Technical datasheet

ULTRALLOY™ 304

Supplied byHapco- Last Updated on Mar 9, 2026

ULTRALLOY™ 304 by Hapco is a flame retardant (UL94 V-O), liquid molding polyurethane casting resin. It is available as 100:107 solution by volume A:B and 100:100 solution by weight A:B. Designed for cast prototypes, production parts, aftermarket parts and medical devices. Complies with RoHS Directive (EU) 2011/65. ULTRALLOY™ 304 has a shelf life of 6 months.
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ULTRALLOY™ 304 properties

Flammability properties

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Flame Rating, UL 940.0 Visible After LoginVisible After LoginVisible After Login

Mechanical properties

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Flexural Modulus0.0 Visible After LoginVisible After LoginVisible After Login
Flexural Strength0.0 Visible After LoginVisible After LoginVisible After Login
Hardness, Shore D0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Notched Izod0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Unnotched Izod0.0 Visible After LoginVisible After LoginVisible After Login
Modulus of Elasticity0.0 Visible After LoginVisible After LoginVisible After Login
Tensile Elongation0.0 Visible After LoginVisible After LoginVisible After Login
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Other properties

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Viscosity0.0 Visible After LoginVisible After LoginVisible After Login

Physical properties

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Demold Time0.0 Visible After LoginVisible After LoginVisible After Login
Gel Time0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage0.0 Visible After LoginVisible After LoginVisible After Login
Specific Gravity0.0 Visible After LoginVisible After LoginVisible After Login
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Thermal properties

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Heat Deflection Temperature (HDT)0.0 Visible After LoginVisible After LoginVisible After Login

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