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PMI X Series Foam: X-30 to X-350 Density and Mechanical Context

The X Series reference table extends from X-30 through X-350, creating a wider documented screening range. This article explains how to use those named entries without interpolating unlisted grades or disconnecting density from geometry, construction and validation.

Structural foam material macro view
Engineering archiveMaterial / process / article
01Project focus

Specific engineering search intent

02Project focus

Component, geometry, and process context

03Project focus

Controlled material and test-data reading

04Project focus

Project-specific technical review

Engineering record

01

Component context

02

Core & geometry

03

Process & review

Foam stock panels stored for material selection discussion
X Series contextStock form / series screening. Image is used as visual project context; it does not independently establish certification, tested performance, material availability or a named customer case.
01
Engineering note

Start with the engineering decision

Compare only the listed X Series entries and preserve their units, grade names and reference-document context. A series number or a higher density should not be treated as automatic suitability for an application. The actual component, temperature, load case and available evidence still govern the next decision.

02
Engineering note

Translate the component into a controlled core brief

Describe whether the part is a flat core, stepped panel, contoured form, local insert zone or CNC-prepared shape. Thickness, cut-outs, interfaces, facesheets and handling can determine which questions matter more than a density field alone.

03
Engineering note

Connect the material question to the process route

An X Series RFQ should state the requested grade, stock or finished form, dimensions, CAD, quantity, machining or bonding context and required documents. Any proposed route remains subject to review of the actual part and project requirements.

04
Engineering note

Keep technical evidence within its stated boundary

X Series entries are user-provided reference-document typical values. They are not guaranteed minimums, certified test results, design allowables or commitments for an unlisted grade, order or finished component.

Related questions

Questions that make the next engineering conversation more useful.

01Can X-30 to X-350 table entries be used as design allowables?

No. Use them for preliminary comparison only, then obtain material-specific evidence and validation for the actual construction and conditions.

02Why should a CAD model accompany an X Series enquiry?

The drawing clarifies thickness, features, contour and interfaces that determine how a series-level request must be reviewed.