1.2344 X40CrMoV5-1 |
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1.2344 X40CrMoV5-1 is an air hardening hot work tool steel which combines a
very good red-hardness with toughness and co
vers a wide variety of applications.1.2344 X40CrMoV5 hot work tool steel can be water cooled in service and offers high temperature strength and wear resistance. |
TYPICAL ANALYSIS |
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C. |
Si. |
Mn. |
Cr. |
Mo. |
V. |
0.38% |
1.00% |
0.40 |
5.00% |
1.30% |
1.00% |
Welding:
Due to the high risk of crack formation welding of 1.2344 tool steel should be avoided, if possible. When, howe ver welding is essential, the following serves as a guide:
A . Welding of soft annealed 1.2344 X40CrMoV5 tool steel
· Preheat to 300 - 500°C
· Weld at 300-500°C
· Immediately stress relieve at 675-750°C. Soaking time at temperature, 3 hours.
Electrode: Cr-Mo alloy electrode for welding low alloyed steel.
B. Welding in connection with hardening of soft annealed 1.2344 X40CrMoV5 tool steel.
· Heat to austenitizing temperature.
· Cool to approx. 500°C
· Weld at approx. 500°C
· Cool to approx. 100°C in the same way as at normal hardening, then temper to desired hardness.
Electrode: Hard facing electrode.
C. Repair welding of 1.2344 X40CrMoV5 tool steel in hardened and tempered condition.
· Preheat to the tempering temperature (min. 300°C) previously used.
· Weld at tempering temperature. Do not weld below 150°C.
· Reheat immediately to 300°C. Soaking time 3 hours.
· Cool in air to approx. 80°C.
· Reheat immediately to 300°C. Soaking time 3 hours.
Electrode: Hard facing electrode.
| Physical Properties: 1.2344 X40CrMoV5 |
Temperature: |
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| | 200°C |
400°C |
600°C |
| Density (Kg/dm³) |
7.75 |
7.70 |
7.65 |
| Coefficient of thermal expansion (per °C from 0°C) |
11.9 x 10-6 |
12.4 x 10-6 |
12.8 x 10-6 |
| Thermal conductivity (cal/cm.s °C) |
60.0 x 10-3 |
62.4 x 10-3 |
63.6 x 10-3 |
| Modulus of elasticity: |
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| N/mm² |
184 000 |
175 000 |
154 000 |
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