描述
VESTAMID X7293 BK 9.7507 is a high-viscosity, plasticized, impact-modified, heat- and light-stabilized polyamide 12 compound from Evonik Operations GmbH developed for flexible automotive tubing and hose extrusion.
The grade is specifically positioned for automotive fluid-line applications and is referenced against DIN 73378, ISO/DIN 7628-1 and SAE J844. Evonik identifies the material as PA12-HIPHL Type 1 under DIN 73378 and PA12-HIPEHL Type 1 under ISO/DIN 7628-1.
These classifications are important because they describe more than the polymer family. They indicate a PA12 formulation engineered around high impact strength, plasticization, heat stabilization and light stabilization for tubing service.
VESTAMID X7293 BK 9.7507 is designed for easy extrusion while retaining excellent impact performance at low temperature. This balance makes it particularly useful for flexible tubes that must withstand vehicle vibration, installation bending, stone impact, winter temperatures and repeated pressure cycles.
The PA12 base resin also provides low moisture absorption. Current grade-specific data lists approximately 1.3% water absorption and 0.5% humidity absorption. Because PA12 absorbs much less moisture than shorter-chain nylons, dimensions and mechanical properties change relatively little as ambient humidity varies.
The material is black, unfilled and supplied with lubricant, plasticizer, impact modifier, heat stabilizer and light stabilizer. It is supplied as cylindrical granules in moisture-proof packaging and has a shelf life of at least two years in original undamaged packaging stored dry at temperatures not exceeding 30°C.
A key strength of VESTAMID X7293 BK 9.7507 is its unusually ductile mechanical behavior. Current dry data shows a tensile modulus of about 410 MPa, yield stress of about 26 MPa, stress at break of about 42 MPa and nominal strain at break of approximately 240%.
Conditioned values remain very similar, with approximately 400 MPa tensile modulus, 24 MPa yield stress, 40 MPa stress at break and around 250% nominal strain at break. This confirms that the material remains flexible and mechanically stable after conditioning.
Impact behavior is particularly strong. Unnotched Charpy specimens show no break at 23°C, 0°C and -30°C. This is one of the most valuable characteristics for automotive tubing exposed to winter conditions.
Evonik’s current fuel-line literature also identifies X7293 as a proven PA12 grade in automotive diesel and fluid-line systems. The broader VESTAMID PA12 platform is widely used because of its resistance to fuels, oils, hydraulic fluids, greases, salt solutions and many solvents.
For more PA12 materials, visit our PA12 Polyamide 12 Product Category →.
For official automotive tubing information, see the Evonik VESTAMID Automotive Fuel Tubing Guide →.
Key Features of VESTAMID X7293 BK 9.7507
| Feature | Engineering Benefit |
|---|---|
| High Viscosity | Supports stable tube and hose extrusion |
| Plasticized PA12 | Provides flexibility for routing and installation |
| Impact Modified | Improves resistance to shock and low-temperature damage |
| Heat Stabilized | Supports automotive under-hood and fluid-line service |
| Light Stabilized | Improves stability during light exposure |
| Excellent Low-Temperature Impact | Unnotched Charpy shows no break down to -30°C |
| Low Moisture Absorption | Helps preserve dimensions and properties with humidity changes |
| Oil / Fuel Resistance | Important for automotive fluid and fuel lines |
| Low Coefficient of Friction | Helps routing, assembly and dynamic contact behavior |
| General Chemical Resistance | Supports exposure to automotive fluids |
| DIN / ISO / SAE Positioning | Designed around recognized automotive tubing standards |
| Easy Processing | Evonik specifically highlights practical extrusion behavior |
The central advantage of VESTAMID X7293 BK 9.7507 is the combination of flexibility, cold-impact toughness and automotive-fluid resistance.
