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XENOY™ 6370: High-Toughness, Ductile PC+PBT Plastic
Product Struction
What is XENOY™ 6370
When sourcing engineering plastics, decision-makers rarely look at strength alone. Toughness, dimensional control, and the way a material behaves in processing all weigh into the choice. For many buyers, XENOY™ 6370 (PC+PBT, glass fiber reinforced) has become a practical solution. It combines polycarbonate and polybutylene terephthalate, is reinforced with 30% glass fiber, and is impact-modified—giving it an unusual mix of stiffness and ductility that is hard to achieve with single polymers.
01 | Material Highlights
Structural stability with reinforcement
With 30% glass fiber, the grade holds its shape under load and resists creep, which is particularly useful in parts exposed to constant stress.Ductility and toughness
Unlike some rigid plastics that tend to crack under shock, this material can flex without breaking. Even in low-temperature environments, it resists brittle failure. That makes it workable for snap-fit designs and thin-walled parts where breakage risk is high.Thermal resistance
Mechanical properties remain reliable at elevated temperatures, so it is often chosen for components located near heat sources such as engine compartments or power electronics housings.Electrical insulation
Its dielectric strength and volume resistivity make it dependable for switches, connectors, and other current-carrying parts.Dimensional precision
The relatively low shrinkage rate helps manufacturers hold tighter tolerances in injection molding. Complex molds and assemblies benefit directly from this.
02 | Typical Applications
Automotive – bumper frames, under-hood components, brackets, battery module housings.
Electrical & electronics – switches, connectors, insulation covers.
Industrial equipment – gears, shields, and other parts where both impact and chemical resistance are needed.
Consumer products – sturdy yet lightweight housings that improve user safety and product lifetime.
03 | XENOY™ 6370 Data Sheet
UL | Condition | Standard | Value | Unit | |||
CTI | IEC 60112 | 2 | PLC | ||||
HAI | All Color 1.5mm | UL 746A | 3 | PLC | |||
HAI | All Color 3.0mm | UL 746A | 3 | PLC | |||
HVTR | UL 746A | 1 | PLC | ||||
HWI | All Color 1.5mm | UL 746A | 2 | PLC | |||
HWI | All Color 3.0mm | UL 746A | 1 | PLC | |||
RTI | Elec All Color 1.5mm | UL 746B | 140 | °C | |||
RTI | Elec All Color 3.0mm | UL 746B | 140 | °C | |||
RTI | Imp All Color 1.5mm | UL 746B | 130 | °C | |||
RTI | Imp All Color 3.0mm | UL 746B | 130 | °C | |||
RTI | Str All Color 1.5mm | UL 746B | 140 | °C | |||
RTI | Str All Color 3.0mm | UL 746B | 140 | °C | |||
Volume Resistivity | ASTM D257 | 1E15 | Ω.cm | ||||
Dimensional Stability | UL746 | 0.0 | % | ||||
Dielectric Strength | ASTM D149 | 38 | KV/mm | ||||
Arc Resistance | ASTM D495 | 5 | PLC | ||||
Flame Rating | All Color 1.5mm | UL94 | HB | ||||
Flame Rating | All Color 3.0mm | UL94 | HB | ||||
Mechanical behavior | Condition | Standard | Value | Unit | |||
Elongation | Yield 5mm/min | ASTM D638 | 3 | % | |||
Elongation | Yield 5mm/min | ISO 527 | 3 | % | |||
Elongation | Break 5mm/min | ASTM D638 | 4 | % | |||
Elongation | Break 5mm/min | ISO 527 | 3 | % | |||
Flexural Strength | Yield 1.3mm/min | ASTM D790 | 150 | MPa | |||
Flexural Strength | Yield 2.0mm/min | ISO 178 | 154 | MPa | |||
Flexural Strength | Break 1.3mm/min | ASTM D790 | 138 | MPa | |||
Flexural Modulus | 1.3mm/min | ASTM D790 | 5370 | MPa | |||
Flexural Modulus | 2.0mm/min | ISO 178 | 7750 | MPa | |||
Izod Un-notch Impact | 23°C | ASTM D4812 | 65.30 | kJ/m² | |||
Izod Notch Impact | 23°C | ASTM D256 | 17.34 | kJ/m² | |||
Izod Notch Impact | 23°C 4.0mm | ISO 180 | 10 | kJ/m² | |||
Izod Notch Impact | -30°C | ASTM D256 | 11.42 | kJ/m² | |||
Izod Notch Impact | -30°C 4.0mm | ISO 180 | 6 | kJ/m² | |||
Tensile Strength | Break 5mm/min | ASTM D638 | 91 | MPa | |||
Tensile Strength | Break 5mm/min | ISO 527 | 105 | MPa | |||
Tensile Strength | Yield 5mm/min | ASTM D638 | 97 | MPa | |||
Tensile Strength | Yield 5mm/min | ISO 527 | 105 | MPa | |||
Tensile Modulus | 1.0mm/min | ISO 527 | 8500 | MPa | |||
Tensile Modulus | 5mm/min | ASTM D638 | 9750 | MPa | |||
Charpy Notch Impact | 23°C 4.0mm | ISO 179 | 9 | kJ/m² | |||
Thermal | Condition | Standard | Value | Unit | |||
