VAUTID W4
For thin-walled components (30Â mm max) that are subject to a combination of impact and abrasion
Due to their extreme hardness, components cast in VAUTID W4 offer outstanding resistance to abrasive wear. This specification has been adapted to give exceptional ductility, enabling it to handle moderate impact and shock loadings.
VAUTID W4 is a ânaturally hardâ material, i.e. its wear resistant properties are present as soon as the casting forms. Since no expensive heat treatment is required, products made in genuine VAUTIDÂ W4 offer a particularly economical solution.
Because of the materialâs high wear-resistance, components made from VAUTIDÂ W4 cannot be machined.
Recommended applications:
- Cast components that are exposed to temperatures up to 400°C.
- Thin-walled components (<Â 30Â mm) that are subject to abrasion and impact, e.g. liners in crushing plants, or deflector plates.
Mechanical properties
VAUTID use white cast iron materials produced to DIN EN 12513 grades GJN-HV520 – 5.5602 and GJN-HV600(XCr18) – 5.5609 for components exposed to abrasion or to a combination of abrasion and impact. Materials developed in-house by VAUTID are used in impact mills, crushers and conveyor units, commonly installed in recycling plants, asphalt works or power generation plants. Typical components include lining elements, mixer tools, pump parts, hammers and beater bars. VAUTID materials VAUTID W7, VAUTID W72 and VAUTID W72H can all be machined.
| VAUTID material | Tensile strengt [hN/mm²] | Crushing strenght [N/mm²] | Elastic modulus [kN/mm²] |
Hardness HB [HRC] |
Fracture toughness KIC [kN/mm²] |
| GJN-HV520 – 5.5602 (similar to Ni-Hard 1)1 |
– | – | – | approx. 52 | – |
| GJN-HV600(XCr18) – 5.5609 (similar to Ni-Hard 4)2 |
– | – | – | approx. 55 | – |
| VAUTID W31 | 450 – 800 | 620 – 750 | 165 – 180 | approx. 58 | – |
| VAUTID W41 | 450 – 800 | 620 – 750 | 165 – 180 | approx. 52 | – |
| VAUTID W73 | 600 – 1.000 | 2.800 – 3.200 | 158 – 190 | approx. 59 | 25 – 31 |
| VAUTID W723 | 600 – 1.000 | 2.800 – 3.200 | 158 – 190 | approx. 59 | 25 – 31 |
| VAUTID W72H3 | 600 – 1.000 | 2.800 – 3.200 | 158 – 190 | approx. 59 | 25 – 31 |
| VAUTID W733 | 600 – 1.000 | 2.800 – 3.200 | 158 – 190 | approx. 59 | 25 – 31 |
| VAUTID W78A3 | 600 – 1.000 | 2.800 – 3.200 | 158 – 190 | approx. 62 | – |
| VAUTID W1001 | 450 – 800 | 1.800 – 2.800 | 150 – 170 | approx. 59 | 25 – 31 |
Condition of delivery: 1 G; 2 G/hardened; 3 hardened
Wear resistance
In abrasive applications, VAUTID W4 extends service life up to a factor of 3 compared to S235JR
Alloy
Carbides
Chromium carbides Cr7C3 2200 HV1
Typical microstructure VAUTID W4
1 Carbide hardness is specified in the [HV] unit (Vickers hardness).
