The materials grid shows you various information about the different materials. You can access the grid at menu Job | Materials. Below is a brief explanation of each field with links to more detailed information.
VRCost – approximate relative material cost by weight, but selecting a lower cost material may not always give the lowest cost job**. The lowest VRCost may not yield the lowest part cost because many factors effect the total job cost. For example, a lower cost material might be harder to machine or be more expensive to ship due to increased weight. And a material of the same cost as another might be less expensive because it’s weight is lower. The VRCost value is most relevant to job cost within a similar class of materials such as steels.
Machinability – How well the material machines. Selecting a material with good machinability may reduce cost and improve surface finish.
Usage – Some common uses for the material. There is generally no need to be concerned if your usage is not listed as most materials have too many uses to list.
Density – How heavy a material is per volume. For example if one material is twice as dense as another, your part will weigh twice as much if made out of the more dense material.
Melting point – The temperature at which the material changes from solid to liquid.
Hardness – How resistant material is to permanent shape change when a force is applied.
Hardness scale – The scale used for the Hardness value.
Yield strength – The stress at which a material begins to deform plastically.
Shear strength – Strength of a material against the type of yield or structural failure where the material or component fails in shear.
Tensile strength – Maximum stress a material can withstand while being stretched or pulled before necking which is when the material’s cross section starts to significantly contract.
Thermal conductivity – Ability to conduct heat.
Modulus of elasticity – Tendency to be deformed elastically (non-permanently) when a force is applied.
Weldability – How well material can be welded.
Availability – Approximate time in days it takes eMachineShop to acquire the material, which may influence the time to ship your parts.