4 Types Of Sheet Metal Testing For Better Innovation

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4 Types Of Sheet Metal Testing For Better  Innovation

April 13, 2022

 There are a lot of techniques to put in place to provide the metal with a specific shape, size, or quality. As one of the oldest metal manufacturing technologies, sheet metal forming continues to be reliable. Also, innovations in the industry continue to define its landscape.

It is necessary to undergo several sheet metal testing types before it fits to assemble or broader distribution.

 It aims to determine their characteristic values. Moreover, it provides manufacturers with a way to gauge metal formidability, strength, quality, etc.

Some of the most popular techniques include

– tensile

– fatigue

– hardness

– hole expansion.

It is best to perform under controlled conditions for more accurate results. Also, steel supplier in the Philippines provides the limitation of material deformity before any breakage.

Tensile Test

Tensile is the capability of a material to become stretched or drawn out until cracks or stresses begin to show. Another more common term is “tensile strength,” which is the resistance of breaking under impacts or pressures. These construction materials in the Philippines show their tensile strength rating in the past; they will break apart.

Why is Tensile strength Important?

 Tensile strength tests are necessary because they predict a given product’s reproducibility.

– It is beneficial for the mass production of metal goods. Wherein each product must have the exact measurements for tensile strength.

– It describes the limit of steel.

– Additionally, any ductile material transforms from temporary elasticity to permanent deformation.

– Also, it is possible for universal testing machines (UTMs) to be capable of other types of mechanical difficulties.

In this case, a small sample of sheet metal is loaded into the machine and drawn out. The operator records the specimen’s most significant load values, as shown on a computer screen.

Fatigue Test

A fatigue test is another type of metal testing method. Unlike tensile strength tests, a specimen is subject to only a single complete execution.

 It works under a cyclical load that adds stress to the material. Also, it works at a specific frequency or alternating load tests. Additionally, it aims to measure tension or compression.

Material failure in fatigue testing occurs when damage begins. Also, it is visible on the specimen after being subjected to frequent repetitions of stress. This type of testing is crucial in understanding why metal components that have been used for extended periods may fail. Often this failure occurs not because of a single overload. Yet, a specific timeframe draws a continuous pattern of cyclical stress.

2 categorization of Fatigue Testing

– High Cycle – it determines the finite life fatigue strength and the high cycle fatigue strength

 -Low Cycle

Examples of these two types in action are turbine blades or stationary power-generating turbines. It checks when it undergoes disc strain when in constant use.

Hardness Testing

Most mild steel or low carbon steel sheet metals that are 1.5 millimeters thick will likely have a Rockwell B hardness rating. Rockwell hardness is simply the measuring range that determines the resistance of a material to permanent deformity and penetration by another material. It is usually done for certain types of steel, such as tools and cutting steel engineered to be more durable than the typical.

Mild steel suppliers in the Philippines will record a Rockwell B hardness rating that falls in the mid to high 70s. There are three main components in this type of testing.

— the indenter,


-and specimen.

Here’s a brief illustration of the process:

It is best to press the minor load onto the specimen and generates a reference depth for the measurement. For Rockwell B, around 10 kg/cm2 of force is necessary

 It is best to press an additional load onto the surface of the sheet metal to achieve deeper penetration. It is removed then a minor load is re-applied.

The difference between the depth and the reference depth done on the material measures The Rockwell B hardness rating.

Hole Expansion Test

Hole expansion testing is specific for punched sheet metals. It assesses the flexibility (the material’s ability to be formed into a wire without breaking) on the sheet metal’s edges. This method is applicable especially for high-strength steel products, which face challenges on edge cracks when sheared.

The hole expansion test started with shearing a 10mm-diameter hole and widened using a conical punch at 60°. The resulting ratio of the expanded diameter to the initial measurement is subsequently known as the hole expansion ratio. Since shearing creates significant alterations to the material’s forming properties for sheet metal edges, this technique proves to be a fast and economical way of measuring the change.

Think Of It

As discussed, sheet metal testing types vary on what the manufacturer wants to measure regarding specific properties of a steel or metal sheet. Tensile strength tests, for example, determine the point at which the material starts displaying cracks after stretching. Fatigue testing determines cyclical material failure, while hardness testing and hole expansion tests measure resistance to permanent deformity and ductility.

These tests have been crucial for the sheet metal fabrication industry to continue coming up with quality construction materials Philippines for different manufacturing sectors. These methods will continue to be reliable and will no doubt pave the way for further innovations in sheet metal manufacturing.

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