Which material should I spec for an end-use production part?

PETG for most of them. It pulls to about 50 MPa, holds shape to about 73 C, bonds well between layers, and resists creep under steady load. Move to ABS when the part sees heat up to about 98 C or needs paint. Move to PA-CF at 80 MPa and 140 C when the part is structural.

Is PETG stronger than PLA?

Their tensile numbers are nearly the same, near 50 MPa each, so on paper they tie. In a working part PETG is clearly better. It gives a little before it breaks, so a knock bends it instead of cracking a layer seam. It also holds shape to 73 C against PLA's 57 C, and it resists creep far better under steady load.

Is ABS stronger than PETG?

Not in tension. PETG pulls to about 50 MPa against ABS at about 40 MPa. ABS wins on heat, holding shape to about 98 C, and it takes paint and solvent glue better. It also moves the most as it cools, so a wide flat ABS part can pull out of square. For most parts we still spec PETG.

Do 3D printed parts sag over time?

They can, under a load that never lets up. Engineers call it creep, and heat makes it faster. PLA is the worst of these three by a clear margin, which is why we keep it off parts that hold weight. PETG and ABS both hold up much better, and PA-CF is the best choice when a part must not move at all.

Which of the three warps least on a big flat part?

PLA moves the least as it cools and holds the drawn size best, with PETG close behind. ABS moves the most, so a flat face past roughly 150 mm can lift at the corners. If the part is both wide and flat and has to sit true, PETG is usually the safest of the three.

Which material is best for outdoor parts?

PETG. It handles sun and rain, resists moisture, and holds shape to about 73 C. ABS also survives outdoors and takes more heat. Skip PLA outside, since it softens near 57 C and gets brittle with sun exposure over time.

When do I need something beyond these three?

Two cases. When the part is structural or sees heat past about 98 C, step up to PA-CF, which pulls to 80 MPa and holds shape to 140 C. When the part has to bend, seal, or grip, none of these three work at all, and TPU at 35 MPa is the answer.

PLA vs PETG vs ABS: which one survives an end-use part

By the 3D Printer on Demand team · Updated July 2026

For an end-use production part, PETG is the default of the three, and the tensile numbers are not why. PLA and PETG both pull to about 50 MPa, and ABS lands near 40 MPa. Those numbers are close enough that they rarely decide anything. What decides it is what happens after the part goes to work. How much heat it takes under load. How well the layers hold together. Whether it sags after months of steady load. And how much it moves as it cools. On those four, the three plastics are not close at all.

The four properties that actually decide the spec

Tensile strength gets quoted the most and settles the least. Every one of these plastics is strong enough to pull hard on. Production parts almost never fail by being pulled apart in a straight line.

They fail by getting warm and going soft. They fail by splitting along a layer. They fail by slowly sagging under a load that never lets up. Or they never fit right in the first place, because a wide flat face pulled out of square as it cooled. Here is where the three land on each one.

PLA, PETG, and ABS compared on the properties that decide an end-use part.
	PLA	PETG	ABS
Tensile strength	50 MPa	50 MPa	40 MPa
Holds shape to	57 C	73 C	98 C
Layer bond	Stiff but brittle, cracks at the seam	Strong, bends before it breaks	Strong, bonds well
Creep under steady load	Worst of the three	Holds up well	Holds up well
Movement as it cools	Least, holds drawn size best	Close to PLA	Most, wide flats pull out of square
Best production use	Indoor visual parts	The default for working parts	Heat, impact, painted parts

Heat under load is the real split

The heat number is where these three separate hardest. PLA starts losing shape near 57 C. PETG holds to about 73 C. ABS holds to about 98 C.

Those are not room-temperature numbers, and that is the point. A sunny window, a warm plant, a closed vehicle, a spot near a motor or a power supply all run hotter than the room does. A PLA part in any of those is a part that will slump.

So spec with margin. Take the hottest the part will ever see, then leave room under the limit. If your answer lands close to 98 C, you are past what these three can do well, and PA-CF at 140 C is the next step.

Layer bond decides whether the part cracks

A printed part is weakest between its layers. That means the plastic's ability to weld to itself matters as much as its raw strength.

PLA is stiff and prints clean, but it is brittle. A drop or a sharp knock finds the layer seam and splits it. PETG is the opposite. It gives a little first, so the same hit bends the part instead of cracking it. ABS bonds well between layers too, which is part of why it holds up to rough handling.

Print angle matters more than material here. Aim the layers across the load and every one of the three gets stronger. Our design guide covers how to set that up.

Creep: what a bracket looks like after six months

Plastic under steady load slowly changes shape. Engineers call it creep, and it is the failure mode buyers most often forget to ask about.

