# Acrylic (PMMA)

> The optical plastic: 92% light transmission, scratch-resistant, polishes to a glass-clear finish.

- Category: Engineering Plastics → commodity
- HTML page: https://fabvector.com/materials/acrylic-pmma (Portuguese: https://fabvector.com/pt/materials/acrylic-pmma)
- Price index: $ (1–5, 6061-T6 = $)

## Mechanical properties (typical values, not certified minimums)

| Property | Value |
|---|---|
| Tensile strength | 70 MPa |
| Yield strength | ~70 MPa |
| Hardness | M93 (Rockwell) |
| Density | 1.19 g/cm³ |
| Machinability | ★★★☆☆ (3/5) |
| Corrosion resistance | ★★☆☆☆ (2/5) |

## When to choose it

Optics and appearance govern: PMMA transmits 92% of light (vs 88% for PC), resists scratching far better, and machine- or flame-polishes to true transparency at lower cost.

## When to look elsewhere

The part can be struck or dropped: PMMA is brittle and shatters where polycarbonate bends. For guards and impact covers, machine PC and accept the polishing premium.

## Typical applications

- Optical viewports and instrument windows
- Light pipes and laser-path components
- Display stands and demonstration covers
- Microfluidic and lab device prototypes

## Compatible surface finishes

- [As-Machined](https://fabvector.com/md/finishes/as-machined)
- [Polishing](https://fabvector.com/md/finishes/polishing)
- [Silk Screening](https://fabvector.com/md/finishes/silk-screening)
- [Laser Marking](https://fabvector.com/md/finishes/laser-marking)

Industries: optics-photonics, consumer-electronics, research, medical-devices · Instant quote: https://fabvector.com/quote