Carbon & Alloy Steel Machining Reference

Record More Than The Grade

Check whether the job information states heat treatment, hardness or a particular supplied condition. Use those details to locate the appropriate tooling reference. If they are missing, resolve the material identification instead of treating a familiar grade number as proof of machinability.

Match The Operation

Turning feed is commonly expressed per revolution. Milling tooth feed also requires the effective cutting-edge count. The same decimal value means a different linear feed when its unit changes. Keep the original unit visible beside each source value.

An Illustrative Turning Conversion

Suppose the selected input is 120 m/min at a 40 mm workpiece diameter. Calculated speed is about 955 RPM. A separately selected feed of 0.20 mm/rev corresponds to 191 mm/min at that RPM. Both source values are hypothetical for this calculation and must not be used as a steel recommendation.

A Changed Diameter Changes The Check

An RPM value copied from a different workpiece diameter produces another surface speed. Recalculate when the machining diameter changes and compare with the applicable tool data. For a milling job, check the actual cutter diameter rather than the shank diameter.

Open The Feed & Speed Calculator | Browse Material References

Steel Examples Need Their Supplied Condition

Carbon steel, alloy steel and wear plate are useful descriptions only when they remain attached to the actual specification. SSAB’s machining guidance directs readers to cutting-data brochures for its own products and discusses hardness, tooling and machine stability. That is a reason to identify the steel first, rather than transfer a generic cutting-speed value across unrelated grades.

Example Job Description	Missing Information To Resolve
A carbon-steel turned shaft	Drawing grade, supplied condition, relevant hardness and the actual insert reference.
An alloy-steel milled component	Material designation, heat treatment and the cutter supplier’s matching material category.
A specified wear-plate product	The exact product grade and producer machining instructions for that plate.

Use Case: Drilling A Specified Wear Plate

Start with the product and tooling instructions instead of assuming the conditions of a previous mild-steel hole. SSAB’s machining questions and cutting-data pointers provide producer-specific context. Use the drilling workspace only after source cutting speed and feed per revolution are established.

The job descriptions above are illustrative. SSAB guidance applies to its stated products and conditions; it does not identify an unknown steel or replace the toolmaker’s application data.

Steel Reference Questions

Is A Steel Grade Number Enough To Select Cutting Speed?

Not when the tooling source also distinguishes heat treatment or hardness. Resolve those details from the job information before choosing the source entry.

Why Does The Example Use Feed Per Revolution?

It illustrates a conventional turning relationship. For milling, the feed calculation also uses effective cutting teeth and source feed per tooth.

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