Quality Practices

A Complete Guide to European Standards

Standardization in the fastener industry is a necessity. Without fastener standards, there would be inconsistency and inefficiency. Because of fastener standards, engineers and consumers alike know exactly what to expect.

Because of the consistency that comes along with standards, international business and trade becomes much easier. Companies can purchase products from around the world and can rest easy knowing that the product will fit in their application. There are many organizations that create fastener standards; one of these organizations is the European Committee for Standardization.

In 1991, the European Committee for Standardization, also known as CEN, began working on the standardization of the fastener industry intended to be applicable throughout Europe. International Organization for Standardization (ISO) standards are adopted as European (EN) standards wherever possible. However, new EN standards are established when the ISO standards are not deemed suitable.

German Institute for Standardization (DIN) standards are being replaced by EN or ISO standards. In the future, DIN standards will apply only to products for which no ISO or EN standard exists.

DIN EN ISO plus a number (e.g. DIN EN ISO 4027) would indicate that a combination of all three standards are acceptable.

DIN ISO plus a number (e.g. DIN ISO 7049) indicates an ISO standard that is an adopted unchanged DIN standard.

Standards can sometimes be confusing. If you have any questions about fastener standardization, let us know by reaching out to us at ProvenProductivity@bossard.com.

 

Joe Stephan
Application Engineering
jstephan@bossard.com

September 29, 2017
Read More

Length of Engaged Thread

Length of Engaged Thread

Length of engagement is important to understand. The required minimum length of engagement changes for different materials and hardness of said materials. This is something that needs to be determined during the design process.

When screws need to be fully loaded in tensile, it is important to note the strength of the material that the ‘nut’, or female threaded component, is made of. The minimum length of the engaged thread will depend on it. Ultimately, it is important to achieve the required minimum length to give the joint the durability it needs.

Below are some examples of recommended minimum lengths of engaged thread in internal threads based on the material of the nut component for heat-treated steel bolts. These have been determined from practical trials:

Recommended minimum lengths of engaged thread in internal threads.

Make sure the toolbox of information needed to determine the proper length of engagement is readily available. Reach out to us at ProvenProductivity@bossard.com if there is any questions regarding this!

June 02, 2017
Read More

Fatigue Resistance in Fasteners

Fatigue Resistance in Fasteners

Simply put, you want your fasteners to hold up under many situations including conditions of changing load. However, some fasteners cannot hold up to the challenge. One of the most common forms of fastener failure is fatigue. That is why fatigue resistance and strength is something to look for in your fasteners.

A fastener can experience fatigue for a variety of reasons including assembly parameters, fastener material, geometry, and stress on the fastener. Fatigue often occurs in the first load-bearing part of the thread, and it can be detrimental to your project. This means your design must allow for screws to increase its fatigue strength. However, the fatigue strength of fine threads decreases with increased rigidity and fineness of thread, so there are some things to keep in mind with fatigue strength in your fasteners.

There are ways to increase the fatigue strength of your screws. These would include measures that reduce the effective peak stresses or prevent combined loading.

Check out some options for increasing your fatigue strength:

  • Use longer screws rather than shorter screws
  • Use screws with waisted shanks
  • Use pins or fitted shoulder screws to absorb lateral forces
  • Adequate and controlled pre-stressing of the screws

Reach out to us at ProvenProductivity@bossard.com to learn more about fatigue resistance and to find the fastener with the perfect fatigue strength for you.

May 26, 2017
Read More

Industry 4.0 and Smart Factory Logistics

smart factory methodology with Bossard

The purpose of a factory is to mass-produce goods. It allows for a company to make many products very quickly. Ultimately, the faster and better that companies can make products the more money they can make.

Factories have been around for a while, but now we are transitioning into something new—Smart Factories. “A new type of factory, so-called Smart Factories, are emerging worldwide. Manufacturers require flexible production lines and sites,” explains Urs Güttinger, Head of Smart Factory Logistics at Bossard. “Smart technologies enable this agile production at a fraction of the cost and time.”

At Bossard, we are on top of this new trend. We can help you make your factories smarter with our Smart Factory Logistics methodology. This methodology helps develop a leaner, faster and better process within your factories.

