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DILLIDUR 450 V

DILLIDUR 450 V is a wear resistant steel with an average hardness of 450 HBW in delivery condition ex works. Its mechanical properties are obtained by quenching.

DILLIDUR 450 V is preferentially used by the customers where elevated resistance to wear is required together with good workability and especially good weldability.

Examples of application: earth moving and loading machines, dredgers, skip cars, conveying plants, trucks, cutting edges, knives and breakers, waste elimination and recycling plants.

Range of application

DILLIDUR 450 V can be delivered in thicknesses from 8 mm (1/3 in.) to 100 mm (4 in.), according to the dimensional program. Other dimensions may be possible on request.

Chemical composition

For the ladle analysis, the following limiting values in % are applicable:

C	Si	Mn	P	S
≤0.25	≤0.50	≤1.60	≤0.025	≤0.010

Depending on thickness, the following alloying elements are used singly or in combination for control of full hardening:

Mo	Ni	Cr	V	Nb	B
≤0.50	≤0.80	≤1.50	≤0.08	≤0.05	≤0.005

The steel is fully killed and fine-grain treated.

Indicative values for the carbon equivalent:

Plate thickness [mm]	10	40	80
CEV 1)	0.46	0.53	0.65
CET 2)	0.33	0.36	0.39

1) CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
2) CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40

Delivery condition

Controlled water quenched.

Hardness

Hardness at room temperature: 420 - 480 HBW

Tensile testing on transverse specimens at room temperature

Indicative values for 20 mm (0.8 in.) plate thickness.

Tensile strength: 1400 MPa (203 ksi)
Yield point: 950 MPa (138 ksi)
Elongation: 11 % (lo = 5.65√So)

In spite of their high tensile properties, DILLIDUR steels are not intended for safety relevant components. For this purpose high strength steels DILLIMAX are available.

Charpy-V impact test on longitudinal specimens

Indicative values for 20 mm (0.8 in.) plate thickness.

Toughness: 35 J at -20 °C (-4 °F)

Testing

Brinell surface hardness tested once per heat and 40 t.

Identification of plates

Unless otherwise agreed the marking is carried out via steel stamps with at least the following information:

• steel grade (DILLIDUR 450 V)
• heat number
• number of mother plate and individual plate
• the manufacturer’s symbol
• inspector’s sign

General technical delivery requirements

Unless otherwise agreed, the general technical requirements in accordance with EN 10021 are applicable.

Tolerances

Unless otherwise agreed, the tolerances are in accordance with EN 10029, with class A for thickness.

Surface quality

Unless otherwise agreed, the provisions in accordance with EN 10163-2, class A2 are applicable.