PEEK-450G BLK (450G Black)
Additive grade
also 450G
Same mechanical set as natural 450G but with markedly better UV/weathering and light-blocking behaviour.
Values for the BLK condition
Other PEEK-450G grades and fills
PEEK-450G is listed in 5 conditions; see the grade overview at PEEK-450G.
Compare all 5 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
ESD / static-dissipative | Use for wafer handling, chip trays and fuel-contact parts needing controlled surface resistivity. | 90 | 90 | 10 | 86 Shore D |
BLKThis page 450G Black | Same mechanical set as natural 450G but with markedly better UV/weathering and light-blocking behaviour. | 100 | 100 | 40 | 85 Shore D |
450FC30 | Choose for unlubricated bushings, seals, thrust washers and high-PV sliding contact. | — | 130 | 2.5 | — |
450GL30 | Pick for maximum stiffness, creep resistance and dimensional stability above Tg while keeping electrical insulation. | — | 165 | 2.5 | 102 HRM |
450CA30 | Highest strength/stiffness and best thermal conduction and wear; use where static-dissipative behaviour is acceptable or desired. | — | 224 | 1.8 | 105 HRM |
What is PEEK-450G BLK?
PEEK-450G BLK is PEEK-450G in the BLK grade — same mechanical set as natural 450G but with markedly better UV/weathering and light-blocking behaviour. PEEK-450G BLK has a yield strength of 100 MPa (14.5 ksi) and a tensile strength of 100 MPa (14.5 ksi) — stronger than 95% of polymer grades. Elongation at break is 40% and the elastic modulus is 3.8 GPa (0.551 Msi). PEEK-450G BLK has a density of 1.3 g/cm³ (0.047 lb/in³), heavier than 69% of polymer grades. Its glass-transition temperature is 143°C (289 °F).
Advantages
- Tough — resists crack growth — 6.3 MPa·√m (5.73 ksi·√in), better than 99% of polymer grades
- High strength — 100 MPa (14.5 ksi), better than 95% of polymer grades
- High service temperature — 250°C (482 °F), better than 94% of polymer grades
- Good corrosion resistance — 92/100, better than 91% of polymer grades
- Stiff — 3.8 GPa (0.551 Msi), better than 85% of polymer grades
Limitations
- High embodied carbon — 16 kg CO₂/kg, worse than 98% of polymer grades
PEEK-450G BLK properties
Typical room-temperature values for PEEK-450G BLK; 27 are specific to this condition. Other listed values are PEEK-450G reference data and may not represent this condition. Bars are the position among polymer grades.
Physical6
PEEK-450G BLK has a density of 1.3 g/cm³ (0.047 lb/in³), heavier than 69% of polymer grades. Its glass-transition temperature is 143°C (289 °F).
Mechanical17
PEEK-450G BLK has a yield strength of 100 MPa (14.5 ksi) and a tensile strength of 100 MPa (14.5 ksi) — stronger than 95% of polymer grades. Elongation at break is 40% and the elastic modulus is 3.8 GPa (0.551 Msi).
Thermal10
PEEK-450G BLK is rated for continuous service to 250°C (482 °F). It conducts heat at 0.25 W/m·K (0.144 BTU/hr·ft·°F), better than 72% of polymer grades. Thermal expansion is 47 µm/m·K (26.1 µin/in·°F).
Electrical7
PEEK-450G BLK is an electrical insulator with a dielectric strength of 20 kV/mm (508 V/mil) and a resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 91% of polymer grades. UV resistance is very good.
Sustainability4
Producing a kilogram of PEEK-450G BLK takes about 290 MJ of energy and emits 16 kg of CO₂ — more than 95% of polymer grades. Typical recycled content is 0%.
Manufacturability8
PEEK-450G BLK's machinability is very good (70/100, better than 74% of polymer grades); weldability good (55/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with PEEK-450G BLK
Is PEEK-450G easy to machine?
