CAGE Code 6TL87 | DUNS 015210349

Recent Posts

Axenics is ready for hydrogen fuel cell boom

Axenics is ready for hydrogen fuel cell boom

The hydrogen fuel cell market has a 34.3% compound annual growth rate, according to Market Insights Reports, reaching $5.925 billion by 2025, up from $1.82 billion in 2019. Hydrogen fuel cells are the future, with more vehicles - from garbage trucks to yachts -...

Common tube bending challenges and tube bending solutions

Common tube bending challenges and tube bending solutions

It’s often said that metal tube bending is both an art and a science. Finding success within art and science typically involves trial and error before accomplishment. Here are some common tube bending challenges – and tube bending solutions for success. Springback ...

How much does welding cost?

How much does welding cost?

We’re often asked “How much does welding cost” with regards to component manufacturing. There are several considerations that account for the cost of welding services, and it makes good business sense to do your due diligence when investing in outsourced welding...

Working with a Contract Manufacturer Outside Your Zip Code
We’re a good partner for you even when we’re socially distanced. Let us demonstrate how well we’ll work together whether we’re down the street or 3,000 miles away.

Tensile Strength and its Implication on Quality Control

by Nov 22, 2016Welding

Stainless Steel tubing is used in a wide variety of industries, including: Semiconductor, Medical, Life Sciences and Aerospace. While heavily-regulated industries like BioTech and Aerospace have stringent regulations and inspections, the Semiconductor industry has few systems in place to account for quality control.

Ensuring Full Penetration

When working with tubing, a properly-executed weld will be fully penetrated. Although ensuring full penetration takes an extra step in tube welding, it ultimately guarantees greater strength and resistance to breakage.

Inferior weld joints on tubing assemblies that might become installed into gas carrying systems have greater potential for failure over time. While most purchased assemblies within the Semiconductor industry have already passed a standard helium leak test, the majority of buyers do not require any further weld testing before purchase. And, unfortunately, the standard helium leak test will not detect a weld joint with lack of full penetration.

Therefore, although not required by all industries, a tensile-strength test should always be performed on a weld joint before it is put into production, in order to ensure the integrity of the weld. To avoid costly and dangerous issues attributed to failed tubing assemblies, it is imperative for buyers and industry experts to be sure that purchased products have been assessed for quality by their chosen supplier.

Calculating Tensile Strength

Ultimate tensile strength (often referred to as “tensile strength”) is the maximum stress that a material is able to withstand before failing or breaking. This is accomplished by using a machine to pull or stretch the material to its breaking point. The machine exerts increasing “pounds of force” until the material breaks.

Tensile strength can be measured by first taking the weld sample and cutting it in half, then flattening it. The following calculation can then be used to measure the tensile strength of the weld:

  1. Multiply: Width of Weld Sample by Height of Weld Sample = Area of Weld Sample
  2. Divide: Area of Weld Sample by Pounds of Force at breaking point
  3. Equals: PSI or Ultimate Strength

An Internal Tensile Strength Exercise

Axenics performed an internal tensile strength test by taking a sample of tubing with fully-penetrated welds and comparing it to a sample of tubing with non-penetrated welds. The results clearly showed that tubes with fully-penetrated welds broke at a much higher Ultimate Strength (PSI) than the partially-penetrated samples.

On the fully-penetrated samples, the breaking point was generally located outside of the weld joint, on the heat affected area of the tubing. However, 100% of the non-penetrated samples broke within the weld joint itself. This exercise proves just how crucial it is for a high level of performance in tube welding practices. You can download the full Tensile Strength Testing Report.

Choosing the Right Supplier

To ensure the products you purchase maintain the highest quality possible, it is essential to understand the testing and quality control procedures your supplier has in place. At Axenics, we have a number of systems in place to ensure quality, including performing tensile strength tests on random weld samples.

Tensile strength testing and performance

We recently conducted a test to prove to ourselves, and our customers, the value of a fully-penetrated weld versus a non-penetrated weld.

Read the report
Tensile Strength Report CTA

Related Posts

Share This

Share this post with your friends!