HDT | 1.8MPa 4.0mm | ISO 75 | 155 | °C | |||
HDT | Unanealed 0.45MPa 6.4mm | ASTM D648 | 204 | °C | |||
HDT | Unanealed 1.8MPa 6.4mm | ASTM D648 | 149 | °C | |||
CLE | Flow -40.0~40°C | ASTM E831 | 2.7E-5 | cm/cm/°C | |||
CLE | Flow -40.0~40°C | ISO 11359 | 2.7E-5 | cm/cm/°C | |||
CLE | Flow 60~138°C | ASTM E831 | 1.98E-5 | cm/cm/°C | |||
CLE | xFlow -40.0~40°C | ASTM E831 | 1.1E-4 | cm/cm/°C | |||
CLE | xFlow -40.0~40°C | ISO 11359 | 1.1E-4 | cm/cm/°C | |||
Vicat Softening Temperature | 50°C/hr 50N | ASTM D1525 | 153 | °C | |||
Vicat Softening Temperature | 50°C/hr 50N | ISO 306 | 148 | °C | |||
Vicat Softening Temperature | 120°C/hr 50N | ISO 306 | 150 | °C | |||
Physical property | Condition | Standard | Value | Unit | |||
Water Absorption | 24hr | ASTM D570 | 0.09 | % | |||
Water Absorption | 23°C Saturation | ISO 62 | 0.5 | % | |||
Water Absorption | 23°C 50RH | ISO 62 | 0.15 | % | |||
Shrinkage | Flow 0.75-2.30mm | INTERNAL METHOD | 0.3~0.4 | % | |||
Shrinkage | Flow 2.3-4.6mm | INTERNAL METHOD | 0.4~0.5 | % | |||
Shrinkage | xFlow 0.75-2.30mm | INTERNAL METHOD | 0.4~0.7 | % | |||
Shrinkage | xFlow 2.3-4.6mm | INTERNAL METHOD | 0.7~0.9 | % | |||
Specific Volume | ASTM D792 | 0.7 | cm³/g | ||||
Density | ASTM D792 | 1.44 | g/cm³ | ||||
Density | ISO 1183 | 1.44 | g/cm³ | ||||
Melt Index | 250°C 5kg | ASTM D1238 | 24 | g/10min | |||
Melt Index | 250°C 5kg | ISO 1133 | 12 | cm³/10min | |||
Melt Index | 265°C 5kg | ISO 1133 | 19 | cm³/10min | |||
Electrical properties | Condition | Standard | Value | Unit | |||
Dielectric Constant | 1MHz | ASTM D150 | 4 | ||||
Dielectric Constant | 100Hz | ASTM D150 | 4 | ||||
Volume Resistivity | ASTM D257 | 4.8E+15 | Ω.cm | ||||
Dissipation Factor | 1MHz | ASTM D150 | 0.02 | ||||
Dissipation Factor | 100Hz | ASTM D150 | 0.003 | ||||
Hardness | Condition | Standard | Value | Unit | |||
Rockwell Hardness | R(Scale) | ASTM D785 | 109 | ||||
Flammability | Condition | Standard | Value | Unit | |||
Flame Rating | All Color 1.5mm | UL94 | HB | ||||
Flame Rating | All Color 3.0mm | UL94 | HB |
Looking for the full datasheet? Contact us for more technical information.
04 | Processing and Compatibility
The grade is designed for injection molding and shows a reasonable compromise between flow and strength. For high-volume production, this means fewer trade-offs between cycle time and part quality. Shrinkage is low, so parts stay closer to design dimensions. In mass production runs, the stability of this material reduces reject rates, which matters directly to cost control.
05 | Why it Stands Out
Compared with using PC or PBT on their own, XENOY™ 6370 brings together the ductility of PC, the chemical resistance of PBT, and the rigidity of glass fiber reinforcement.
Engineers also point out its adaptability: it performs in hot, cold, and humid conditions.
In many applications it can even replace metal or more expensive engineering plastics, bringing both weight reduction and cost savings.
This is one reason it is frequently specified in automotive lightweighting projects and in electrification components.
06 | FAQ
Q1: Can it be used outdoors?
It tolerates some outdoor conditions. However, for continuous exposure, UV-stabilized versions or protective coatings are recommended.
Q2: What advantage does it have over metal parts?
It is lighter, easier to process, and usually more economical—while still meeting structural requirements in many cases.
Q3: Is it suitable for electric vehicle parts?
Yes. Its insulation and heat stability make it a natural fit for battery brackets, connectors, and related modules.
07 | Why Work with Juyuan
For buyers, material quality is only half the story—supply security matters just as much. Juyuan has been active in the international plastics trade for 24 years and offers:
Verified sourcing – authentic materials from stable global channels.
Practical selection advice – recommendations shaped around customer industries, not just data sheets.
Efficient delivery – logistics networks covering multiple ports and warehouses to keep lead times short.
Long-term reliability – ongoing supply partnerships with customers in automotive, electronics, and industrial sectors.
Choosing Juyuan means working with a supplier that understands both the material and the buyer’s business context.
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