Polypropylene

At a Glance

Process

Lead Time

Colors

Tolerance

Price

Applications

3 days (rush)
5-7 days (standard)
Semi-clear white (default)
Opaque white (by request)
ISO 2768
$
Containers, laboratory equipment

About the Material

Polypropylene (PP) resists most solvents and chemicals, which makes it a wonderful material to manufacture laboratory equipment and containers for a variety of applications. PP also offers good fatigue strength.

Material Properties

Polypropylene

Yield Strength (tensile)

Elongation at Break

Hardness

Density

Maximum
Temp

McMaster Part Number

2,500 psi
34%
Rockwell R55
0.042 lbs / cu. in.
176° F

Material Finish

Design Recommendations

Min Wall Thickness

Min End Mill Size

Min Drill Size

Max Part Size

Undercuts

Radii : Depth

0.5 mm
0.8 mm
(0.03 in)
0.5 mm
(0.02 in)
1200 x 500 x 152 mm [x,y,z] (mill) 

152 x 394 mm 
[d,h] (lathe)
Square profile, full radius, dovetail profiles
Depth must not exceed 12x drill bit diameter.
For end mills, depth must not exceed 10x tool diameter.

Cost Saving Tip

To reduce costs, limit the number of part setups, the number of inspection dimensions or tight tolerances, and deep pockets with small radii.

Related Resources

Engineer's Guide to CNC Machining for Prototyping Hardware
Fictiv CNC Material Datasheet