Bossard’s Smart Factory Logistics

  1. We provide a simple yet intelligent process – Smart Factory logistics is the complete system that manages your B- and C-parts. The proven methodology uncovers potential for improvement and it makes that potential a reality.
  2. We provide customized solutions – We have advanced technological systems like SmartBin and SmartLabel that provide real-time information about the parts you have and the parts you need. That way your factory is provided with exactly what you need, not what you might need.
  3. We provide transparency – Bossard has a supply chain collaboration software, ARIMS, that collects and processes the data from your specific factory. This software pulls together all the information you need from our systems like SmartBin and SmartLabel as well as other information you need to get the job done. This creates transparency between you and the customer as they can receive real-time information online.

If you are ready to step up and take your factory to the next level, contact us at ProvenProductivity@bossard.com. You can also find more information at the Bossard microsite www.smartfactorylogistics.com.


April 07, 2017
Read More

Is it Safe to Reuse Screws?

reuse screws

For many of us, the default is to try to reuse materials from previous projects to save on costs and because we already have those materials around. However, is it safe to reuse screws?

Check out this video for some quick rules on when you should or should not reuse screws:

As the video said, do NOT reuse screws if

  • They have exceeded the yield point
  • They have wear and tear from external loads
  • They will be used in critical applications

You can reuse screws, but if you are worried about the integrity of the screw, it might be best to get new fasteners.

If you have a specific question about a project or situation, reach out to us and we can give you the benefit of our expertise. Contact us at ProvenProductivity@bossard.com with any questions or concerns about fastener reuse!


January 27, 2017
Read More

A Closer Look at Austenitic Stainless Steel

austenitic stainless steel

Fastener Materials: A Closer Look at Austenitic Stainless Steel

When picking the fastener for your next project, you are going to want to consider the material it is made of. Many of our options include steel fasteners. The main options you have for steel are Low Carbon Steel, Medium Carbon Steel, Alloy Steel, Stainless Steel, or Austenitic Stainless Steel.

Stainless Steel
Stainless Steel is an alloy that combines carbon grades with chromium and nickel. To be Stainless Steel, the alloy must contain at least 10.5% chromium. Austenitic is a type of Stainless Steel. Let’s take a closer look at Austenitic Stainless Steel.

Austenitic Stainless Steel
Austenitic stainless steel has a chromium content between 15% and 20% and a nickel content between 5% and 19% and offers a higher degree of corrosion resistance than the other two types of stainless. The tensile strength of austenitic stainless steel varies between 72,000 psi and 115,000 psi (500 MPa to 800 MPa). 18-8 stainless steel is a type of austenitic stainless that contains approximately 18% chromium and 8% nickel. This group includes AISI grades 302, 303, 304, 304L, and 316.

Consider using Austenitic Stainless Steel in projects that need corrosion resistance or projects that involve exposure to high heat. Do you still have questions about fastener materials? Contact us at ProvenProductivity@bossard.com and we can set you up with the fastening solution that will fit just right.


December 23, 2016
Read More

A Closer Look at Stainless Steel

stainless steel

Fastener Materials: A Closer Look at Stainless Steel

Should I use Stainless Steel for fastening in my next project? That’s a good question. Fasteners come in a variety of materials and it is important to consider your project before you decide what material to use for it.

Many fastening options involve steel. The main options you have for steel are Low Carbon Steel, Medium Carbon Steel, Alloy Steel, Stainless Steel, or Austenitic Stainless Steel. Let’s take a closer look at Stainless Steel.

Stainless Steel
Stainless steel is made up of alloy steels that contain a minimum of 10.5% chromium content. The presence of chromium creates an invisible surface film that resists oxidation and makes the metal corrosion resistant. If the surface is damaged, it rebuilds itself in the presence of oxygen. It is important to understand the self-healing process because stainless steel used in a low oxygen surrounding is susceptible to aggressive influences if the protective surface layer becomes damaged.

Stainless steel is divided into three classes: Austenitic, Martensitic and Ferritic.

Stainless Steel fasteners are a good option when you need a fastener with high corrosion resistance because these fasteners will not easily deteriorate. If you have questions about Stainless Steel fasteners or need help in deciding on a fastener, contact us at ProvenProductivity@bossard.com. Our experts can help you get the materials you need for a successful project.


December 16, 2016
Read More

A Closer Look at Alloy Steel

alloy steel

Fastener Materials: A Closer Look at Alloy Steel

There are a lot of fastener options out there. When picking the fastener for your next project, you are going to want to consider the material it is made of. Many of our options include steel fasteners. The main options you have for steel are Low Carbon Steel, Medium Carbon Steel, Alloy Steel, Stainless Steel, or Austenitic Stainless Steel.

