A range of drop weight impact testers for measuring the fracture 
characteristics and fracture ductility of steel specimens according 
to the following standards: 
API recommended practice 5L3, EN 10274, ASTM-E 436 and ‘Pellini’

1 DWT40-42 Technical Information
1·1 System
Drop height : Range 1000mm to 4200mm
Resolution 1mm
Accuracy ± 2mm
Drop mass : Fixed 1000Kg (option)
Variable 500Kg to 1000Kg (option)
Accuracy ± 0.5%
Velocity range : 4.43m/s to 9.0m/s
Energy range : 9800J to 40500J
4900J to 40500J (option)
Striker : Radius of curvature 25.4mm ±0.1mm
Centreline with respect to centre of anvil supports:
0mm ± 1.0mm
Complies with API 5L3, ASTM 436, EN 10274
Material of contact parts – H13 (BS-3BH13)
Anvil : Radius of curvature 15.0mm ±0.1mm
Span 254.0mm ±1.0mm
Complies with API 5L3, ASTM 436, EN 10274
Material of contact parts – H13 (BS-3BH13)
Specimen size : Width 76.0mm ±3.0mm (NB specimens of differing
widths will require adjustment of the data
acquisition trigger position)
Length 305mm±50.0mm
Thickness 3mm to 30mm
Weight up to 7kg
Notch depth 5.1mm±0.51mm, angle 45°±2°,
radius 0mm to 0.05mm
Planarity ≤5mm
Can accommodate specimens prepared according to
standards API 5L3, ASTM 436, EN 10274
Overall dimensions : 1300mm width
1300mm depth 7500mm height
Weight : 6000kg approximately
Foundation (recommended) : Piling as required by underlying soil to suit static load of 6 metric tons, dynamic load of 100 metric tons Deep trench foundations filled with low-Q concrete.
Concrete topped by Imatek-supplied interface plate,
levelled to 0.5 mm over 1000mm
Base : 1300mm x 1300mm x 200mm solid cast steel
Hole in base underneath specimen area allows retrieval of
specimens by sliding drawer

Very robust construction stands up to the rigours of high energy testing to provide high reliability with a minimum of downtime.
Easily interchangeable contact parts simplify maintenance and reduce cost of ownership.
State-of-the-art testing accommodates impact energies up to 100,000J and specimens up to 50mm thick.
Very high levels of safety employing multiply redundant systems, compliant with 89/392/EEC and 91/368/EEC machinery safety directives.
Automated specimen loading provides compliance with cycle times required by test methods, while maintaining operator safety.
Very rigid base and anvils ensures very low flexure under high test loads.
Guided mass system to ensure that the impact geometry is correct throughout the entire test.
Highly accurate and repeatable drop parameters.
High quality, easy to use control software ensures consistency and enhances throughput.
Ergonomically designed, no requirement for the operator to work at elevated heights or handle excessive physical loads.
Optional instrumentation package to measure impact force up to 1500kN. Provides values for peak force and energy to fail, together with a high resolution force-deflection curve to analyse failure mode.
Optional variable mass system to provide precise control over impact parameters.
Optional high speed, fully integrated video system to provide visualization of specimen failure mode.
Optional liquid cooled temperature conditioning bath.
Responsive life-time technical support.