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PPS Machining

A Guide to PPS CNC Machined Parts: Properties, Applications and Design Considerations

What is PPS?

Polyphenylene sulphide (PPS) is a semi-crytalline, high temperature thermoplastic polymer. PPS offers the broadest resistance to chemicals of any advanced engineering plastic.

Because of PPS's chemical structure it's a highly resistant polymer with high strength and hardness, especially in the higher temperatures. PPS has good dimensional stability as well as low moisture absorption.

Main Attributes of PPS:

High chemical resistance
High temperature performance
High modulus when reinforced
Good mechanical strength
Low water absorption
Good dimensional stability
Excellent electrical properties
High purity characteristics
High maximum allowable temperature in air (220°C continuously, 260°C in bursts)
Suitable for food contact

Detailed information about plastic PPS for designers can be found in the tabs below. Please note: this information is provided as a guide only.

PPS Machining Service - PPS Milling & Turning

Penta Precision supplies highly accurate PPS machined parts throughout the UK. Customers turn to us when they have had quality and delivery issues with their existing suppliers and need a reliable precision machining partner.

We communicate well with customers, we take care with the projects placed with us and we are consistent in our service delivery. See our Proven Process page to find out more about our winning formula.

''Penta always provide a professional and high quality service and always deliver on or before the agreed delivery date. As well as electronic communication we have had many face to face meetings with them which they were always happy to attend and offer advice as well as discuss challenging work so that it could be progressed onto manufacture.'' Adam - Development Engineer

Penta Precision provides the following PPS machining services:

CNC milling – prototypes & large batch runs
CNC turning – prototypes & large batch runs
Insert installation
Part marking
Manual milling
Manual turning
Machining design advice
Machining drawing service

Reasons to Choose Penta:

ISO 9001:2015 quality assurance
Consistent high quality machined parts
Reliable delivery dates - our track record speaks volumes
Exceptional customer service and communication
Machining design advice
Extensive experience in our field

We are regularly machining PPS for customers all over the UK. Our customers depend on our machining expertise as well as our outstanding delivery performance, to machine the highest quality parts. If you'd like to discuss how we can help you with your PPS machining requirements, here's a list of ways to get in touch with us.

Mechanical Properties	Value	Parameter	Norm	Notes
Modulus of Elasticity (tensile test)	6500 MPa	1mm/min	DIN EN ISO 527-2	For tensile test specimen type 1b
Tensile Strength	83 MPa	50mm/min	DIN EN ISO 527-2
Tensile Strength at Yield	83 MPa	50mm/min	DIN EN ISO 527-2
Elongation at Yield	2%	50mm/min	DIN EN ISO 527-2
Elongation at Break	2%	50mm/min	DIN EN ISO 527-2
Flexural Stength	145 MPa	2mm/min, 10 N	DIN EN ISO 178	For flexural test: support span 64mm, norm specimen
Modulus of Elasticity (flexural test)	6600 MPa	2mm/min, 10 N	DIN EN ISO 178
Compression Strength	21/41/105 MPa	1%/2%/5%	EN ISO 604	Specimen 10x10x10mm
Compression Modulus	4600 MPa	5mm/min, 10 N	EN ISO 604	Specimen 10x10x50mm, modulus range between 0.5 and 1% compression
Impact Strength (Charpy)	24 kJ/m²	max. 7.5J	DIN EN ISO 179-1eU	For Charpy test: support span 64mm, norm specimen
Ball Indentation Hardness	343 MPa		ISO 2039-1	Specimen in 4mm thickness

Mechanical Properties

Value

Parameter

Norm

Notes

Modulus of Elasticity (tensile test)

6500 MPa

1mm/min

DIN EN ISO 527-2

For tensile test specimen type 1b

Tensile Strength

83 MPa

50mm/min

DIN EN ISO 527-2

Tensile Strength at Yield

83 MPa

50mm/min

DIN EN ISO 527-2

Elongation at Yield

50mm/min

DIN EN ISO 527-2

Elongation at Break

50mm/min

DIN EN ISO 527-2

Flexural Stength

145 MPa

2mm/min, 10 N

DIN EN ISO 178

For flexural test: support span 64mm, norm specimen

Modulus of Elasticity (flexural test)

6600 MPa

2mm/min, 10 N

DIN EN ISO 178

Compression Strength

21/41/105 MPa

1%/2%/5%

EN ISO 604

Specimen 10x10x10mm

Compression Modulus

4600 MPa

5mm/min, 10 N

EN ISO 604

Specimen 10x10x50mm, modulus range between 0.5 and 1% compression

Impact Strength (Charpy)

