The Ultimate Guide to Mild Steel Cutting

How to cut mild steel efficiently and knowing what is the cutting speed of mild steel are common questions for industrial projects. Mild steel is widely used in construction, manufacturing and bespoke fabrication, but getting precise cuts requires the right method and understanding the material.

At RMP Products, we specialise in precision mild steel cutting. In this guide, we’ll explain the main cutting methods, discuss cutting speeds, cover material considerations and help you understand which approach is best for your project.

Why Cutting Mild Steel Correctly Matters?

Mild steel is a low-carbon steel known for its strength, malleability and affordability. Its composition typically contains 0.05–0.25% carbon, making it easier to cut than harder steels.

Choosing the right cutting method is crucial because it affects:

• Precision: Ensuring parts are cut to specification

• Efficiency: Minimising waste and saving time

• Safety: Reducing risk of accidents during cutting

• Finish quality: Reducing the need for post-cut finishing

Using the wrong cutting method can lead to wasted material, uneven edges or additional work. Understanding your options ensures a smooth, cost-effective process.

What Are the Main Methods for Cutting Mild Steel?

There are four primary methods used to cut mild steel, each suited to different thicknesses and applications:

1. Laser Cutting
Laser cutting is ideal for thin to medium sheets and highly detailed shapes. It produces smooth edges, reducing the need for finishing. Typical cutting speeds range from 3–20 m/min, depending on thickness.

2. Plasma Cutting
Plasma cutting works well for medium to thick plates. It is fast, cost-effectiv, and versatile for larger projects. Cutting speeds typically range from 1–10 m/min. Plasma cutting is commonly used in construction and manufacturing where speed and versatility are important.

3. Waterjet Cutting
Waterjet cutting uses high-pressure water mixed with abrasive to cut. It creates no heat-affected zone, making it ideal for parts sensitive to temperature. Speeds are slower, around 0.5–2 m/min, but it is extremely precise for complex shapes and projects requiring minimal distortion.

4. Flame Cutting
Also known as oxy-fuel cutting, flame cutting is used for thick mild steel plates. It involves heating the steel and blowing oxygen to cut through. Typical speeds are 0.5–2 m/min for very thick plates. The edges are rougher, but this method is cost-effective for heavy-duty structural work.

What Is the Cutting Speed of Mild Steel?

The cutting speed depends on the method, thickness and equipment. The following table summarises typical ranges:

Cutting Method	Typical Thickness	Cutting Speed Range
Laser	1–8 mm	3–20 m/min
Plasma	10–60 mm	1–10 m/min
Waterjet	1–8 mm+	0.5–2 m/min
Flame	20–300 mm	0.5–2 m/min

Conclusion – What are the Best Methods for Mild Steel Cutting?

Cutting mild steel effectively starts with understanding the different methods available and selecting the right one for your project’s material thickness and precision requirements. Knowing typical cutting speeds and edge quality helps ensure accuracy and efficiency.

For thin sheets and intricate parts, laser & waterjet cutting is ideal, while plasma offers versatility for medium thickness. Flame cutting works best for thick structural plates where cost and speed are priorities.

We have 30 years experience in mild steel cutting, offering both plasma cutting and flame cutting services. If you are looking to get a custom cut for your next project, contact us today for a free personalised quote.