1.2329, 46CrSiMoV7, Hot Work Tool Steel
General
1.2329 is a chromium-nickel-molybdenum-vanadium alloyed hot work tool steel which is characterized by:
- Good toughness
- Good resistance to high thermal stresses
- Good stability in hardening
- Good through-hardening properties
| Typical analysis % | C 0.45 | Si 0.7 | Mn 0.8 | Cr 1.8 | Ni 0.5 | Mo 0.3 | V 0.2 |
| Standard specification | W.-Nr. 1.2329, DIN 46 CrSiMoV7 | ||||||
| Delivery condition | Soft annealed to max. 250 HB. | ||||||
| Colour code | Red/black | ||||||
Cutting:
Precision cutting to standard dimensions
Custom cutting according to client specifications
Surface Grinding/Polishing:
Thickness tolerance: -0 to +0.1mm
Flatness: 0.01/100mm
Surface roughness: Ra ≤1.6 or Rz ≤6.3
Applications
1.2329 is ideally suited for support parts for extrusion tooling, e.g. wedge blocks and bolsters.
Properties
Hardened and tempered to hardness 40 HRC. Data at room and elevated temperatures.
| Temperature | 20°C (68°F) | 200°C (390°F) | 400°C (750°F) |
| Density kg/m3 lbs/in3 | 7 780 0.281 | 7 730 0.279 | 7 670 0.277 |
| Coefficient of thermal expansion per °C from 20°C per °F from 68°F |
– – | 12.9 x 10–6 7.1 x 10–6 | 13.6 x 10–6 7.5 x 10–6 |
| Modulus of elasticity N/mm2 psi | 205 000 29.7 x 106 | 195 000 28.3 x 106 | 180 000 26.1 x 106 |
| Thermal conductivity* W/m°C Btu in(ft2h°F) | 30 211 | 31 218 | 30 211 |
Heat treatment
Soft annealing
Protect the steel and heat through to 780°C (1435°F). Then cool in the furnace at 15°C
(25°F) per hour to 650°C (1200°F),then freely in air.
Stress relieving
After rough machining the tool should be
heated through to 650°C (1200°F), holding time 2 hours. Cool slowly to 500°C (930°F), then freely in air.
Hardening
Pre-heating temperature: 600–700°C (1110– 1290°F).
Austenitizing temperature: 880–920°C (1615– 1690°F) normally 900°C (1650°F).
Soaking time 30 minutes. Soaking time = time at hardening temperature after the tool is fully heated through.
Protect the part against decarburization and oxidation during hardening.
Quenching media
- Air blast/vacuum
- Martempering bath. Temperature 200–250°C (390–480°F) for max. 15 minutes, then
cooling in air
- Warm oil
Note:Temper the tool as soon as its tempera- ture reaches 50–70°C (120–160°F).
