dillidur 450 v

DILLIDUR 450 V
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Tel: 0090 (332) 237 0 237
Fax: 0090 (332) 238 98 98
Nalçacı Cad. Nişantaş Sok. No: 13/10 KONYA / TÜRKİYE
ÇELPAŞ METAL
DILLIDUR 450 V
WATER QUENCHED WEAR RESISTANT STEEL
Material No. 1.8720
*)
Material Data Sheet Edition March 2001
DILLIDUR 450 V is a wear resistant steel with an average hardness of 450 HBW in delivery condition whose mechanical
properties are obtained by quenching.
DILLIDUR 450 V is successfully applied 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.
Product description
Range of application
The production range of the DILLIDUR 450 V plates is 8 mm (1/3 in.) to 100 mm (4 in.), please see delivery program. It
may be possible to supply other sizes on request.
Chemical composition
Heat analysis, in %:
C
£ 0.25
Si
£ 0.50
Mn
£ 1.60
P
£ 0.025
S
£ 0.010
Depending on thickness, the following alloying elements are used singly or in combination for controlling of full
hardening:
Mo
£ 0.50
Ni
£ 0.80
Cr
£ 1.50
V
£ 0.08
Nb
£ 0.05
B
£ 0.005
The steel is fully killed and fine-grain treated.
Typical values for the carbon equivalent:
Plate thickness [mm]
1)
CEV
CET 2)
1)
2)
£ 25
> 25£ 45
> 45£ 70
> 70£ 100
0.43
0.33
0.56
0.37
0.62
0.39
0.67
0.40
CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40
Delivery condition
Controlled water quenched.
*)
The current version of this data sheet is available under www.dillinger.de
DILLIDUR 450 V
Mechanical properties in the delivery condition
Hardness
Hardness at room temperature: 420 - 480 HBW
Tensile testing on transverse specimens at room temperature (typical values for 20 mm (0.8 in.) plate thickness)
Tensile strength
Yield point
Elongation
1500 N/mm² (220 ksi)
1200 N/mm² (175 ksi)
11 % (lo = 5.65ÖSo)
Charpy-V impact test on longitudinal specimens (typical values for 20 mm (0.8 in.) plate thickness)
Toughness
30 J (22 ft.lbf) at -20 °C (-4 °F)
Bending test on transverse specimens (typical values for plate thicknesses up to 30 mm (1.2 in.))
Formability
Radius of mandrel‡ 3.0 x specimen thickness, bending angle 180°
Testing
Brinell surface hardness tested once per heat and 40 t.
Identification
The marking bears at least:
• the manufacturer´s brand.
• the steel designation (DILLIDUR 450 V)
• the heat number
• the rolled plate number
Additionnally the plates are provided with the inscription DILLIDUR 450 V.
Workability
The entire fabrication and application techniques are of fundamental importance to the reliability of products
manufactured with these steels. The fabricator should ensure that the methods of calculation, design and manufacture
comply with the properties of the material, the state of the technical development and the intended application. The
customer is responsible for the selection of the material. The manufacturing recommendations of the Stahl-EisenWerkstoffblatt 088 or of the EN 1011 standard should be applied analogously while considering the higher strength and
hardenability.
Cold forming
In spite of its high degree of hardness the steel can be cold formed. It should be payed attention to the fact that with
increasing yield strength the required forces for the forming operation also grow even if the plate thickness remains
unchanged. The backspring increases too. Grinding of the flame cut or sheared edges in the bending area is
recommended to avoid cut crack initiation.
The cold forming operations should be carried out under consideration of the following recommandations (where t is the
plate thickness):
Minimum bending radius
Minimum die opening
t £ 25 mm
t > 25 mm
t £ 25 mm
t > 25 mm
Transverse direction
5t
6t
10 t
12 t
Longitudinal direction
6t
7t
12 t
14 t
Hot forming
The steel obtains its hardness by accelerated cooling from the austenitizing temperature. After hot forming the same
hardness is only obtained if the steel is quenched again after forming. It has to be expected, that the hardness achieved
through such a treatment differs from that measured in the delivery condition because the cooling capacity available
during production of the plate differs from that available in the fabricator's works.
The steel can be heated to about 200°C (390°F) without any substantial drop in hardness (250 °C for short period).
DILLIDUR 450 V
Flame cutting and welding
For flame cutting, the following minimum preheating temperatures should be observed: 75 °C (170 °F) for plate
thicknesses from 25 up to 70 mm and 125°C (260 °F) for thicker plates.
For manual arc welding basic coated rods, having a very low residual moisture should be used (if necessary, drying
according to the instruction of the manufacturer should be carried out).
Additionally the following recommendations are to be considered:
•
•
Generally up to a thickness of 15 mm (0.6 in.) the steel can be butt welded without preheating. In order to eliminate
the risk of cracking in the welded joint, in cases of high rigidity of structure a preheating temperature of 140
°C - 190
(285 - 375 °F) is generally recommended for thicknesses
> 15 mm (0.6 in.). A preheating over 200
°C (390°F) must be
avoided, because it would bring a decrease of the hardness (see diagram).
Weld fillers should be as soft as loading conditions of the construction and wear and tear of the weld allow it.
Heat treatment
The following diagram shows the general change in hardness or strength values in accordance with the heat treatment
temperature:
1600
Hardness [HBW] resp. Rm / Rp
0,2 [N/mm²]
Typical values for 20 mm plate thickness
Tensile strength
1400
1200
Yield strength
1000
800
600
Hardness
400
200
0
0
100
200
300
400
500
600
Tempering temperature [°C]
Allowance should be made of the fact that the toughness of the steel at room temperature can be decreased by a heat
treatment at 300 – 400 °C (570 – 750 °F).
Machining
DILLIDUR 450 V can be machined with HSS-drills and especially with HSS-Co-alloyed drills with a satisfactory service
life if the drill advance and cutting speed are correspondingly accomodated.
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 are applicable.
General note
If for application or manufacturing reasons, particular requirements are demanded of the steel which are not covered in
this data sheet, please contact us for special agreement prior to ordering.
For more information about application and machining of DILLIDUR 450 V, please refer to our technical publication
"DILLIDUR - The concept against wear".
DILLIDUR 450 V
www.celpas.com - info@celpas.com
Tel: 0090 (332) 237 0 237
Fax: 0090 (332) 238 98 98
Nalçacı Cad. Nişantaş Sok. No: 13/10 KONYA / TÜRKİYE
ÇELPAŞ METAL