Machines like a tough engineering plastic: sharp carbide/PCD tools, high speed with light feeds, generous coolant/air to avoid heat build-up; stress-relieve (annealing 200–250 °C) before finish cuts on thick stock.
Can PEEK-450G be welded?
Joinable by ultrasonic, laser, IR/hot-plate and spin welding as well as fusion bonding of composites; solvent bonding is not possible, so adhesives require plasma or abrasive surface activation.
Can PEEK-450G be formed, bent or molded?
Dry to <0.02 % moisture (150 °C, 3 h) and inject at 360–400 °C melt with a 175–205 °C mold to develop full crystallinity; hot-runner and all-metal barrels needed, and low mold temperature gives amorphous, brittle, dimensionally unstable parts.
What surface finishes work on PEEK-450G?
Takes fine machined or polished surfaces; can be plasma-treated, laser-marked or metallized, but has no anodize/plate analogue and unpigmented parts yellow under UV exposure.
PEEK-450G chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance.
| Element | Spec limit (wt %) |
|---|---|
| glass fiber0 in 450G; 20–30 wt% in GL20/GL30 variants | ≈ 0 |
| carbon fiber0 in 450G; 20–30 wt% in CA20/CA30 variants | ≈ 0 |
| PTFE + graphite0 in 450G; ~10+10 wt% in FC30 bearing grade | ≈ 0 |
| poly(oxy-1,4-phenylene-oxy-1,4-phenyleneunfilled, unpigmented base resin; semi-crystalline, ~30–35% crystallinity when properly molded | balance |
PEEK-450G BLK — frequently asked
What is PEEK-450G BLK used for?
PEEK-450G BLK is typically used for stock rod/plate/tube, general machined components, semiconductor parts and chemical process components. In short: baseline unfilled PEEK; toughest PEEK variant; widest stock availability.
What is the yield strength of PEEK-450G BLK?
PEEK-450G BLK has a typical yield strength of 100 MPa (14.5 ksi) and a tensile strength of 100 MPa (14.5 ksi) — stronger than 95% of polymer grades. Strength varies by condition: see the 5 listed tempers.
Is PEEK-450G BLK easy to machine?
Yes — machinability is rated very good (70/100, better than 74% of polymer grades). Machines like a tough engineering plastic: sharp carbide/PCD tools, high speed with light feeds, generous coolant/air to avoid heat build-up; stress-relieve (annealing 200–250 °C) before finish cuts on thick stock.
Can PEEK-450G BLK be welded?
Yes — weldability is rated good (55/100). Joinable by ultrasonic, laser, IR/hot-plate and spin welding as well as fusion bonding of composites; solvent bonding is not possible, so adhesives require plasma or abrasive surface activation.
What surface finishes work on PEEK-450G BLK?
Takes fine machined or polished surfaces; can be plasma-treated, laser-marked or metallized, but has no anodize/plate analogue and unpigmented parts yellow under UV exposure.
Can PEEK-450G BLK be formed, bent or molded?
Dry to <0.02 % moisture (150 °C, 3 h) and inject at 360–400 °C melt with a 175–205 °C mold to develop full crystallinity; hot-runner and all-metal barrels needed, and low mold temperature gives amorphous, brittle, dimensionally unstable parts.
What is the maximum service temperature of PEEK-450G BLK?
PEEK-450G BLK is rated for continuous use to about 250°C (482 °F), and briefly to 310°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- VICTREX PEEK 450G product datasheet — Victrex plc (2023)
- TECAPEEK natural / GF30 / CF30 stock shape data — Ensinger GmbH (2023)
- CAMPUS plastics single-point data, PAEK/PEEK — CAMPUS / CWFG (2024)
- ISO 10350-1 / ISO 527 / ISO 178 / ISO 75 acquisition of single-point data — ISO (2017)
- Engineering Plastics, Engineered Materials Handbook Vol. 2 — ASM International (1988)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.