Material reference pages, basic properties and related calculators for common engineering materials used in machining.
Material information for real shop work
Material names are often broad. A grade, temper or hardness condition gives more useful information than a family name alone. These pages provide practical context and connect the material to the calculators that use density, dimensions or cutting conditions.
Aluminum
Lightweight metal with high thermal conductivity and common CNC machining applications.
View Material →Brass
Common non ferrous machining material with a wide range of grades. Brass in CNC machining Brass is widely machined for fittings, hardware, electrical parts and turned components. Free cutting grades
View Material →Cast iron
Machining material with varied grades and abrasive wear behavior. Cast Iron in CNC machining Cast iron includes several grades with different strength, hardness and graphite structures. Many grades machine predictably,
View Material →Copper
High conductivity metal used for electrical and thermal components. Copper in CNC machining Copper is used for electrical, thermal and industrial parts. Its high thermal conductivity and tendency to smear
View Material →Engineering plastics
Acetal, nylon and other plastics with very different cutting behavior from metals. Engineering Plastics in CNC machining Engineering plastics such as acetal, nylon and UHMW PE do not behave like
View Material →Mild steel
Low carbon steel used widely for general machining and fabrication. Mild Steel in CNC machining Mild steel is a broad shop term for low carbon steels used in general machining,
View Material →Stainless steel
A broad family of alloys with different machining behavior. Stainless Steel in CNC machining Stainless steel covers many grades with different cutting behavior. Austenitic, ferritic, martensitic and precipitation hardening families
View Material →Titanium
High strength, low density material that needs controlled cutting conditions. Titanium in CNC machining Titanium combines high strength with relatively low density and is used where strength to weight matters.
View Material →Tool steel
High strength steel family used in dies, molds and wear components. Tool Steel in CNC machining Tool steels are used for dies, molds, wear components and high strength parts. Heat
View Material →Use material data with the right calculation
Material density is useful for weight and volume work. Material behavior is useful when reviewing cutting conditions. In either case, use the actual grade and source data when the number affects production, purchasing or inspection.
Related machining tools
Open the calculator library for feeds and speeds, milling, turning and drilling tools. Use the machining reference for quick tables and conversions.
Why material information matters
Material is part of the machining setup, not simply a label on the drawing. Grade, temper, hardness, condition and prior processing can change how a cutting edge behaves. The material pages on The True Machinists are designed to provide a practical starting reference and then point you toward the calculator, formula or guide that is relevant to the operation.
Common materials covered
- Aluminum
- Mild Steel
- Stainless Steel
- Brass
- Copper
- Titanium
- Cast Iron
- Tool Steel
- Engineering Plastics
Connect material information to the calculation
When you know the material and need a numerical result, move to the calculator library. Material weight and stock calculations use dimensions and density. Feeds and speeds use tool and process values that should be checked against the cutter manufacturer for the actual material grade and operation. The relationship matters because the same tool diameter can require different cutting conditions in different materials.
Do not treat a material family as one specification
A broad label such as stainless steel or aluminum covers multiple grades. Machining behavior can change with alloy, temper and hardness, so the material page should be treated as context rather than as a universal cutting table. When a value affects a production decision, verify the actual grade and the current supplier or tool manufacturer data.
Related resources for material planning
Use the machining reference for density and formulas. Use the machining guides when a process relationship needs explanation. Use Material Weight, Material Volume, Material Density and Stock Weight when the job requires a direct calculation.
Use the information with the real setup
The goal is to make the information easier to find, not to turn a reference page into a substitute for engineering documentation. Keep the drawing, material certificate, tooling information and machine limits with the final job information. The calculator gives you a transparent mathematical result. The setup determines whether that result is appropriate for the work.
Material information is part of the machining setup
The material name on a drawing is only the beginning. Grade, temper, hardness, condition and stock form can affect cutting behavior. This section gives a practical starting reference for common materials and keeps the related calculations close to the material information.
From material to machining condition
Start with the exact material when it is known. Then identify the operation and tool. Use the machining calculators for the numerical relationship and the machining guides when the process needs more explanation. The material page should provide context without pretending that one generic cutting value applies to every grade.
Use material data with the controlling source
For production work, verify critical material information against the drawing, material certificate, supplier specification or engineering standard. The True Machinists is a supporting reference designed to reduce search time and make related calculations easier to reach.