal conductivity [W/m.K]: 29.2
Electric resistivity [Ohm mm
2/m]: 0.65
Specific heat capacity[J/g.K]: 0.46
Modulus of Elasticity [103 N/mm2]
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 |
| 10.7 |
11.1 |
11.5 |
11.5 |
11.8 |
12.2 |
12.3 |
12.5 |
Soft Annealing
Heat to 730-780
oC, cool slowly in furnace or air.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to
650-680
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 1020-1070
oC followed by air or oil quenching. Structure is martensite.
Tempering
Tempering temperature: 720-780
oC.
Mechanical Properties at Room Temperature
| Size range mm |
Heat treatment condition |
0.2 % proof stress (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
Notch impact energy (ISO-V) (J) |
| d<=100 |
+Q+T |
500 |
700-850 |
16 (Long) 14 (Trans) |
29 (Long) 27 (Trans) |
| d<=250 |
+Q+T |
500 |
700-850 |
16 (Long) 14 (Trans) |
31 (Long) 27 (Trans) |
| 251-330 |
+Q+T |
500 |
700-850 |
16 (Long) 14 (Trans) |
27 (Long) 27 (Trans) |
0.2 % Proof Stress (N/mm2) at Elevated Temperatures
| Diameter (mm) |
100oC |
150oC |
200oC |
250oC |
300oC |
350oC |
400oC |
450oC |
500oC |
550oC |
600oC |
| Up to 160 |
460 |
445 |
430 |
415 |
390 |
380 |
360 |
330 |
290 |
250 |
160 |
1 % Creep Limit (N/mm2) vs. Temperature (oC)
| Hours |
480oC |
500oC |
520oC |
540oC |
560oC |
| 10 000 |
299 |
247 |
207 |
170 |
135 |
| 100 000 |
236 |
190 |
147 |
114 |
85 |
Creep Rapture Strength (N/mm2) vs. Temperature (oC)
| Hours |
480oC |
500oC |
520oC |
540oC |
560oC |
| 10 000 |
345 |
294 |
253 |
213 |
173 |
| 100 000 |
284 |
235 |
186 |
147 |
112 |
| 200 000 |
262 |
215 |
167 |
128 |
96 |
Diagram Tempering Temperature - Mechanical Properties
Click the image to enlarge the diagram.
Forging
Hot forming temperature: 1100-850
oC, slow cooling.
Machinability
Metal-cutting machining is the same as for special engineering steel grades of corresponding strength.
Welding
Steel PT929 is weldable. Preheating and slow cooling after welding are recommended.
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.
