ABS vs Polycarbonate (PC): The Complete Comparison for Engineers and Buyers

ABS vs polycarbonate in one sentence: polycarbonate is up to 4× more impact-resistant, survives 30 °C higher temperatures, and can be transparent — but costs about twice as much and is harder to process. Choose ABS for indoor housings and cost-driven parts; choose PC when impact, heat, or clarity is non-negotiable; choose a PC-ABS blend when you need most of PC’s toughness at closer to ABS’s price.

Both are amorphous engineering thermoplastics, both injection mold beautifully, and both appear in the same product categories — which is exactly why this is the most-asked material shortlist in plastics. Manufyn molds and machines both materials in-house via plastic injection molding, CNC, and 3D printing — this comparison is written from production experience, not datasheets alone. Free DFM review on every quote.

ABS vs PC at a Glance

Ten criteria, one winner per row. Score it and PC wins on performance, ABS wins on cost and processability — the rest of this page explains when each of those wins actually matters for your part.

ABS vs Polycarbonate Comparison Table

What Is the Difference Between ABS and Polycarbonate?

The difference starts in the polymer chain. ABS is a terpolymer of three monomers — acrylonitrile for chemical resistance, butadiene rubber for impact, styrene for stiffness and gloss — blended in adjustable ratios (full breakdown in the ABS material guide).

Polycarbonate is a single polymer built from bisphenol-A units joined by carbonate linkages. Its bulky aromatic rings keep it amorphous and transparent; its flexible carbonate links absorb enormous impact energy (full breakdown in the polycarbonate material guide).

Practical consequence: ABS gets its toughness from dispersed rubber particles — effective, but temperature-limited, and the styrene matrix scatters light (opaque). PC gets its toughness from the backbone itself — so it stays tough at temperatures that soften ABS, and stays clear.

Is Polycarbonate Stronger Than ABS?

Yes — on every strength metric. Polycarbonate’s notched Izod impact of 600–850 J/m (per ASTM D256) is roughly 2–4× ABS’s 200–400 J/m depending on the grades compared, and its 55–75 MPa tensile strength beats ABS’s 40–50 MPa. A PC housing survives drops, impacts, and abuse that crack an identical ABS housing.

The engineering caveat: PC is notch-sensitive. A sharp internal corner or a deep scratch can cut its effective impact strength by an order of magnitude — a badly designed PC part can fail where a well-designed ABS part survives. That is a design problem, not a material ranking change: radius every internal corner at ≥ 0.5× wall thickness and PC keeps its full advantage.

Which Handles Heat Better, ABS or Polycarbonate?

Polycarbonate, decisively. PC’s glass transition temperature is ~147 °C against ABS’s ~105 °C, translating to continuous service limits of roughly 115–120 °C for PC versus 80–85 °C for ABS. In practice: parts near motors, lighting, under-hood zones, steam, or sterilization cycles need PC (or PC-ABS at minimum). Parts at room temperature or modest warmth are fully served by ABS.

Neither has a true melting point — both are amorphous, processed at 200–250 °C (ABS) and 280–320 °C (PC).

Which Costs More: ABS or Polycarbonate?

Polycarbonate — at every layer. PC resin runs about twice the price of ABS, its hotter, drying-critical processing adds 10–25%, and optical parts add tooling polish and hard-coating steps. A finished PC part typically lands 1.5–2.5× its ABS equivalent.

ABS vs PC Cost Breakdown

From Manufyn’s Quote Log: Real Part Price Deltas

Datasheets tell you resin price; only a manufacturer can tell you part price. Three recent (anonymised) parts quoted in both materials at our Pune facility:

The decision rule: pay the PC premium only when a failure mode (impact, heat, clarity) demands it. Full part-cost logic is in the injection molding vs 3D printing cost guide and the plastic injection parts guide.

Manufacturing: How ABS and PC Differ in Molding, Machining, and Printing

Injection Molding

ABS is one of the easiest materials to mold: forgiving window, 0.4–0.7% shrinkage, textures reproduce crisply. PC demands more — 280–320 °C melts, hot tools, and resin dried below 0.02% moisture or parts turn brittle; the reward is water-clear, dimensionally stable parts at 0.5–0.7% shrinkage. Process fundamentals in the injection molding design guide and wall thickness rules.

CNC Machining

Both machine cleanly with sharp tooling. The differences: PC can be polished back to optical clarity (ABS cannot), and PC needs annealing plus coolant-compatibility checks to avoid stress cracking. Feeds and speeds in the CNC machining plastics guide.

3D Printing (FDM)

ABS prints on any enclosed printer with a heated bed (230–250 °C) and vapor-smooths with acetone. PC needs a genuinely high-temperature machine (280–310 °C nozzle, heated chamber) — but printed PC survives load and heat tests that ABS prints fail. Technology selection in Manufyn’s 3D printing guides; prototypes in either material via the rapid prototyping service in 5–10 days.

When to Choose ABS

• Indoor enclosures, housings, covers with no heat or extreme-impact exposure
• Cost-driven consumer products and high-volume parts where 2× material price compounds
• Parts needing plating, painting, or gluing — ABS plating grade is the chrome-trim standard
• Easy prototyping — any FDM printer, quick mold trials, fast iteration

Reference project: precision injection molded building blocks held to toy-industry interlock tolerances in ABS.

When to Choose Polycarbonate

• Anything that must be transparent AND tough — lenses, guards, sight glasses, light guides
• Service above 85 °C: near motors, lighting, sterilization, under-hood
• Safety-critical impact: premium helmet shells, machine guards, protective covers
• Electrical enclosures needing UL94 V-0 with high heat margin

Reference project: a global medical startup’s injection molded assembly validated in record time — the certification-grade context where PC families dominate.

The Middle Path: PC-ABS Blends

When the shortlist genuinely deadlocks, the answer is often neither — it’s PC-ABS. Blending the two gives roughly 80% of PC’s impact strength and a heat ceiling of 110–125 °C, while keeping ABS-like molding ease and a price between the two. It is the default for laptop and phone housings, automotive interior structural trim, and power-tool bodies.

ABS vs Polycarbonate in Real Decisions: Luggage, Helmets, Enclosures, Automotive

Luggage

The most-searched version of this comparison. Polycarbonate shells flex and rebound from impacts that crack ABS shells, at 15–25% higher price — which is why premium luggage is PC and budget luggage is ABS. Marketing muddies this: many “polycarbonate” cases are actually ABS-PC blends or ABS with a PC film. The honest rule: for frequent flyers and checked bags, PC earns its premium; for occasional travel, quality ABS is fine.

Helmets

Both pass certification (DOT, ECE, ISI) — the standard, not the material, guarantees minimum safety. PC shells achieve the same impact rating thinner and lighter, and resist repeated minor impacts better; ABS keeps entry-level helmets affordable. Premium motorcycle and cycling helmets are predominantly PC or composite.

Electronics Enclosures

Indoor, room-temperature device housings: ABS, and it isn’t close on value. Add heat (adapters, chargers, battery packs), UL94 V-0 with margin, or a transparent window: PC or FR-PC. Laptop-class durability at consumer price: PC-ABS. See rapid prototyping for consumer electronics and IoT for enclosure development.

Automotive

The industry uses both by zone: ABS (often plated) for interior trim, wheel covers, and dashboards; PC for headlamp and tail-lamp lenses and light guides; PC-ABS for structural interior parts. More in automotive manufacturing and across the industries Manufyn serves.

Frequently asked questions