What Type Of Bolts Do You Use To Retain Your Wear Plate?

At JADCO we want our customers and prospects to understand why one type of wear resistant steel can last 3 to 5 times longer than another piece of steel.

This Wear Plate Wednesday blog post will do so without putting you to sleep or using 50 cent metallurgical terms few people understand.

Let’s explain the differences by comparing steel wear plate to bolts. Regardless what industry you are in or where you live, you have used or see in bolts used to assemble every kind of equipment.

The most common hex head bolts are classified by grade. Grade 2, Grade 5 and Grade 8 are the most commonly used in the USA.

The markings let you know at a glance which Grade bolt is holding your equipment together. Take a look at the various bolt offerings the next time you are in your neighborhood hardware store. There are numerous options.


temp-post-image The markings on the head of the bolts instantly tell you the type of steel and the strength of the bolts.

Why Bolt Strengths Are Important To Understand The Differences In Wear Resistant Steel?

The easy answer is, bolt manufacturers must comply with the established SAE J429 Industry Standards. Anyone can make bolts, but they have to meet published minimum strength requirements. This makes it easy to select the correct bolt for your specific application.


The above chart shows the difference in the bolt strengths and material in the steel for each of these three types of bolts. For More Info.

Notice how the strength increases on Grade 5 when the bolt has been quenched and tempered. Both are made from medium Carbon steel, yet the quench and temper heat treating process dramatically increases the strength.

Looking at the description for the Grade 8 bolt; it is listed as medium Carbon ALLOY steel, and is quenched and tempered. The corresponding strength is again remarkably stronger.

“Grade 8 zinc plated alloy steel bolts are thru-heated and thru-hardened with a CR+5 zinc plating. This heat treatment adds a superior strength and corrosion resistance, to the extent that they are often used for armored vehicles and vehicle suspensions. Grade 8 bolts have six (6) evenly spaced hash marks on the head markings.” For More Info:

The Same Cannot Be Said Of Wear Resistant Steel

Because all steel feels hard to the touch, this often sounds strange and confusing to most people.

Without adding the correct alloying elements, in the proper ratios; the steel cannot achieve the same hardness though out the thickness of the steel.

In reality, without alloys the steel surface develops hardness only about 0.030” deep.

This means the hardness at the center of your wear plate is nearly the same as mild steel; between 120 and 180 BHN.


The thicker your plate, the Oreo cookie effect is more pronounced. This explains why your steel is softer in the center of the steel; and why it wears so much faster compared to the initial hard surface.

Your benefit in using through hardened steel is the even, progressive wear though out the thickness of the steel.


QT Plus ® contains high levels of Nickel, Chromium, Molybdenum and Boron among others.

Nickel is absolutely critical to create steel with the same hardness throughout the thickness of the plate, for maximum wear resistance. And also avoid the Oreo cookie effect. It makes so much of a difference we devoted our August 26, 2020 blog post to Nickel. Click Here For More Info on Nickel and Heat Treating:

Every day we educate prospective customers that steel wear plates ARE NOT THE SAME.

This is why JADCO’s percentage of repeat customer orders leads the wear resistant steel industry.

When customers first install our materials, they see we indeed do deliver longer life in their own equipment. It gives them the confidence to invest in additional application improvements.

This is how we develop a partnership to benefit our customers.

Isn’t it time you experienced the JADCO difference in your most challenging wear applications?

Rather than cover each alloy here, you can see it in our September 4, 2019 blog post by Clicking Here.

JADCO’s QT Plus ® delivers greater wear performance IN YOUR APPLICATIONS than the AR400 wear steel you have used previously.

Having the ability to create wear resistant steel having the same hardness through the entire thickness, requires precisely controlled chemistry and careful heat treating.

Why Doesn’t Every Steel Company Make Their Products Last As Long As JADCO QT Plus ®?

This attention to detail from the steel mill in Pennsylvania is actually available to anyone. However, most steel wear plate distributors choose to limit the proper quantities of these essential elements with the goal of a lower price.

They are planning to sell you more of the same in a few months, robbing more of your profits.

For the last 40 years we have focused exclusively on delivering consistent, longer life for our customers.

Now you understand why we deliver better results for our customers. We think differently by focusing only on your results.

Allow us to help you today by calling (724) 452-5252, or email

We will schedule a meeting with one of our local wear plate specialists at a time that best fits your schedule.