3D Printing Materials Guide: A Complete Overview of Every Filament Type

The range of 3D printing materials has exploded in recent years. While PLA and PETG cover most applications, understanding the full spectrum of available filaments helps you recommend the right material for specialised projects and expand the services you can offer. Here's a comprehensive overview of every major filament type.

Standard Filaments

PLA (Polylactic Acid): The most popular filament. Easy to print, good surface finish, biodegradable. Best for: prototypes, models, low-stress parts. Limitations: brittle, low heat resistance (60°C). Price: $25–$35/kg.

PETG (Polyethylene Terephthalate Glycol): Durable, impact-resistant, food-safe options available. Best for: functional parts, outdoor applications, containers. Limitations: strings more than PLA, slightly less detail. Price: $28–$40/kg.

ABS (Acrylonitrile Butadiene Styrene): Tough, heat-resistant, acetone-smoothable. Best for: automotive, electronics enclosures, high-impact parts. Limitations: requires enclosed printer, produces fumes. Price: $25–$35/kg.

ASA (Acrylic Styrene Acrylonitrile): Similar to ABS but UV-stable. Best for: outdoor parts exposed to sunlight. Limitations: same printing challenges as ABS. Price: $30–$45/kg.

Engineering Filaments

Nylon (PA6/PA12): Excellent wear resistance, flexibility, and toughness. Best for: gears, bearings, living hinges, snap fits. Limitations: highly hygroscopic (absorbs moisture), warps easily, requires dry storage. Price: $40–$70/kg.

Polycarbonate (PC): Extremely tough with high heat resistance (up to 140°C). Best for: high-temperature applications, transparent parts, structural components. Limitations: requires very high temperatures (260–300°C), enclosed printer essential. Price: $45–$65/kg.

TPU/TPE (Flexible): Rubber-like flexibility, excellent impact absorption. Best for: gaskets, seals, phone cases, vibration dampeners. Limitations: tricky to print (direct drive extruder recommended), slow print speeds. Price: $35–$55/kg.

Composite and Specialty Filaments

Carbon Fibre Reinforced: PLA, PETG, Nylon, or PC with chopped carbon fibres. Increased stiffness and dimensional stability with reduced weight. Requires hardened steel nozzle (carbon is abrasive). Price: $50–$90/kg.

Glass Fibre Reinforced: Similar benefits to carbon fibre but at lower cost. Less stiff but still a significant improvement over base materials. Also requires hardened nozzle. Price: $40–$65/kg.

Wood/Metal/Stone Fill: PLA or PETG with wood particles, metal powder, or mineral fill for aesthetic effects. Can be sanded, stained, or polished to mimic real materials. Best for: decorative items, props. Price: $35–$55/kg.

Choosing the Right Material

• Prototyping: PLA (fast, cheap, good detail)
• Functional indoor parts: PETG (strong, easy to print)
• Outdoor parts: ASA or PETG (UV and weather resistant)
• High-temperature: PC or ABS (heat resistant)
• Flexible parts: TPU (rubber-like properties)
• Wear-resistant moving parts: Nylon (self-lubricating, tough)
• Maximum stiffness: Carbon fibre composites (lightweight and rigid)

For most 3D printing businesses, stocking PLA, PETG, ABS, and TPU in core colours covers the vast majority of orders. Add nylon and composites as your customer base demands them — these materials require more expertise and equipment investment to handle well.