PLA is the worst of the three by a clear margin, and it gets worse as the part warms up. A PLA bracket can look fine on day one and sag by month six. PETG and ABS both hold up much better under a load that never lets go.

That is the main reason we steer working parts off PLA even when the heat and strength numbers look fine on paper. A part that only ever gets pulled on once is a very different job from a part that holds weight every day for a year.

How much each one moves as it cools

Every plastic pulls in as it cools. How much it pulls decides whether a wide flat part comes out square.

PLA moves the least, so it holds the drawn size best. PETG runs close behind. ABS moves the most, which is why a big flat ABS floor can lift at the corners.

The practical rule is about footprint. Once a flat face passes roughly 150 mm, ABS gets risky and PETG is the safer call. Ribs and a split part both help. For the full picture on what FDM can hold, see our tolerances guide.

Which one to spec, by job

Match the plastic to what the part actually does, and the choice stops being a debate.

Indoor working parts, enclosures, jigs, outdoor mounts: PETG. It is the default for a reason.
Near a motor, in a vehicle, or anywhere warm: ABS, or PA-CF if it goes past 98 C.
A part you will paint or bond: ABS. Paint and solvent glue both stick to it best.
A visual model, a demo unit, or a packaging insert: PLA. Cheap, clean detail, no load.
Anything that hangs, holds, or carries weight for months: not PLA.
A load-bearing structural part: step up to PA-CF at 80 MPa and 140 C.
A gasket, pad, or anything that flexes: TPU, not any of these three.

What changes when you go from 10 parts to 1,000

The material choice does not change at volume, but two practical things do.

First, quoting. PLA and PETG price instantly on our instant quote page. ABS routes to a fast human quote, and our team replies within four business hours. If ABS is your spec, build that step into your timeline.

Second, price. One flat price per part, stepping down at 10, 50, 250, and 1,000 units. That price holds for 30 days, so a quote does not go stale before a purchase order clears. The tiers are on our pricing page. Parts ship in 2 to 5 days, made in the USA.

Quick takeaways

Tensile numbers barely separate these three. PLA and PETG both pull to about 50 MPa, ABS to about 40 MPa.
Heat under load is the real split: PLA 57 C, PETG 73 C, ABS 98 C.
PLA is brittle at the layer seam. PETG gives a little first, so it bends instead of cracking.
PLA creeps worst under steady load. That is the main reason we keep it off working parts.
ABS moves the most as it cools, so flat faces past about 150 mm get risky.
PETG is the default for end-use parts. Move to ABS for heat and paint, PA-CF for structure.
PLA and PETG price instantly. ABS routes to a human quote within four business hours.

Have a part to print? Get an instant price.

Instant Quote

Common questions

Which material should I spec for an end-use production part?: PETG for most of them. It pulls to about 50 MPa, holds shape to about 73 C, bonds well between layers, and resists creep under steady load. Move to ABS when the part sees heat up to about 98 C or needs paint. Move to PA-CF at 80 MPa and 140 C when the part is structural.
Is PETG stronger than PLA?: Their tensile numbers are nearly the same, near 50 MPa each, so on paper they tie. In a working part PETG is clearly better. It gives a little before it breaks, so a knock bends it instead of cracking a layer seam. It also holds shape to 73 C against PLA's 57 C, and it resists creep far better under steady load.
Is ABS stronger than PETG?: Not in tension. PETG pulls to about 50 MPa against ABS at about 40 MPa. ABS wins on heat, holding shape to about 98 C, and it takes paint and solvent glue better. It also moves the most as it cools, so a wide flat ABS part can pull out of square. For most parts we still spec PETG.
Do 3D printed parts sag over time?: They can, under a load that never lets up. Engineers call it creep, and heat makes it faster. PLA is the worst of these three by a clear margin, which is why we keep it off parts that hold weight. PETG and ABS both hold up much better, and PA-CF is the best choice when a part must not move at all.
Which of the three warps least on a big flat part?: PLA moves the least as it cools and holds the drawn size best, with PETG close behind. ABS moves the most, so a flat face past roughly 150 mm can lift at the corners. If the part is both wide and flat and has to sit true, PETG is usually the safest of the three.
Which material is best for outdoor parts?: PETG. It handles sun and rain, resists moisture, and holds shape to about 73 C. ABS also survives outdoors and takes more heat. Skip PLA outside, since it softens near 57 C and gets brittle with sun exposure over time.
When do I need something beyond these three?: Two cases. When the part is structural or sees heat past about 98 C, step up to PA-CF, which pulls to 80 MPa and holds shape to 140 C. When the part has to bend, seal, or grip, none of these three work at all, and TPU at 35 MPa is the answer.