Technical datasheet

STYRON™ 498

Supplied byAmSty- Last Updated on Jan 8, 2026

STYRON™ 498 by AmSty is a high impact polystyrene (HIPS) grade. Offers toughness, gloss, excellent dimensional stability, good stiffness, flow, cost and processing ability. Provides better color consistency, the ability to down-gauge and improved wall thickness distribution. Applications include food packaging, cups, lids, appliances, housewares, medical and consumer electronics. STYRON™ 498 is an FDA 21 CFR 177.1640 and UL 94 HB E326906 compliant grade.
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Benefits

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Compliance

Food Contact Approval
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Certifications & Compliance
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Availability

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STYRON™ 498 properties

Mechanical properties

PropertiesValue & unitTest conditionTest method
Flexural Modulus0.0 Visible After LoginVisible After LoginVisible After Login
Flexural Strength0.0 Visible After LoginVisible After LoginVisible After Login
Hardness, Rockwell R0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Izod0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, 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
Tensile Rupture0.0 Visible After LoginVisible After LoginVisible After Login
Tensile Strength0.0 Visible After LoginVisible After LoginVisible After Login

Physical properties

PropertiesValue & unitTest conditionTest method
Linear Mold Shrinkage0.0 Visible After LoginVisible After LoginVisible After Login
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)0.0 Visible After LoginVisible After LoginVisible After Login
Specific Gravity0.0 Visible After LoginVisible After LoginVisible After Login

Thermal properties

PropertiesValue & unitTest conditionTest method
CTE, Linear0.0 Visible After LoginVisible After LoginVisible After Login
Heat Deflection Temperature (HDT)0.0 Visible After LoginVisible After LoginVisible After Login
Heat Deflection Temperature (HDT)0.0 Visible After LoginVisible After LoginVisible After Login
Vicat Softening Temperature0.0 Visible After LoginVisible After LoginVisible After Login

STYRON™ 498 Processing Guidelines

Extrusion Processing Guidelines

PropertiesValue & unitTest conditionTest method
Cylinder Zone 1 TemperatureVisible After LoginVisible After Login
Cylinder Zone 2 TemperatureVisible After LoginVisible After Login
Cylinder Zone 3 TemperatureVisible After LoginVisible After Login

Injection Processing Guidelines

PropertiesValue & unitTest conditionTest method
Nozzle Zone 1 TemperatureVisible After LoginVisible After Login
Nozzle Zone 2 TemperatureVisible After LoginVisible After Login

Injection Molding Processing Guidelines

PropertiesValue & unitTest conditionTest method
Back PressureVisible After LoginVisible After Login
Nozzle Zone 3 TemperatureVisible After LoginVisible After Login
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