Typical Applications for VESTAMID X7293 BK 9.7507
VESTAMID X7293 BK 9.7507 is primarily intended for flexible tubing and hose systems.
| Application Area | Typical Use |
|---|---|
| Automotive Flexible Tubing | General fluid and pneumatic lines |
| Diesel Fuel Lines | Flexible PA12 tubing for diesel systems |
| Return Lines | Low-pressure automotive fuel-return circuits |
| Pneumatic Brake Tubing | Applications designed around SAE J844 or related specifications |
| Air Lines | Flexible pneumatic tubing in vehicles |
| SCR / AdBlue Lines | Selected SCR fluid-line applications after system qualification |
| Oil & Lubricant Lines | Tubing exposed to automotive oils and lubricants |
| Industrial Flexible Hose | Chemical-resistant PA12 hose and tubing |
| Profile Extrusion | Flexible extruded technical profiles |
Evonik has also identified X7293 in historical SCR / AdBlue line development. In such applications, actual system qualification should include fluid compatibility, pressure, temperature, freeze-thaw behavior and tube geometry.
Typical Properties of VESTAMID X7293 BK 9.7507
Physical & Rheological Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 1.02 g/cm³ | ISO 1183 |
| Water Absorption | 1.3% | Similar to ISO 62 |
| Humidity Absorption | 0.5% | Similar to ISO 62 |
| MVR | 53 cm³/10 min | ISO 1133 |
| MVR Condition | 275°C / 5 kg | ISO 1133 |
| Molding Shrinkage – Parallel | 0.9% | ISO 294-4 / 2577 |
| Molding Shrinkage – Normal | 1.2% | ISO 294-4 / 2577 |
| Structure | Semi-crystalline | Manufacturer information |
| Color | Black | Manufacturer information |
MVR must always be quoted together with its test condition. The 53 cm³/10 min value at 275°C / 5 kg should not be compared directly with another grade measured at a different temperature or load.
Mechanical Properties
| Property | Dry / Conditioned | Test Method |
|---|---|---|
| Tensile Modulus | 410 / 400 MPa | ISO 527 |
| Tensile Strength | 26 / 24 MPa | ISO 527 |
| Yield Stress | 26 / 24 MPa | ISO 527 |
| Yield Strain | 32 / 32% | ISO 527 |
| Stress at 50% Strain | 26 / 24 MPa | ISO 527 |
| Stress at Break | 42 / 40 MPa | ISO 527 |
| Nominal Strain at Break | 240 / 250% | ISO 527 |
| Charpy Impact, 23°C | No Break / No Break | ISO 179/1eU |
| Charpy Impact, 0°C | No Break / No Break | ISO 179/1eU |
| Charpy Impact, -30°C | No Break / No Break | ISO 179/1eU |
| Charpy Notched Impact, 23°C | Approx. 120 / 125 kJ/m² | ISO 179/1eA |
| Charpy Notched Impact, -30°C | Approx. 7 / 6 kJ/m² | ISO 179/1eA |
| Flexural Modulus, 23°C | Approx. 400 / 390 MPa | ISO 178 |
| Flexural Strength, 23°C | Approx. 21 / 21 MPa | ISO 178 |
The high elongation and no-break unnotched impact results are central to the flexible-tubing positioning of VESTAMID X7293 BK 9.7507.
Thermal Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Melting Temperature | 172°C | ISO 11357-1/-3 |
| Glass Transition Temperature | 13°C | ISO 11357-1/-2 |
| HDT @ 1.80 MPa | 45°C | ISO 75-1/-2 |
| HDT @ 0.45 MPa | 100°C | ISO 75-1/-2 |
| Vicat Softening Temperature A | 165°C | ISO 306 |
| Vicat Softening Temperature B | 130°C | ISO 306 |
| Flammability @ 1.6 / 3.2 mm | HB | IEC 60695-11-10 |
The relatively low glass-transition temperature reflects the plasticized nature of the grade and helps explain its flexibility and cold-temperature toughness.
Electrical Properties
| Property | Dry / Conditioned | Test Method |
|---|---|---|
| Relative Permittivity, 100 Hz | 11 / 12 | IEC 62631-2-1 |
| Relative Permittivity, 1 MHz | 4.6 / 3.7 | IEC 62631-2-1 |
| Volume Resistivity | 1 × 10¹⁰ / 2.7 × 10⁹ Ω·m | IEC 62631-3-1 |
| Dielectric Strength | Conditioned approx. 37 kV/mm | IEC 60243-1 |
| Comparative Tracking Index | 600 | IEC 60112 |
| Insulation Group | I | DIN EN 60664-1 |
Electrical values are secondary to the automotive-tubing positioning but may be useful in system design.
