Drop Weight Tester for Pellini Tests

The drop weight test as described by W.S. Pellini (Pellini test) is used to investigate the brittle fracture tendency of steels for comparative evaluation of crack arrest behavior to ASTM E208 and SEP 1325. 
Drop weight test to W.S. Pellini / Pellini test

W.S. Pellini Drop Weight Test

During the Pellini test, weights fall onto a rectangular flexure specimen supported at both ends, causing a brittle fracture on the tensile side of the specimen within a given total deflection. This brittle fracture is initiated by a notched welding bead laid on this side and known as the crack starter.

In this Pellini test it is determined whether the brittle fracture caused by the artificial crack-starter spreads as far as one of the two side faces of the specimen, or is arrested before. If the fracture extends to one of the two side faces, the specimen is considered broken.

Technical Overview

  • Pellini drop weight testers are available in 550 J and 1650 J versions. 
  • The maximum fall height is 1 meter or 1.3 meters.
  • In accordance with standards (ASTM E208 and SEP 1325), the predefined drop-energies are easily obtained with the use of weights. Drop energy is calculated automatically.

Advantages & Features

  • Modular "building block" system with two sizes
  • Interchangeable flexure inserts and fixtures.
  • Electrical and mechanical test-area safeguards with safety circuit - the test does not begin until all safety switch contacts have been interrogated.
  • Independent pneumatically operated safety interlocking safeguards test area against accidents
  • Touchscreen operation with electronic display of drop height, drop energy, drop weight and impact velocity (theoretically)
  • The steplessly adjustable drop height is automatically achieved after input of drop weight and drop energy
  • No extra foundation required. Floor must be capable of carrying a specific load of 0.3 kg/cm²

Technical Data

Model

P550

P1650

Item No.

022317

024571

Drop energy

340 ... 550

340 ... 1650

J

Drop height max.

1000

1300

mm

Drop weight

24.8 ... 56

24.8 ... 130

kg

Total weight

2534

2620

kg

Drop speed max.

4.4

5

m/s

Dimensions

A – height approx.

3074

3374

mm

B – width approx.

1550

1550

mm

C – depth approx.

840

840

mm

Power rating

2

2

kW

Compressed air

8

8

bar

Specimens

P1

no

yes

P2

yes

yes

P3

yes

yes

P4

yes

yes

Specimen dimensions

Specimen dimensions SEP 

Thickness

Width

Length
25 ± 0.3

mm

90 ± 2.0

P1

360 ± 10
19 ± 0.2

mm

50 ± 1.0

P2

130 ± 10
16 ± 0.2

mm

50 ± 1.0

P3

130 ± 10
13 ± 0.2

mm

50 ± 1.0

P4

130 ± 10

Specimen dimensions ASTM

Thickness

Width

Length
15.9

mm

51

P3

127

19

mm

51

P2

127
25.4

mm

89

P1

356

Layout

Drop Weight Tester for Pellini Tests

Layout drop weight test to W.S. Pellini / Pellini test
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