Mechanical Testing Machine

Tensile Testing

Tests are performed as per the ASTM E8, ASTM A370, ASTM B557, IS/ BS Standards. A tensile test measures the resistance of a material to a static or slowly applied force. A machined specimen is placed in the testing machine and load is applied. A strain gage or extensometer is used to measure elongation. The stress obtained at the highest applied force is the Tensile Strength. The Yield Strength is the stress at which a prescribed amount of plastic deformation (commonly 0.2%) is produced. Elongation describes the extent to which the specimen stretched before fracture. Information concerning the strength, stiffness, and ductility of a material can be obtained from a tensile test. Variations of the tensile testing include; Room Temperature, Low Temperature, Elevated Temperature (ASTM E21), Shear, Temperature and Humidity, Combined Tension and Compression, Through Thickness, True Strain, Notched Tensile, and r (ASTM E646) & n (ASTM E517) values.

Bend

Bend testing is a procedure to determine the relative ductility of metal that is to be formed (usually sheet, strip, plate or wire) or to determine soundness and toughness of metal (after welding, etc.) The specimen is usually bent over a specified diameter mandrel. The four general types of bends are; free bend, guided bend (ASTM E190), semi-guided bend (ASTM E290), and wrap around bend.

Compression

Compression testing is a method for assessing the ability of a material to withstand compressive loads. This test is commonly used as a simple measure of workability of metal, particularly in forging and similar bulk deformation processes. Engine mounts, bolster springs, cast products, and similar components are tested to determine load versus displacement.

Ring Flaring Test, ASTM A513

This Procedure tests the ability of a section of tube approximately 4" in length to flare (with a tool having a 60° included angle) until the tube at the mouth of the flare has been expanded 15% of the inside diameter, without cracking or showing flaws.

Ring Flattening Test, ASTM A513

A tube sample 4" - 6" in length is flattened between parallel plates with the weld 90° from the direction of applied force until opposite walls of the tubing meet. Applications for this test along with the flaring test include situations where round tubing is to be formed into other shapes.

Brinell, ASTM E10 and IS/ BS Standard

This is a simple indentation test for determining the hardness of a wide variety of materials. The test consists of applying a prescribed load, usually between 500kg and 3000kg for a specified time (10-30 seconds) using a 5 or 10mm diameter tungsten carbide ball on the flat surface of a metal sample.