Named grade and density direction
Typical room-temperature properties
130°C compression reference values
XK52 sample-test context and data boundary
Typical values / supplied Chinese PMI TDS
Named grades, with the source boundary visible.
| Grade | Density kg/m³ | Comp. MPa | Comp. mod. MPa | Tensile MPa | Tensile mod. MPa | 130°C comp. MPa | 130°C mod. MPa | Shear MPa | Shear mod. MPa |
|---|---|---|---|---|---|---|---|---|---|
| XK32 | 32±4 | 0.44 | 23 | 0.88 | 47 | 0.36 | 18 | 0.48 | 13 |
| XK52 | 52±5 | 1.00 | 44 | 1.70 | 74 | 0.71 | 33 | 0.92 | 23 |
| XK75 | 75±7 | 1.70 | 72 | 2.60 | 120 | 1.10 | 52 | 1.60 | 30 |
| CK52 | 52±5 | 0.81 | 37 | 1.40 | 74 | 0.60 | 30 | 1.10 | 32 |
| CK72 | 72±7 | 1.60 | 57 | 2.20 | 110 | 1.20 | 49 | 1.60 | 42 |
| CX40 | 45±5 | 0.82 | 40 | 1.00 | 51 | 0.65 | 33 | 0.45 | 14 |
| CX75 | 75±7 | 1.80 | 55 | 2.30 | 106 | 1.20 | 55 | 1.20 | 27 |
| CX110 | 95±10 | 2.40 | 86 | 2.80 | 170 | 1.40 | 63 | 2.00 | 62 |
| XK110-HT | 110±15 | 2.50 | 80 | 2.60 | 135 | 1.40 | 64 | 2.40 | 50 |
XK52 single-test samples / disclosed context
Room-temperature compression: 1.14 MPa at 50.92 kg/m³ and 1.18 MPa at 52.17 kg/m³. 130°C, 30-minute compression: 0.76 MPa at 49.23 kg/m³. Each is a single-test sample result—not a guaranteed product specification.
XK52 thermal and tensile sample context
Room-temperature tensile sample: 1.99 MPa strength, 74.70 MPa modulus and 3.36% elongation at 56.27 kg/m³. At 130°C×3 h, a sample recorded 0.26% length, 0.29% width and 0.34% thickness change.
Use the grade name before comparing a number
The matrix below is transcribed from the supplied Chinese PMI TDS for XK, CK and CX named grades. The source document states that values are for reference and not guaranteed values. Grade name, density, process conditions, thickness, core form and component requirements must therefore remain attached to every technical discussion.
Keep room-temperature and elevated-temperature data separate
Compression, tensile and shear values answer different material questions. In particular, the 130°C compression fields in the TDS are not interchangeable with room-temperature compression data. A buyer should request the applicable current datasheet and state the actual temperature, dwell, pressure or vacuum context before using the values in a project decision.
Read XK52 test reports as samples, not product guarantees
The audited XK52 reports provide transparent example data: room-temperature compression samples recorded 1.14 MPa at 50.92 kg/m3 and 1.18 MPa at 52.17 kg/m3; a 130°C, 30-minute sample recorded 0.76 MPa at 49.23 kg/m3. The disclosed room-temperature tensile sample recorded 1.99 MPa tensile strength, 74.70 MPa tensile modulus and 3.36% elongation at 56.27 kg/m3. Each is a single-test sample result under its stated condition, not a guaranteed range.
Connect the data table to the actual core geometry
A density-class and property table cannot define a complete sandwich structure. Submit the component, thickness, core form, CAD or drawing, laminate and process route, temperature context, quality expectation and the decision that requires confirmation. Peter can coordinate a technical-data request against the project rather than provide an unsupported generic approval.
Related questions
Questions that make the next engineering conversation more useful.
01Are the PMI foam values on this page guaranteed supply values?
No. The visible product table is based on typical values from the supplied TDS, which states that its data are for reference and are not guarantees. Confirm the applicable current datasheet and project requirements before release.
02Why do the XK52 single-test reports differ from the typical TDS values?
They were recorded on individual samples with their own density, temperature, specimen and loading conditions. They are useful test context but should not be merged into a new universal specification.
03Can I obtain grade-specific documentation for a real project?
Yes. Use the technical RFQ path with the component, core form, process context and any requested values or test conditions so the applicable document can be confirmed.