FINE GROUP'S
 
 
Jomini Test Fixture
 

Jomini Test Fixture

Jomini Test Fixture ( Model : MJOM-25 )

   
The most commonly used method for determining hardenability is the end quench test developed by Jomini and Boegehold. The details of the test are covered in IS : 3848 – 1981 and ASTM A 255.
In this test a normalized 25 mm diameter and 100 mm length test sample of steel to be evaluated is heated uniformly to its austenitizing temperature. The specimen is then removed from the furnace and placed in the end quench test Apparatus and immediately end quenched by a jet of room temp. water.
After end quenching, longitudinal Flat Surfaces are ground on opposite sides of the test piece as per dimensions. This grinding is very important for correct positioning of the sample in the fixture and also for accurate repeatable and reliable test results.
Jomini Test Fixture is to be positioned on the main screw of the hardness tester for checking hardness of the test sample. Hardness at equal intervals (1 mm or /16”) to be checked and noted. Plot the resulting data on graph paper with hardness value as ordinate (Y axis) and distance from the quenched end as abscissa (X axis). By comparing the curves resulting from end quench tests of different grades of steels, their relative hardenability can be established. Thus the flatter the curve, the greater the hardenability.
 
Technical Specifications -
 

Total length of test piece (mm)

100 ± 0.5

Dia of test piece (mm)

25 + 0.5
     -  0.0

Inside dia of vertical water supply pipe (mm)

12.5 ± 0.5

Height of the free water jet (without test piece in position) (mm)

65 ± 10

Distance from Tip of nozzle to the bottom of test piece (mm)

12.5 ± 0.5

Power supply

1 Ph, 230V, 50 Hz AC

Overall dimension (approx) (mm)

375 (L) x 285 (B) x 650 (H)

Net weight (approx) (Kg)

35

 
 
 
Universal Testing Machines Impact Testing Machines Tensile Testing Machines  Computer Servo Controlled Ball Screw Driven Universal Testing Machines Compression Testing Machines Spring Testing Machines Horizontal Chain and Rope Testing Machines Micro Vickers Hardness Testers Automatic Optical Brinell Hardness Testers Mechanical Extensometer Special Custom Built Testing Machines Motorised Impact Testing Machines WOM Type Brinell Hardness Testing Machines Drop Weight Impact Testings Bend Rebend Testings Transverse Testing for Rails Rockwell Hardness Testers Rockwell Cum Rockwell Superficial Hardness Testers Rockwell Cum Brinell Hardness Testers Portable Rockwell Hardness Testers Digital Torsion Testing Machines Digital Fatigue Testing Machines End Quench Test Apparatus Electronic Extensometer Boss Microscope with software - for finding out Brinell Hardness value ENT Surgical Microscopes Ophthalmic Surgical Microscopes Digital Endoscopy Camera A-Scan Biometer Skin Graft Expander Beam Splitter Single Clip CCD Camera Cold Light Source Fiber Optic Head Light Brinell Hardness Testing Machine Optical Brinell Hardness Testing Machine Digital Torsion Testing Machine Digital Fatigue Testing Machine End Quench Test Apparatus Jomini Test Fixture ASTM Pendulum Impact Testing Machines (Analogue & Digital Versions) Accessory of Pendulum Impact Testing Machine Profile Projector