Filament (FDM)

ASA 3D printing

ASA has properties similar to ABS but withstands UV light and weather: it is the material for parts that work outdoors. We print it in Brescia with FDM, including carbon-fiber-filled and flame-retardant grades.

Price band

€€

3 variantsData checked on 13 November 2026

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What it is for

ASA is used for parts that stay outdoors: boxes and lids for sensors and antennas, mounts on vehicles and farm machinery, housings, brackets and components of outdoor installations. It keeps its color and properties under sun, rain and temperature swings, with mechanical and thermal resistance similar to ABS.

Do not choose it for high mechanical loads or for parts subject to wear: nylon is the better fit there. For parts that work in heat move to polycarbonate or PPS. Indoors, ABS does the same job.

Variants compared

Variant

ASA: properties of the variants from the makers' data sheets, one column per variant: ASA
Property	ASAQuote
Source	on request

ASA: properties of the variants from the makers' data sheets, one column per variant
Property	ASAQuote	ASA-CF (carbon fiber)Quote	ASA-FR (flame retardant)Quote
Mechanical
Tensile strength	on request	43.5 MPaISO 527, XY25 MPa Z	42 MPaASTM D638, at yield, orientation not stated, at 23 °C
Tensile modulus	on request	3,611.7 MPaISO 527, XY1,903.8 MPa Z	1,800 MPaASTM D638, at 23 °C
Elongation at break	on request	1.8%ISO 527, XY2.7% Z	35%ASTM D638, minimum value, at 23 °C
Flexural strength	on request	69.1 MPaISO 306, XY46.5 MPa Z	64 MPaASTM D790, at 23 °C
Flexural modulus	on request	3,265 MPaISO 178, XY1,743.4 MPa Z	1,900 MPaASTM D790, at 23 °C
Charpy impact, notchedISO 179, XY	on request	5.5 kJ/m²	on request
Charpy impact, unnotchedISO 179, XY	on request	11 kJ/m²11.9 kJ/m² Z	on request
Izod impact, notchedASTM D256, at 23 °C	on request	on request	435 J/m
Thermal
Heat deflection temperature (HDT) at 0.45 MPaISO 75	on request	103 °C	on request
Heat deflection temperature (HDT) at 1.8 MPa	on request	97.3 °CISO 75	86 °CASTM D648, specimen not annealed
Glass transition (Tg)DSC, 10 °C/min	on request	106.6 °C	on request
Vicat softening temperature	on request	110.8 °CISO 306	94 °CASTM D1525, 50 N, 50 °C/h
Physical
Densityat 23 °C	on request	1.09 g/cm³ISO 1183	1.08 g/cm³standard not stated on the sheet
Water absorptionequilibrium at 23 °C and 70% RH	on request	0.37%standard not stated on the sheet	on request
Fire behavior
Flammability rating	on request	HB at 1.5 mmUL 94	V-0 at 1.6 mmstandard not stated on the sheet, UL 94-equivalent test
Source	on request	Fiberon (Polymaker), Fiberon™ ASA-CF08, V1.0, PDFread on 13 November 2026	Spectrum Filaments, Spectrum FlameGuard ASA 275, Preparation date: 30-09-2024, PDFread on 13 November 2026

Typical values from the makers' data sheets, measured on specimens under the conditions stated. They are not guaranteed design values: for a critical application ask us for a test on your part.

Design limits

Build volume: 350 × 350 × 450 mm
Minimum wall: 3 mm
Dimensional tolerance: ±0.6 mm up to 100 mm, ±0.75% above

These are the limits of the process, the same for every variant unless stated. For critical dimensions, talk to us before printing.

Which variant to choose

ASA: the unfilled grade, for covers and outdoor parts in general. The values of its data sheet are on request.
ASA-CF (carbon fiber): stiffer and more dimensionally stable, but more brittle. On the sheet's printed specimens: tensile modulus 3611.7 MPa, tensile strength 43.5 MPa in XY and 25 MPa in Z, elongation at break 1.8% (ISO 527); heat deflection temperature 103 °C at 0.45 MPa (ISO 75).
ASA-FR (flame retardant): with a flame retardant, for outdoor electrical enclosures. The maker's data sheet reports V-0 at 1.6 mm in a test equivalent to UL 94 and a tensile strength at yield of 42 MPa (ASTM D638; the sheet does not say whether on printed specimens).

Data sheets

Fiberon (Polymaker), Fiberon™ ASA-CF08, V1.0, PDFread on 13 November 2026
Columns: ASA-CF (carbon fiber)
Spectrum Filaments, Spectrum FlameGuard ASA 275, Preparation date: 30-09-2024, PDFread on 13 November 2026
Columns: ASA-FR (flame retardant)

FAQ

Frequently asked questions

ASA is a polymer developed for outdoor use: compared with ABS it keeps its color and toughness better under UV light, rain and temperature swings. It is the material we suggest for parts exposed to the sun. Real service life depends on color, wall thickness and climate: for a critical application ask us for a test on your part.

For ASA-CF the data sheet reports a heat deflection temperature of 103 °C at 0.45 MPa and 97.3 °C at 1.8 MPa (ISO 75, printed specimens). For ASA-FR it reports 86 °C at 1.82 MPa (ASTM D648, unannealed specimen). For unfilled ASA the figure is on request.

Yes. ASA is one of the base materials in which we lay continuous carbon fiber: ASA gives the weather resistance, the fiber carries the load along the chosen paths. The properties of the reinforced part depend on how much fiber it holds and how it is oriented, and are assessed part by part.

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