PPS (Polyphenylene Sulfide) (UNS PPS-40GF) is a moderate-to-machine material that we run regularly for export customers. It has a density of 1.65 g/cm3, a tensile strength of 190 MPa and a typical hardness of R 120 (Rockwell). Those numbers make it the right choice for high-temp fixtures and chemical pumps, and a poor choice when cost or corrosion resistance matters more than mechanical performance.
On our machines we hold +/-0.02 mm on turned and milled features and reach Ra 0.8 um where the drawing calls for it. Standard lead time for PPS (Polyphenylene Sulfide) parts is 3-7 working days, including material procurement, machining and any finishing operation you specify.
PPS (Polyphenylene Sulfide): key properties
| Property | Value |
|---|---|
| UNS / designation | PPS-40GF |
| Density | 1.65 g/cm3 |
| Tensile strength | 190 MPa |
| Hardness | R 120 (Rockwell) |
| Machinability | Moderate |
| Suggested cutting speed (carbide) | 200-350 m/min |
| Relative material cost | 4 of 5 |
Machining PPS (Polyphenylene Sulfide): what to plan for
- Glass-filled grades are abrasive
- Brittle at low temperature
Cutting speed for PPS (Polyphenylene Sulfide) with carbide tooling sits around 200-350 m/min. Going faster burns the edge; going much slower causes rubbing and a poor surface. Air blast or flood coolant both work, but chip evacuation must be positive. If your part has thin walls or a lot of stock to remove, say so in the RFQ — we plan roughing, stress relief and finishing as separate operations when the geometry demands it.
Parts we machine in PPS (Polyphenylene Sulfide)
- High-temp fixtures
- Chemical pumps
- Automotive under-hood
- Electrical insulators
Most PPS (Polyphenylene Sulfide) work arrives as 2D drawings with a mix of critical and non-critical features. Loosening tolerance on the non-critical ones is the fastest way to cut cost, and we will tell you which features those are before we quote.
Tolerances, finish and lead time
| Item | Capability |
|---|---|
| General tolerance | +/-0.02 mm |
| Achievable surface finish | Ra 0.8 um |
| Minimum wall thickness | 0.8 mm (aluminium) / 1.0 mm (steel and stainless) |
| Typical lead time | 3-7 working days |
| Prototype quantity | 1 piece |
| Production quantity | 10 to 50,000 pieces |
Frequently asked questions
What is the lead time for PPS (Polyphenylene Sulfide) parts?
Standard is 3-7 working days from drawing release, assuming the material is in stock. Exotic grades and cast forms can add 5 to 10 days. Finishing such as anodizing or plating adds 3 to 5 days.
What tolerance can you hold in PPS (Polyphenylene Sulfide)?
+/-0.02 mm is routine on turned and milled features. Tighter than that is possible on specific features by grinding or lapping, but it is quoted separately because it changes the process.
Do you keep PPS (Polyphenylene Sulfide) in stock?
We hold common sizes of PPS (Polyphenylene Sulfide) and buy mill-certified stock for everything else. Material certificates are supplied with the parts on request.
Can you supply PPS (Polyphenylene Sulfide) parts with a certificate of conformity?
Yes. We issue a dimensional report, a material certificate and a certificate of conformity as standard for production orders, and full PPAP or AS9102 paperwork when the programme requires it.
Related pages
- Materials — the full index for this section.
- ULTEM (PEI) CNC Machining for Aerospace and Medical
- PMMA Acrylic CNC Machining: Clear Optical Parts
- Acetal Copolymer (POM-C) CNC Machining Guide
- 6061 Aluminum CNC Machining: Specs, Tolerances, Cost
- Instant CNC quote
- Tolerance quick reference
- Frequently asked questions
Get a price for your part
Send a STEP file and a drawing with tolerances, material and quantity. We quote within one working day and machine in our own facility in Shenzhen — milling, turning, EDM, grinding and finishing under one roof, no trading middleman.
Start an instant quote or send your drawings directly. English-speaking engineering support, DFM feedback before you commit to a batch.