Carbon Steel
Low Carbon Steel, Medium Carbon Steel and Alloy Steel are all types of Carbon Steel. They are separated into these three groups because the mechanical properties of these fasteners are based on the amount of carbon in the fastener.

The vast majority of fasteners that are manufactured use carbon steel. This is because it is inexpensive, but also because it has a broad range of strength capabilities. Let’s take a closer look at one type of Carbon Steel: Alloy Steel.

Alloy Steel
Alloy steel is carbon steel that contains additives such as boron, manganese, chromium, silicon, etc. Additions of these elements improve the capacity of alloys to be heat treated to a wide range of strength and ductility combinations. However, the higher the strength the great the risk of hydrogen embrittlement if plated.

Alloy steels have a tensile strength in excess of 150,000 psi (1034 MPa).

SAE Grade 8 (metric class 10.9, 12.9) fasteners are made from alloy steel with AISI grades 4137, 4140, 4340, and 5140 falling into this category.

Still have some questions about fastener materials? Contact us at ProvenProductivity@bossard.com if you have questions. We are here to make sure your projects go smoothly!


December 09, 2016
Read More

A Closer Look at Medium Carbon Steel

medium carbon steel

Fastener Materials: A Closer Look at Medium Carbon Steel

What is the best material to use as a fastening solution for your next project? There are a lot of things to consider when asking yourself that question because you have a lot of options.

Many of our options include steel fasteners. The main options you have for steel are Low Carbon Steel, Medium Carbon Steel, Alloy Steel, Stainless Steel, or Austenitic Stainless Steel. Each of these materials have benefits and drawbacks and certain situations in which they perform best.

Carbon Steel
The vast majority of fasteners that are manufactured use carbon steel. This is because it is inexpensive, but also because it has a broad range of strength capabilities. The mechanical properties of these fasteners are based on the amount of carbon in the fastener; that is why these fasteners are classified into one of three groups: low carbon steel, medium carbon steel or alloy steel. Let’s take a closer look at Medium Carbon Steel.

Medium Carbon Steel
Medium carbon steel has a carbon content between 0.25% and 0.65%. It can be easily heat treated for added strength with very low risk of Hydrogen Embrittlement after plating. It has a tensile strength between 100,000 psi and 120,000 psi (690 MPa to 830 MPa).

SAE Grade 5 (metric class 8.8) is generally made from medium carbon steel with AISI grades 1038, 1040, 1045, 1541, 5132, and 5135 falling into this category.

If you still can’t decide what material you want to use for a fastener, contact us at ProvenProductivity@bossard.com. If you have any questions about finding the right fastener for your project, reach out because we are here to help!


December 02, 2016
Read More

A Closer Look at Low Carbon Steel

low carbon steel

Fastener Materials: A Closer Look at Low Carbon Steel

When taking the first step into finding fastening solutions, your biggest consideration will be what type of material will be required for the application. The main options you have for steel are Low Carbon Steel, Medium Carbon Steel, Alloy Steel, Stainless Steel, or Austenitic Stainless Steel. Performance of each type will be dictated by the requirements of the application.

Carbon Steel
Carbon Steel is inexpensive and it has a broad range of capabilities. That is why the majority of fasteners use carbon steel.

The mechanical properties of these fasteners are based on the amount of carbon in the fastener; that is why these fasteners are classified into one of three groups: low carbon steel, medium carbon steel or alloy steel. Let’s take a closer look at Low Carbon Steel.

Low Carbon Steel
Low carbon steel contains less than 0.25% carbon. It is very ductile, easily machined and can be welded. The low percentage of carbon lends itself to lower strength. Tensile strength typically will range from 60,000 psi to 80,000 psi (410 MPa to 550 MPa).

SAE Grade 2 (metric class 4.6, 4.8, 5.8) is usually made from low carbon steel with AISI grades 1006, 1010, 1016, 1018, 1022 and 1035.

Low Carbon Steel is a common material to use in fasteners. There are many advantages to using it. However, there are also other options for fastener materials. Deciding on the perfect fastener can be a challenge, but we’re here to help! Contact us at ProvenProductivity@bossard.com if you have any questions about finding the right fastener for your project.


November 18, 2016
Read More