XPS 700
EN 13164 XPS700 · GB GB/T 10801.2 XPS700
GB/T 10801.2 XPS700 is the highest-strength grade in the standard extruded polystyrene range, rated at 700 kPa compressive strength with a declared thermal conductivity of 0.030 W/(m·K).
Reference datasheet — XPS 700 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the W condition
XPS 700 grades and fills
XPS 700 is supplied in 6 conditions, soft to hard. W is the default FabDigit quotes; the values on this page are for it.
Compare all 6 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Normalized | Pick when render, plaster or adhesive mortar must bond directly to the foam; accepts slightly higher λ and water absorption. | 0.45 | 0.5 | 2.5 | |
CO₂-blown / HCFC-free board | Choose for low-GWP or green-building credit projects; slightly higher initial λ than HFC-blown board but no blowing-agent drift penalty. | 0.55 | 2.5 | ||
B1 flame-retardant board | Mandatory FR level for most building envelope and public-works uses in China; higher FR loading, marginally lower strength. | 0.58 | 2.8 | ||
Graphite-enhanced (IR-absorber modified) high-load board | Use when the 700 kPa strength class must also hit the lowest available λ for thin build-ups; grey board, slightly more brittle. | 0.58 | 2.5 | ||
B2 flame-retardant board | Economy FR level for buried/covered structural fill and roadbed work where fire class B2 is accepted. | 0.6 | 3 | ||
WDefault Solution heat treated (unstable) | Default high-load board: smooth skin gives the lowest thermal conductivity and lowest water uptake, used for floors, roadbeds and cold-store floors. | 0.65 | 3 |
What is XPS 700?
GB/T 10801.2 XPS700 is the highest-strength grade in the standard extruded polystyrene range, rated at 700 kPa compressive strength with a declared thermal conductivity of 0.030 W/(m·K). It is specified for structural fill and insulation under heavy pavements, including airport pavements, and is supplied as extruded board in B1 or B2 fire classes, CO2-blown or graphite-modified. Thickness and edge profile are fixed on the extrusion line, it cannot be welded, and it needs protection from UV, bitumen and solvent-borne coatings. XPS500 is the lower-cost option when 700 kPa is not required. XPS 700 has a density of 0.05 g/cm³ (0.0017 lb/in³), lighter than 89% of polymer grades. Its glass-transition temperature is 100°C (212 °F). XPS 700 has a tensile strength of 0.65 MPa (0.0943 ksi), weaker than 86% of polymer grades. Elongation at break is 3% and the elastic modulus is 0.03 GPa (0.0044 Msi).
What is XPS 700 used for?
- Airport pavement insulation
- Heavy structural fill
- Load-bearing under-slab insulation for industrial floors
- Road and bridge approach frost protection
- Dock, ramp and deck insulation
- Cold store floor insulation
- Foundation and plinth insulation
Advantages
- Easy to machine — 90/100, better than 95% of polymer grades
- Lightweight — 0.05 g/cm³ (0.0017 lb/in³), better than 89% of polymer grades
Limitations
- Poor heat conductor — 0.03 W/m·K (0.0173 BTU/hr·ft·°F), worse than 96% of polymer grades
- Degrades in UV without stabilisers — 15/100, worse than 95% of polymer grades
- Limited ductility — 3%, worse than 83% of polymer grades
XPS 700 properties
Typical room-temperature values for XPS 700-W; bars are the position among polymer grades.
Physical4
XPS 700 has a density of 0.05 g/cm³ (0.0017 lb/in³), lighter than 89% of polymer grades. Its glass-transition temperature is 100°C (212 °F).
Mechanical9
XPS 700 has a tensile strength of 0.65 MPa (0.0943 ksi), weaker than 86% of polymer grades. Elongation at break is 3% and the elastic modulus is 0.03 GPa (0.0044 Msi).
Thermal9
XPS 700 is rated for continuous service to 75°C (167 °F). It conducts heat at 0.03 W/m·K (0.0173 BTU/hr·ft·°F), worse than 96% of polymer grades. Thermal expansion is 70 µm/m·K (38.9 µin/in·°F).
Electrical4
XPS 700 has an electrical resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental2
UV resistance is poor.
Sustainability4
Producing a kilogram of XPS 700 takes about 100 MJ of energy and emits 6.5 kg of CO₂ — less than 61% of polymer grades. Typical recycled content is 15%.
