PEI (Ultem) vs PP GF30: 0% composition overlap. Significantly different materials serving different application areas.
PEI (Ultem) vs PP GF30
Side-by-side chemical composition and mechanical property comparison.
Overview
PEI (Ultem)
Polyetherimide — high-performance amorphous thermoplastic. Similar properties to PEEK at lower cost but lower impact strength and use temp. Transparent amber color. Tg 217°C, inherent flame resistance (UL94 V-0 at 0.4mm), very low smoke. Hydrolytically stable (2000+ autoclave cycles). Trade name Ultem (SABIC). Used for aerospace interior panels, medical sterilizable devices, electrical insulators, semiconductor handling, and 3D-print build plates.
PP GF30
Polypropylene with 30% short glass fiber — a cost-effective alternative to PA GF30 for applications up to ~130°C. Much cheaper base resin (PP vs PA), zero moisture sensitivity, and excellent chemical resistance. Lower strength than PA6 GF30 (UTS 80 vs 175 MPa) but sufficient for many structural parts. Trade names include Celstran PP-GF30 (Celanese), Tepex (LANXESS), Stamax (SABIC). Used for automotive front-end carriers, battery trays, HVAC components, and household appliance frames.
| PEI (Ultem) | PP GF30 | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ISO 10350 | ISO 10350 |
Chemical composition (wt%) — Pro
| Element | PEI (Ultem) | PP GF30 | Overlap |
|---|---|---|---|
| Base Polymer (Polyetherimide) | 99–99.9% | — | — |
| Polypropylene (Base Polymer) | — | 68–72% | — |
| Glass Fiber Reinforcement | — | 28–32% | — |
Mechanical properties — Pro
| Property | PEI (Ultem) | PP GF30 | Unit |
|---|---|---|---|
| Tensile Strength | 85–105 | 70–90 | MPa |
| Yield Strength | 85–100 | — | MPa |
| Elongation | 50–60 | 3–5 | % |
| Elastic Modulus | |||
| Density | |||
| Glass Transition Temp (Tg) | |||
| Continuous Use Temp | |||
| Water Absorption (24h) | |||
| Melting Point | |||
| hdt_1_8mpa |
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Sign up free — 3 comparisons/day freeCompatibility Assessment
PEI (Ultem) and PP GF30 have significantly different compositions (0% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is PEI (Ultem) the same as PP GF30?
PEI (Ultem) and PP GF30 have a 0% composition overlap. They are generally not directly interchangeable.
Can I replace PEI (Ultem) with PP GF30?
Generally not recommended. The compositions differ significantly (0% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between PEI (Ultem) and PP GF30?
The main differences are in the following elements: overall alloying content. PEI (Ultem) is a Polymers grade, while PP GF30 is a Polymers grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.