VAUTID W78A

For components over 40 mm thick that are subject to impact and abrasion

With a very high proportion of chrome carbides embedded in an extremely stable matrix, VAUTID W78A produces castings which achieve a long service life, even under extreme conditions. VAUTID W78A has proved ideal in situations where severe impact is combined with highly abrasive media.

Recommended applications:

Cast components that are exposed to temperatures up to 400°C.
Components that are subjected to very severe abrasion and significant impact g. hammers, impact heads, chisels, and beater bars.

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