A Guide to Materials Selection Process

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A Guide to Materials Selection Process
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Nordic Development Team
Jon Asle Sjöli Market- Development Manager
Nordic
Joacim Ejeson Development Engineer Nordic
Bengt Lindqvist Senior Sales Professional Nordic
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My objective

• A brief introduction to make plastics a natural
  part of your material choise options in future.

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Introduction
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Why Use Plastics ?
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Why use Plastics?

• Light weight
• Corrosion resistance
• Colourability
• Design flexibility
• Low wear and low friction
• Heat and electrical insulation
• Manufacturing process flexibility
• Re-cyclability
• Cost

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Light weight!
Density Range from 0.9 to 2.5 g/cm3 Glass 2.5
2 Aluminium 2.7 Stainless Steel 7.85 Brass
8.38 Copper 8.94
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Design Flexibility
Multi-components integration
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Colourability
No second or third operations
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Amorphous vs. Crystalline
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Amorphous vs. Crystalline
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Semi-Crystalline
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Amorphous
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Material Selection flow Chart
List all essential requirements Specifications,
stresses, tolerances, chemicals, service
environment..
Desirable requirements Appearance, gloss would be
an advantage if
List and evaluate possible materials Use campus
or other materials databases, product
literature..
Profitability Analysis Wall thickness and
production time, multifunction, recycling
moulding conditions, of mould cavities,
predrying,..
Similar Components Experience in operation by
specialists or suppliers..
Classifiction of usable materials
Material Chosen For Use
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Design Factors
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Plastics vs. Metals
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Comparison between plastics and metals
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When replacing metals, re-design is ALWAYS
Necessary
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Temperature performance
PEEK
Zenite LCP
Vespel PI
Ryton PPS
Phenolic
PEI
Xtel PPS/PA
Zytel HTN PPA
Rynite PET
PA 4/6
Crastin PBT
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Clear Polymers
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Clear Polymers
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Clear Polymers
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Automated tooling head

• Continuous load 6 kg
• Flexible grip
• Endure direct heat from metal shavings..
• Chemical resistance..

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Application spec

• Creep resistant
• Fatigue resistant
• Temp resistant
• Corrosion resistant
• Low part cost

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Excisting part

• Aluminium die casting, machined steel
• Parts 160
• Weight 15 kg
• Manufacturing 4 HRS

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Polymer solution

• Multiple function Delrin mould
• Components
• 22 (versus 160)
• Weight
• 5 kg (versus 15 kg )
• Manufacturing
• 20 min (versus 4 HRS)

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One of your customers is planning to produce a
pressure vessel in Acetal.
He says it is a new model and that they have
been using high viscous Acetal copolymer in
earlier models without having problem. The mould
has not yet been made. Lets challenge the choise
of material !
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What information about the purifier do you need
to ask for?
?
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Necessary Information

• Part weight 1kg
• Annual volume 100.000
• Wall thickness 4mm
• Mechanical requirements Stiffness,tensile
  strength,toughness
• Chemical requirements Water(not drinking water)
• Temperature requirements 10-60 C
• Colour Natural
• UV Indoor

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MCBase - Delrin vs Hostaform
Material Stiffness Tensile
Elongation Elongation Creep
Charpy
strength at
break at yield modulus
notched
impact str
MPa MPa

MPa kJ/m2
Delrin 100 3100 71
45 25
1600 15
Delrin 100P 3000 70
45 22
1500 15
Delrin 111P 3200 72
40 19
1700 12
Hostaform C2521 2600 62
32 9
1100 8.5
Hostaform C2552 2500 60
35 9.5
1100 9
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MCBase - Delrin vs Hostaform
Material Stiffness Tensile
Elongation Elongation Creep
Charpy
strength at
break at yield modulus
notched
impact str
MPa MPa

MPa kJ/m2
Delrin 100 3100 71
45 25
1600 15
Delrin 100P 3000 70
45 22
1500 15
Delrin 111P 3200 72
40 19
1700 12
Hostaform C2521 2600 62
32 9
1100 8.5
Hostaform C2552 2500 60
35 9.5
1100 9
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MCBase - Delrin vs Hostaform
Material Stiffness Tensile
Elongation Elongation Creep
Charpy
strength at
break at yield modulus
notched
impact str
1000 h
MPa MPa

MPa kJ/m2
Delrin 111P 3200 72
40 19
1700 12
Hostaform C2521 2600 62
32 9
1100 8.5
Delrin is outstanding in mechanical properties!
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What do that mean for our customers?
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Product Profiler - Delrin vs Hostaform
When you discuss your project with an EP designer
you will learn that for a pressure vessel 16
higher tensile strength will give you about the
same stress level as a 16 thinner wall thickness
gives compared to Hostaform.
Conclusion 16 thinner wall thickness will give
lower productions cost!
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Which tools can you use to prove this?
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Camdo - Delrin vs Hostaform

• Hostaform C2521 60 sec cycle time
• Delrin 111P 49 sec cycle time

What do this mean in production cost?
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Cost calculator - Delrin vs Hostaform

• We assume that the price for Hostaform C2521 is
  0.20 less than Delrin 111P.

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The Art of Material Selection

• Understand your customers expectations!
• Ask questions!
• Consult the material experts!
• Ask questions!
• Often it is a compromise!
• Ask questions!
• You should arrive at a material choice that is ??
  
• FIT for FUNCTION

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and finally..
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• A Polymer for Every Application