Manufacturability3
XPS 700's machinability is excellent (90/100, better than 95% of polymer grades); weldability poor (20/100); formability poor (25/100).
Common Calculations4
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the polymer family
Yield strength against density for every polymer grade FabDigit runs. XPS 700 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with XPS 700
Is XPS 700 easy to machine?
Cuts cleanly with hot wire, hot knife, fine-tooth band saw or CNC router at high feed; keep tools cool to avoid melt smear and use dust extraction.
Can XPS 700 be welded?
No practical structural welding; joints are shiplap/tongue-and-groove plus PS-compatible (solvent-free) adhesive or mechanical fixings.
Can XPS 700 be formed, bent or molded?
Supplied as extruded board only — thickness and edge profile (square edge, shiplap or tongue-and-groove) are set on the extrusion line; field shaping is by cutting, not forming.
XPS 700 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| blowing agent (CO2 / HFC-152a / HFO, resresidual gas in closed cells; determines aged λ | 1 – 5 | 3 |
| flame retardant (polymeric brominated FRlevel set by GB 8624 B1 or B2 target | 0.5 – 3 | 1.5 |
| nucleating agent (talc)controls cell size | 0.2 – 1 | 0.5 |
| pigment / IR absorber (graphite, carbon only in graphite-enhanced grades | 0 – 2 | 0 |
| polystyrene (styrene homopolymer resin)GPPS, optionally with recycled PS regrind | ≥ 90 (balance) |
What surface finishes work on XPS 700?
Skin must be planed, grooved or primed for mortar/plaster adhesion; protect from UV and from solvent-borne paints, bitumen and expanded-polystyrene-attacking adhesives.
Equivalent designations
Standards and trade names that resolve to XPS 700 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 13164 XPS700
- GB (China)
- GB/T 10801.2 XPS700
How much does XPS 700 cost?
XPS 700 is a standard-cost polymer ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
XPS 700 — frequently asked
What is XPS 700 used for?
XPS 700 is typically used for airport pavement insulation, heavy structural fill, load-bearing under-slab insulation for industrial floors, road and bridge approach frost protection, dock, ramp and deck insulation and cold store floor insulation. In short: strongest standard XPS grade; 700 kPa load class; structural fill insulation.
What is the tensile strength of XPS 700?
XPS 700 has a typical tensile strength of 0.65 MPa (0.0943 ksi) — weaker than 86% of polymer grades. Strength varies by condition: see the 6 listed tempers.
Is XPS 700 easy to machine?
Yes — machinability is rated excellent (90/100, better than 95% of polymer grades). Cuts cleanly with hot wire, hot knife, fine-tooth band saw or CNC router at high feed; keep tools cool to avoid melt smear and use dust extraction.
Can XPS 700 be welded?
Not readily — weldability is rated poor (20/100). No practical structural welding; joints are shiplap/tongue-and-groove plus PS-compatible (solvent-free) adhesive or mechanical fixings.
What surface finishes work on XPS 700?
Skin must be planed, grooved or primed for mortar/plaster adhesion; protect from UV and from solvent-borne paints, bitumen and expanded-polystyrene-attacking adhesives.
Can XPS 700 be formed, bent or molded?
Supplied as extruded board only — thickness and edge profile (square edge, shiplap or tongue-and-groove) are set on the extrusion line; field shaping is by cutting, not forming.
What is the maximum service temperature of XPS 700?
XPS 700 is rated for continuous use to about 75°C (167 °F), and briefly to 85°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between XPS 700 W and XPS 700 N?
W is the default condition — default high-load board: smooth skin gives the lowest thermal conductivity and lowest water uptake, used for floors, roadbeds and cold-store floors. N: pick when render, plaster or adhesive mortar must bond directly to the foam; accepts slightly higher λ and water absorption.
How much does XPS 700 cost?
XPS 700 is a standard-cost polymer ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM C578 Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation — ASTM (2022)
- STYROFOAM HIGHLOAD 100 / FOAMULAR 1000 high-load XPS technical data — DuPont Performance Building Solutions / Owens Corning (2023)
- Handbook of Polymeric Foams and Foam Technology (polystyrene foam chapters) — Hanser (2004)
- CES EduPack / ICE embodied energy and carbon data for XPS foam — Granta / Univ. of Bath (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.