We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Is a Temper Mill?

By Ray Hawk
Updated May 17, 2024
Our promise to you
About Mechanics is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At About Mechanics, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A temper mill is a finishing facility that processes steel in the form of sheet and plate in order to give it added strength and uniform flatness to the surface. The metal forming method at a temper mill involves rolling the sheets of steel through what is known as a cold reducing process or temper pass. This increases the density of the steel by reducing its overall thickness between usually 1.5% to 2% without allowing the steel to spread out while under pressure. After steel has passed through a temper mill, it is more useful and reliable in manufacturing facilities that must shape it further or cut it with laser and plasma equipment.

Metal forming using a temper mill is an important stage in the steel manufacturing process. This is because milling work usually follows immediately after sheet or plate steel has been annealed, fired, and cooled. The annealing process tends to relieve micro-crystalline stress to such a degree in the steel that it displays a tendency to bend in non-uniform ways. This propensity for stretching in some areas and not in others along the surface is what the temper mill eliminates by reducing the steel volume by anywhere from 0.5% to 3.5% of its overall thickness.

The steel sheets that are run through a temper mill go through a fairly simple procedure. They arrive in the form of coils of sheet steel that are manufactured in a hot strip mill, or what is commonly known as a pickle line. A machine known as an uncoiler unwraps these rolls of steel and feeds them into the mill. The steel mill also controls the extensions, or ends of the steel, as it is processed and prevents yield point elongation (YPE). Yield point elongation is a deformity that can occur where discontinuous regions succumb to strain from pressure and stretch or flatten out.

After the steel has passed through the mill, its surface layer is more uniform. A pinch roll or shear may also be present at this stage, which is used to cut the steel into smaller finished segments. A machine known as a recoiler then takes the steel as it exits the temper mill and rolls it up once again, ensuring that the sides are straight as well.

Many modern temper mill machines are automated, with each feature in steel plate processing being precisely controlled. These features can include automatic constant rolling force and elongation controls (AFC) and (AEC), as well as automated position and tension controls (APC) and (ATC). The loading and unloading of the steel coil from the machines that feed the temper mill and take off the finished product can also be automated, and this can include a high-pressure water feed that prevents crimping of the steel in the rolling process. Typical speeds for an automated temper mill range from 656 to 2,953 feet (200 to 900 meters) of steel per minute depending on the production schedule of the facility.

About Mechanics is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.

About Mechanics, in your inbox

Our latest articles, guides, and more, delivered daily.