Quick Answer

1080 carbon steel is a type of low-carbon cold-rolled steel that is easy to work with, very precise, and has a fairly smooth surface. A36 carbon steel is a kind of hot-rolled steel that is strong, tough, and not too expensive.

1080 is good for pieces that need to be very precise since it lets you regulate tolerances very tightly and get a smooth surface. A36 is good for building something that will be used a lot.

Introduction

A36 and 1080 are two types of steel that are often used in construction, heavy machinery, and mechanical manufacture. If you work in these fields, you may come into these two steels a lot. So what do these two steels have in common? You need to know a lot about their mechanical qualities and uses, as well as how they are alike and different.

This article will provide you a full introduction to these two kinds of steel, including their mechanical properties, uses, and how they are alike and different.

What Is 1018 Carbon Steel?

The AISI 10XX series includes 1080 carbon steel, which is a form of cold-rolled low-carbon steel. It has about 0.18% carbon in it. Its production procedure includes processing at room temperature, which keeps the surface smooth and the dimensions accurate.

Key Characteristics of 1018 Carbon Steel

Iron (about 99%), Carbon (0.15–0.20%), Manganese (around 0.6–0.9%), Phosphorus, and Sulfur are all in it.

Strength in tension: 440–650 MPa.
Strength at Yield: ~370 MPa.
Hardness: 120 to 170 HB.

How it was made: cold rolled.

Yes, it is magnetic. Low corrosion resistance (needs coatings)

Common Uses:

Mechanical parts
Car parts and bases
Fasteners
Bolts, and nuts
Precision machined parts

Some mechanical engineers favor 1080 for precision part machining since it is quite stable. It can keep the surface smooth while yet being easy to work with.

What Is A36 Steel?

The ASTM A36 standard says that A36 steel is a type of hot-rolled steel. It usually has about 0.25% carbon in it. It is known for being easy to weld, durable, and not too expensive. It is mostly utilized for parts of massive structures that need to hold weight.

Key Characteristics of A36 Steel

Composition: Iron (~99%), Carbon (0.25%), Manganese (0.8–1.2%), Silicon (≤0.4%)
Tensile Strength: 400–550 MPa
Yield Strength: Minimum 250 MPa (ASTM standard)
Hardness: 119–162 HB
Production Method: Hot rolled
Magnetic: Yes
Corrosion Resistance: Low (needs paint or galvanizing)

Common Uses

Beams, plates, and other things that hold up structuresBridges and buildingsBases and frames for machinesBuilding materials for general use

A36 is strong and not too expensive. It is often used as a basis for some construction and heavy-duty gear.

Composition and Manufacturing Differences

The chemical makeups of A36 and 1080 are almost the same, however the ways they are made are different. Cold rolling is done to 1080, which makes it easier to regulate its tolerances.
A36 is hot-rolled and has excellent ductility, which means it can bend without breaking.

Mechanical Properties Comparison

To sum up

• 1080 steel has a higher yield strength but a lower ductility.
• A36 steel is not as strong as other steels, but it is quite flexible.

Surface Finish and Tolerance

The surface polish and tolerance of these two types of steel are different because they are made in distinct ways.

• Because A36 is hot-rolled, its surface is not very smooth. It needs to be ground and polished if a superior surface finish is needed.
• Because 1080 is cold-rolled, its surface is rather smooth and its tolerance dimensions are modest. It works for some pieces that need to be machined to a high level of accuracy.

The best way to choose raw materials is to think about what your own product needs.

Weldability and Machinability

Weldability

1080 can be welded well, however in some cases where welding is quite severe, post-weld stress relief is needed since the weld seam area gets a little harder.
A36 is better for welding since it is quite ductile.

Machinability

How easy it is to machine 1080 is a steel that is easy to work with and has great machinability. Also, the surface is smooth.

A36 is processed by hot rolling, which can leave behind hot rolling oxide scale. This can make the hardness of different batches vary. Because of this, there may be some problems with processing different batches.

In short

You should choose 1080 if you need strict tolerance levels. A36 is a superior choice for welding frames and heavy-duty parts.

Applications and Use Cases

The shows that 1080 is utilized for small parts that need to be very precise and are easy to work with.

A36 is utilized for strong mechanical structures and heavy-duty parts.

The price of A36 is lower than before based on cost and market research.

Cost and Availability

After cold rolling, 1080 needs to go through a second processing step to improve its performance because it has tight tolerance requirements. Because of this, its price is usually greater.

Pros and Cons Summary Table

Which One Should You Choose?

The specific options for the two kinds of steel are as follows:

Pieces made of 1080 carbon steel need to be machined very carefully, and the product needs to have a smooth surface and rigorous tolerances, especially for smaller pieces.

A36 steel is used to make some heavy-duty equipment that needs to be strong. Products produced with this steel are cheaper if they are easy to weld and can hold a lot of weight.

Summary

The information above is a full introduction to these two kinds of steel. I hope this helps you decide which one to chose.

1080 is a type of cold-rolled steel that is easy to work with, precise, and has a smooth surface. It is often used to make precise pieces.

A36 is a hot-rolled steel that is strong and easy to weld. People often utilize it in big machines.