Chemical Resistance
Current grade-specific data lists resistance testing against a broad range of media, including:
- Motor oil SAE 10W40
- Insulating oil
- ISO 1817 reference fuels
- Alcohol-containing fuels
- Diesel fuel
- Diesel EN 590
- Methanol
- Ethanol
- Iso-octane
- n-Hexane
- Toluene
- Sodium chloride solution
- DOT 4 brake fluid
- Water
Final application approval should still be based on actual fluid composition, temperature, pressure and exposure time.
Why Choose VESTAMID X7293 BK 9.7507?
The main reason to choose VESTAMID X7293 BK 9.7507 is its balance of flexibility, low-temperature impact resistance and automotive chemical resistance.
Automotive tubing must survive much more than simple fluid exposure. A tube is bent during assembly, clipped to the vehicle body, exposed to vibration and repeatedly pressurized during service.
At low temperature, many polymers become stiffer and more brittle. VESTAMID X7293 BK 9.7507 is specifically impact modified and plasticized to preserve toughness under these conditions.
The no-break unnotched Charpy behavior down to -30°C supports cold-weather tube handling and service.
Its strain at break around 240–250% also shows that the material can deform substantially before rupture.
PA12’s low moisture sensitivity is another important advantage. Brake, air and fuel-line dimensions need to remain predictable. Higher-moisture nylons can experience larger dimensional and mechanical shifts as humidity changes, while PA12 changes much less.
Fuel and oil resistance is equally important. The grade is tested against multiple ISO reference fuels, diesel, motor oil and other common automotive media.
The black heat- and light-stabilized formulation also supports long-term technical use.
For customers requiring a proven PA12-HIPHL / PA12-HIPEHL Type 1 flexible tubing compound, VESTAMID X7293 BK 9.7507 is a highly application-specific choice.
Processing Guidelines for VESTAMID X7293 BK 9.7507
VESTAMID X7293 BK 9.7507 is designed primarily for:
- Pipe / tube extrusion
- Profile extrusion
- Other extrusion
- Injection molding
Current grade-specific ISO test-specimen conditions are:
| Processing Parameter | Published Value |
|---|---|
| ISO Test Melt Temperature | 220°C |
| ISO Test Mold Temperature | 60°C |
| ISO Test Injection Velocity | 200 mm/s |
| ISO Test Holding Pressure | 70 MPa |
These are standardized test-specimen conditions and should not be treated as the complete tube-extrusion recipe.
Current public X7293 family calculation data lists a general melt range of approximately 200–240°C and mold-temperature range of approximately 30–100°C. For production extrusion, the exact barrel profile should be optimized for tube diameter, wall thickness, line speed and die design.
For tube extrusion, control:
- Feed-zone temperature
- Compression-zone temperature
- Metering-zone temperature
- Adapter and die temperature
- Screw speed
- Melt pressure
- Line speed
- Tube outside diameter
- Wall thickness
- Draw-down
- Vacuum sizing
- Cooling-water temperature
- Ovality
- Surface quality
Material from intact moisture-proof packaging is supplied ready for processing. If packaging has been damaged or granules have absorbed moisture, follow the latest Evonik PA12 drying recommendations before extrusion.
VESTAMID X7293 BK 9.7507 vs. VESTAMID X7393 BK 9.7507
| Feature | VESTAMID X7293 BK 9.7507 | VESTAMID X7393 BK 9.7507 |
|---|---|---|
| Base Polymer | Plasticized impact-modified PA12 | Plasticized impact-modified PA12 |
| Color | Black | Black |
| Viscosity | High | High |
| Primary Application | Flexible tubing and hose | Semi-rigid tubing with increased burst-pressure resistance |
| Tensile Modulus | Approx. 410 MPa | Approx. 560 MPa |
| Nominal Strain at Break | Approx. 240% | >50% dry / around 200% conditioned |
| MVR | 53 cm³/10 min @275°C/5 kg | 8 cm³/10 min @230°C/5 kg |
| Low-Temperature Impact | Excellent | Optimized for cold impact |
| Main Standards | DIN 73378, ISO/DIN 7628-1, SAE J844 | DIN 73378 / DIN 74324 family positioning |
| Main Selection Reason | More flexible tubing behavior | Higher stiffness and burst-pressure resistance |
The MVR values above are measured at different temperatures, so they must not be used as a direct numerical flow comparison.