24 kJ/m²

max. 7.5J

DIN EN ISO 179-1eU

For Charpy test: support span 64mm, norm specimen

Ball Indentation Hardness

343 MPa

ISO 2039-1

Specimen in 4mm thickness

Thermal Properties	Value	Parameter	Norm	Notes
Glass Transition Temperature	93°C		DIN EN ISO 11357	Found in public sources
Melting Temperature	280°C		DIN EN ISO 11357
Service Temperature	260°C	short term	NN	Found in public sources. Individual testing regarding application conditions is mandatory
Service Temperature	230°C	long term	NN
Thermal Expansion (CLTE)	5 10^-5*1/K	23-100°C, long	DIN EN ISO 11359-1;2
Thermal Expansion (CLTE)	4 10^-5*1/K	23-60°C, long	DIN EN ISO 11359-1;2
Specific Heat	0.9 J/(g*K)		ISO 22007-4:2008
Thermal Expansion (CLTE)	10 10-5*1/K	100-150°C, long	DIN EN ISO 11359-1;2

Thermal Properties

Value

Parameter

Norm

Notes

Glass Transition Temperature

93°C

DIN EN ISO 11357

Found in public sources

Melting Temperature

280°C

DIN EN ISO 11357

Service Temperature

260°C

short term

Found in public sources. Individual testing regarding application conditions is mandatory

Service Temperature

230°C

long term

Thermal Expansion (CLTE)

5 10^-5*1/K

23-100°C, long

DIN EN ISO 11359-1;2

Thermal Expansion (CLTE)

4 10^-5*1/K

23-60°C, long

DIN EN ISO 11359-1;2

Specific Heat

0.9 J/(g*K)

ISO 22007-4:2008

Thermal Expansion (CLTE)

10 10-5*1/K

100-150°C, long

DIN EN ISO 11359-1;2

Electrical Properties	Value	Parameter	Norm	Notes
Specific Surface Resistance	10¹⁴ Ω	Silver electrode, 23°C, 12% r.h.	DIN IEC 60093	Specimen in 20mm thickness
Specific Volume Resistance	10¹⁴ Ω*cm	Silver electrode, 23°C, 12% r.h.	DIN IEC 60093	Due to the black colourant and moisture update of the material the electrical insulation properties cannot be 100% guaranteed, despite single measurements suggesting otherwise.
Dielectric Strength	32 kV/mm	23°C, 50% r.h.	ISO 60243-1	Specimen in 1mm thickness
Resistance to tracking (CTI)	125V	Platin electrode, 23°C, 50% r.h., solvent A	DIN EN 60112

Electrical Properties

Value

Parameter

Norm

Notes

Specific Surface Resistance

10¹⁴ Ω

Silver electrode, 23°C, 12% r.h.

DIN IEC 60093

Specimen in 20mm thickness

Specific Volume Resistance

10¹⁴ Ω*cm

Silver electrode, 23°C, 12% r.h.

DIN IEC 60093

Due to the black colourant and moisture update of the material the electrical insulation properties cannot be 100% guaranteed, despite single measurements suggesting otherwise.

Dielectric Strength

32 kV/mm

23°C, 50% r.h.

ISO 60243-1

Specimen in 1mm thickness

Resistance to tracking (CTI)

125V

Platin electrode, 23°C, 50% r.h., solvent A

DIN EN 60112

Other Properties	Value	Parameter	Norm	Notes
Water Absorption	0.01%	24h/96h (23°C)	DIN EN ISO 62	Ø ca. 50mm, h=13mm
Resistance to Hot Water/Bases	+			+Good resistance
Resistance to Weathering	(+)			(+) Limited resistance
Flammability (UL94)	V0	Corresponding to	DIN IEC 60695-11-10	Corresponding means no listing at UL (yellow card). The information might be taken from resin, stock shape or estimation. Individual testing regarding application conditions is mandatory.
Density	1.63g/cm³

Other Properties

Value

Parameter

Norm

Notes

Water Absorption

0.01%

24h/96h (23°C)

DIN EN ISO 62

Ø ca. 50mm, h=13mm

Resistance to Hot Water/Bases

+Good resistance

Resistance to Weathering

(+)

(+) Limited resistance

Flammability (UL94)

Corresponding to

DIN IEC 60695-11-10

Corresponding means no listing at UL (yellow card). The information might be taken from resin, stock shape or estimation. Individual testing regarding application conditions is mandatory.

Density

1.63g/cm³