DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid vs. Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45)
DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) and Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45) (Vectorply Corporation) achieve a 97.3% ASTM engineering compatibility score in E-Glass / E-CR Stitched Multiaxials (1708 / 1808) & Kevlar Hybrids. Tensile strength delta is +60 MPa (+4.2%) and thermal HDT delta is matched, making them qualified for direct drop-in substitution under standard cure schedules.
Side-by-Side ASTM Mechanical, Thermal, Rheological & Pricing Delta
| ASTM Parameter | A: DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) | B: Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45) (Vectorply Corporation) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | DuPont / Hexcel • DUP-KEV49-285 | Vectorply Corporation • VEC-KBX1200-50 | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 1480 MPa (214,656 psi) | 1420 MPa (205,954 psi) | +60 MPa (+4.2 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | N/A | N/A | Ambient / N/A |
| ASTM D790 Flexural Strength (MPa) | 990 MPa | 980 MPa | +10 MPa (+1 %) |
| ASTM D2583 Barcol Hardness | N/A | N/A | N/A |
| ASTM D2196 Brookfield Viscosity @ 25°C | Solid Reinforcement / Core | Solid Reinforcement / Core | Solid State |
| Gel Time @ 25°C (Minutes) | N/A | N/A | N/A |
| ASTM D792 Specific Density (kg/m³) | 2560 kg/m³ | 2560 kg/m³ | 0 kg/m³ |
| US DOT 49 CFR & TDG Hazmat Class | Non-Regulated Industrial Fiber (N/A) | Non-Regulated Industrial Fiber (N/A) | Identical (N/A) |
| Unit Price ($/kg USD) & Pack Price | $46/kg • $4,600 (100 kg Roll (50 in)) | $42.5/kg • $4,250 (100 kg Roll (50 in)) | +3.5 $/kg (+8.2 %) |
| US Stocking Warehouses | Phenix City, AL • Tampa, FL • Minneapolis, MN | Phenix City, AL • Tampa, FL • Minneapolis, MN | 1–3 Days LTL Dispatch |
Companion process stack: Marine Vinyl Ester Resin (~0.68 kg/m² per ply in VIP) + Norox MEKP-925H Catalyst (1.5%). Follow RESIN DEMAND FORMULA: 1708 Biaxial (25.5 oz/yd² total) absorbs ~0.95 kg of Vinyl Ester resin per m² per ply in hand layup, or ~0.68 kg/m² per ply under vacuum infusion.
Direct Drop-In Qualified: Thermal deflection (ASTM D648 HDT) differs by only 0 °C (N/A °C vs. N/A °C). Existing mold cure and demold cycles can be maintained without thermal schedule modification.
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Non-Regulated Industrial Fiber (UN Number: N/A). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105).
Engineering FAQ: DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid vs. Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45)
1. Is DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid a direct drop-in equivalent for Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45)?▼
DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) and Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45) (Vectorply Corporation) achieve a 97.3% ASTM engineering compatibility score in E-Glass / E-CR Stitched Multiaxials (1708 / 1808) & Kevlar Hybrids. Tensile strength delta is +60 MPa (+4.2%) and thermal HDT delta is matched, making them qualified for direct drop-in substitution under standard cure schedules.
2. What is the ASTM D638 Tensile Strength and ASTM D648 HDT difference between DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid and Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45)?▼
DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) delivers ASTM D638 Tensile Strength of 1480 MPa (214,656 psi) and ASTM D648 HDT of N/A °C, whereas Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45) (Vectorply Corporation) delivers 1420 MPa (205,954 psi) and HDT of N/A °C. The net delta is +60 MPa (+4.2 %) tensile and N/A HDT.
3. Do DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid and Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45) use the same catalyst or hardener cure system?▼
Companion process stack: Marine Vinyl Ester Resin (~0.68 kg/m² per ply in VIP) + Norox MEKP-925H Catalyst (1.5%). Follow RESIN DEMAND FORMULA: 1708 Biaxial (25.5 oz/yd² total) absorbs ~0.95 kg of Vinyl Ester resin per m² per ply in hand layup, or ~0.68 kg/m² per ply under vacuum infusion. Direct Drop-In Qualified: Thermal deflection (ASTM D648 HDT) differs by only 0 °C (N/A °C vs. N/A °C). Existing mold cure and demold cycles can be maintained without thermal schedule modification.
4. How do US DOT 49 CFR Hazmat shipping rules and B2B drum/pack prices compare between DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid and Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45)?▼
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Non-Regulated Industrial Fiber (UN Number: N/A). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105). In US B2B distribution, DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid is priced at $4,600 per 100 kg Roll (50 in) ($46/kg) vs. $4,250 per 100 kg Roll (50 in) ($42.5/kg) for Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45) (delta: +3.5 USD/kg).
Related Drop-In Comparisons in E-Glass / E-CR Stitched Multiaxials (1708 / 1808) & Kevlar Hybrids
DuPont Kevlar 49 Style 285 4HS Crowfoot Ballistic Aramid (DuPont / Hexcel) and Vectorply K-BX 1200 DuPont Kevlar 49 Stitched Biaxial (+/-45) (Vectorply Corporation) are trademarks of their respective owners. CompositeMatrix Technologies Inc. is an independent North American B2B composite material intelligence registry; comparative ASTM D638, D648, D790, D2583, and D2196 figures are presented under the US legal doctrine of Nominative Fair Use (Lanham Act, 15 U.S.C. § 1125) and Feist Publications, Inc. v. Rural Telephone Service Co. (499 U.S. 340) for scientific and industrial cross-reference. Cure schedules, exotherm behavior, and laminate qualification must be verified by a licensed Naval Architect or Professional Engineer (PE) against current manufacturer batch Technical Data Sheets (TDS) and Safety Data Sheets (SDS).