Choose VESTAMID X7293 BK 9.7507 when the application prioritizes flexible tubing, high elongation and automotive fluid-line compliance.
Choose VESTAMID X7393 BK 9.7507 when the tube design requires more semi-rigid behavior and increased burst-pressure resistance.
Related Products
VESTAMID X7393 BK 9.7507 – High-viscosity plasticized impact-modified PA12 for semi-rigid automotive tubing with higher burst-pressure resistance.
VESTAMID X7297 BK 9.7507 – High-viscosity plasticized impact-modified PA12 for flexible automotive tubing and hose.
VESTAMID LX9013 BK 9.7507 – Plasticized impact-modified PA12 for demanding diesel/common-rail tubing applications.
View More PA12 Polyamide 12 Materials →
Technical Documents for VESTAMID X7293 BK 9.7507
| Document Type | Description |
|---|---|
| TDS | Current physical, mechanical, thermal, electrical and rheological data |
| SDS | Safety Data Sheet |
| Automotive Fuel Tubing Guide | Evonik diesel and multilayer fuel-line information |
| Processing Guide | PA12 extrusion, drying and molding recommendations |
| COA | Batch-specific quality information where available |
| Compliance Information | DIN 73378, ISO/DIN 7628-1 and SAE J844 application context |
Need technical documents for VESTAMID X7293 BK 9.7507?
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FAQ About VESTAMID X7293 BK 9.7507
Q1: What is VESTAMID X7293 BK 9.7507?
VESTAMID X7293 BK 9.7507 is a high-viscosity, plasticized, impact-modified, heat- and light-stabilized PA12 from Evonik for flexible automotive tubing and hose extrusion.
Q2: Is VESTAMID X7293 BK 9.7507 a plasticized grade?
Yes. Plasticizer is explicitly listed in the current grade-specific product information.
Q3: What automotive standards are associated with the grade?
Evonik identifies the grade for DIN 73378 PA12-HIPHL Type 1, ISO/DIN 7628-1 PA12-HIPEHL Type 1 and SAE J844 applications.
Q4: What is the density?
The typical density is approximately 1.02 g/cm³.
Q5: What is the tensile modulus?
The current tensile modulus is approximately 410 MPa dry and 400 MPa conditioned.
Q6: How flexible is VESTAMID X7293 BK 9.7507?
Nominal strain at break is approximately 240% dry and 250% conditioned, confirming the highly ductile character of the material.
Q7: How does the material perform at low temperature?
Unnotched Charpy specimens show no break at 23°C, 0°C and -30°C. This is one of the main advantages of the grade.
Q8: Is VESTAMID X7293 BK 9.7507 resistant to diesel and automotive fluids?
Yes. Current grade data includes resistance testing against diesel, ISO reference fuels, alcohol-containing fuels, motor oil, brake fluid and other automotive media.
Q9: What is the MVR?
The current grade-specific MVR is approximately 53 cm³/10 min at 275°C / 5 kg. Always retain the test condition when comparing flow data.
Q10: What is the difference between VESTAMID X7293 BK 9.7507 and X7393 BK 9.7507?
X7293 is positioned for more flexible tubing and hose, while X7393 is more semi-rigid and designed for higher burst-pressure resistance. Their MVR values use different test temperatures and cannot be compared directly.
Request VESTAMID X7293 BK 9.7507 Price & Technical Support
For pricing, availability, technical documents or application support for VESTAMID X7293 BK 9.7507, please provide:
- Required quantity
- Destination country or port
- Tube or hose application
- Fuel, air, brake, oil or SCR medium
- Tube outside diameter
- Wall thickness
- Minimum bend radius
- Continuous and peak operating temperature
- Minimum cold-impact temperature
- Working and burst pressure
- DIN / ISO / SAE requirement
- Extrusion-line information
- TDS, SDS or COA requirement
- Sample requirement, if applicable
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