GB/T 10801.2 XPS300 · flame-retardant grade
GB/T 10801.2 XPS300-B2
Properties of the B2 condition, compared with the other GB/T 10801.2 XPS300 grades.
Pick the cheaper ordinary grade only where B1 is not enforced — cold-store interlayers, packaging and underground frost-protection layers outside external wall insulation.
What is GB/T 10801.2 XPS300-B2?
GB/T 10801.2 XPS300-B2 is GB/T 10801.2 XPS300 in the B2 grade — pick the cheaper ordinary grade only where B1 is not enforced — cold-store interlayers, packaging and underground frost-protection layers outside external wall insulation. GB/T 10801.2 XPS300-B2 has a tensile strength of 0.5 MPa (0.0725 ksi), weaker than 89% of polymer grades. The elastic modulus is 0.01 GPa (0.002 Msi). GB/T 10801.2 XPS300-B2 has a density of 0.04 g/cm³ (0.0013 lb/in³), lighter than 92% of polymer grades. Its glass-transition temperature is 100°C (212 °F). B1 is the default condition FabDigit quotes; B2 is available on request or by drawing note.
Advantages
- Easy to machine — 95/100, better than 100% of polymer grades
- Lightweight — 0.04 g/cm³ (0.0013 lb/in³), better than 92% of polymer grades
Limitations
- Poor heat conductor — 0.03 W/m·K (0.0168 BTU/hr·ft·°F), worse than 98% of polymer grades
- Degrades in UV without stabilisers — 15/100, worse than 95% of polymer grades
- High embodied carbon — 8 kg CO₂/kg, worse than 83% of polymer grades
- Low stiffness — 0.01 GPa (0.002 Msi), worse than 79% of polymer grades
- Difficult to weld — 20/100, worse than 78% of polymer grades
GB/T 10801.2 XPS300-B2 properties
Typical room-temperature values for GB/T 10801.2 XPS300-B2 — 3 properties are specific to this condition; the rest are grade-level values shared by every GB/T 10801.2 XPS300 grade. Each bar shows where the value sits among the polymer grades in FabDigit's library — further right is higher.
Physical4
GB/T 10801.2 XPS300-B2 has a density of 0.04 g/cm³ (0.0013 lb/in³), lighter than 92% of polymer grades. Its glass-transition temperature is 100°C (212 °F).
Mechanical8
GB/T 10801.2 XPS300-B2 has a tensile strength of 0.5 MPa (0.0725 ksi), weaker than 89% of polymer grades. The elastic modulus is 0.01 GPa (0.002 Msi).
Thermal8
GB/T 10801.2 XPS300-B2 is rated for continuous service to 75°C (167 °F). It conducts heat at 0.03 W/m·K (0.0168 BTU/hr·ft·°F), worse than 98% of polymer grades. Thermal expansion is 70 µm/m·K (38.9 µin/in·°F).
Electrical4
GB/T 10801.2 XPS300-B2 has an electrical resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental2
UV resistance is poor.
Sustainability4
Producing a kilogram of GB/T 10801.2 XPS300-B2 takes about 100 MJ of energy and emits 8 kg of CO₂ — less than 61% of polymer grades. Typical recycled content is 15%.
Manufacturability4
GB/T 10801.2 XPS300-B2's machinability is excellent (95/100, better than 100% of polymer grades); weldability poor (20/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other GB/T 10801.2 XPS300 grades and fills
GB/T 10801.2 XPS300 is also supplied in 6 other conditions. The full side-by-side table is on the GB/T 10801.2 XPS300 overview.
- B1DefaultDefault selection for internal and external building insulation, underfloor heating and roofing: the polymeric brominated flame retardant meets GB 8624 B1 (class B/C) at 0.029 W/m·K.4 properties
- B2Pick the cheaper ordinary grade only where B1 is not enforced — cold-store interlayers, packaging and underground frost-protection layers outside external wall insulation.3 properties
Working with GB/T 10801.2 XPS300-B2
Is GB/T 10801.2 XPS300 easy to machine?
Hot wire, saw blade or utility knife all cut it at high speed, and grooving or routing needs no coolant. Excessive hot-wire temperature generates fumes, so ventilate the cutting area.
Can GB/T 10801.2 XPS300 be welded?
Not fusion weldable; seal board joints with polyurethane foam adhesive, water-based or solvent-free adhesive, or dedicated jointing tape. Do not use adhesives containing aromatic solvents.
Can GB/T 10801.2 XPS300 be formed, bent or molded?
Geometry is set on the extrusion foaming line, so finished board can only be cut and grooved. The rigid foam has a large minimum cold-bend radius and cracks readily when bent, so produce contoured parts by CNC cutting.
What surface finishes work on GB/T 10801.2 XPS300?
Scarify or groove the surface, or apply a bonding primer, before troweling polymer mortar over glass-fibre mesh. Do not leave it exposed to UV for long periods; exposed faces must be coated or shielded.
GB/T 10801.2 XPS300 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 / co-blowing agentresidual blowing gas in closed cells | 1 – 4 | 2.5 |
| flame retardant ( PolyFR, HBCD)required for class B1; can be reduced for class B2 | 0.5 – 2.5 | 1.2 |
| nucleating agent (talc )controls cell size | 0.2 – 1 | 0.5 |
| pigment /used for brand identification | 0.05 – 0.5 | 0.2 |
| polystyrene (PS, PS)mainly general-purpose or high-flow GPPS | ≥ 92 (balance) | — |
GB/T 10801.2 XPS300-B2 — frequently asked
What is GB/T 10801.2 XPS300-B2 used for?
GB/T 10801.2 XPS300-B2 is typically used for under-slab foundation insulation, parking deck insulation, inverted (protected-membrane) roof boards, perimeter and frost-wall insulation, cold storage floor insulation and render-carrier boards on exterior walls. In short: mid-load structural XPS; 300 kPa load class; 0.029 W/mK conductivity.
What is the tensile strength of GB/T 10801.2 XPS300-B2?
GB/T 10801.2 XPS300-B2 has a typical tensile strength of 0.5 MPa (0.0725 ksi) — weaker than 89% of polymer grades. Strength varies by condition: see the 7 listed tempers.
Is GB/T 10801.2 XPS300-B2 easy to machine?
Yes — machinability is rated excellent (95/100, better than 100% of polymer grades). Hot wire, saw blade or utility knife all cut it at high speed, and grooving or routing needs no coolant. Excessive hot-wire temperature generates fumes, so ventilate the cutting area.
Can GB/T 10801.2 XPS300-B2 be welded?
Not readily — weldability is rated poor (20/100). Not fusion weldable; seal board joints with polyurethane foam adhesive, water-based or solvent-free adhesive, or dedicated jointing tape. Do not use adhesives containing aromatic solvents.
What surface finishes work on GB/T 10801.2 XPS300-B2?
Scarify or groove the surface, or apply a bonding primer, before troweling polymer mortar over glass-fibre mesh. Do not leave it exposed to UV for long periods; exposed faces must be coated or shielded.
Can GB/T 10801.2 XPS300-B2 be formed, bent or molded?
Geometry is set on the extrusion foaming line, so finished board can only be cut and grooved. The rigid foam has a large minimum cold-bend radius and cracks readily when bent, so produce contoured parts by CNC cutting.
What is the maximum service temperature of GB/T 10801.2 XPS300-B2?
GB/T 10801.2 XPS300-B2 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.
Sources
- ASM Engineered Materials Handbook, Vol. 2 — Engineering Plastics (PS foams) — ASM International (1988)
- ICE / EPD XPS insulation board — University of Bath / EPD Programmes (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.