Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg vs. Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg
Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg (Hexcel Corporation) and Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg (Syensqo / Solvay Composite Materials) achieve a 96.7% ASTM engineering compatibility score in Carbon Fiber Fabrics (3K / 6K / 12K), Spread-Tow & Prepregs. Tensile strength delta is +160 MPa (+5.9%) 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: Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg (Hexcel Corporation) | B: Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg (Syensqo / Solvay Composite Materials) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | Hexcel Corporation • HXL-M21-IMA | Syensqo / Solvay Composite Materials • SLV-CYC977-2 | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 2850 MPa (413,358 psi) | 2690 MPa (390,152 psi) | +160 MPa (+5.9 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | N/A | N/A | Ambient / N/A |
| ASTM D790 Flexural Strength (MPa) | 1820 MPa | 1760 MPa | +60 MPa (+3.4 %) |
| 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) | 1790 kg/m³ | 1790 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 | $142/kg • $6,390 (100 yd Roll (45 kg)) | $136/kg • $6,120 (100 yd Roll (45 kg)) | +6 $/kg (+4.4 %) |
| US Stocking Warehouses | Tacoma, WA • Stamford, CT • Anderson, SC | Tacoma, WA • Stamford, CT • Anderson, SC | 1–3 Days LTL Dispatch |
Companion process stack: Low-Viscosity Infusion Epoxy (Gurit Prime 37 / Hexion RIMR 135 / Araldite LY 1564) + Stoichiometric Amine Hardener. Follow SIZE COMPATIBILITY: Use Epoxy-compatible silane sizing with Structural Epoxy Resins (approx. 55:45 fiber-to-resin weight ratio in vacuum infusion). ITAR/EAR export screening applies.
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: Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg vs. Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg
1. Is Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg a direct drop-in equivalent for Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg?▼
Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg (Hexcel Corporation) and Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg (Syensqo / Solvay Composite Materials) achieve a 96.7% ASTM engineering compatibility score in Carbon Fiber Fabrics (3K / 6K / 12K), Spread-Tow & Prepregs. Tensile strength delta is +160 MPa (+5.9%) 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 Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg and Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg?▼
Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg (Hexcel Corporation) delivers ASTM D638 Tensile Strength of 2850 MPa (413,358 psi) and ASTM D648 HDT of N/A °C, whereas Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg (Syensqo / Solvay Composite Materials) delivers 2690 MPa (390,152 psi) and HDT of N/A °C. The net delta is +160 MPa (+5.9 %) tensile and N/A HDT.
3. Do Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg and Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg use the same catalyst or hardener cure system?▼
Companion process stack: Low-Viscosity Infusion Epoxy (Gurit Prime 37 / Hexion RIMR 135 / Araldite LY 1564) + Stoichiometric Amine Hardener. Follow SIZE COMPATIBILITY: Use Epoxy-compatible silane sizing with Structural Epoxy Resins (approx. 55:45 fiber-to-resin weight ratio in vacuum infusion). ITAR/EAR export screening applies. 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 Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg and Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg?▼
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, Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg is priced at $6,390 per 100 yd Roll (45 kg) ($142/kg) vs. $6,120 per 100 yd Roll (45 kg) ($136/kg) for Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg (delta: +6 USD/kg).
Related Drop-In Comparisons in Carbon Fiber Fabrics (3K / 6K / 12K), Spread-Tow & Prepregs
Hexcel HexPly M21 Primary Structure Aerospace Carbon Prepreg (Hexcel Corporation) and Solvay Cycom 977-2 Toughened Aerospace Carbon Epoxy Prepreg (Syensqo / Solvay Composite Materials) 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).