Question

sls: materials
use the information below to answer the question.
when deciding what materials are suitable for selective laser sintering, you want a material that has good thermal resistance.
types of materials
nylon is a polyamide (thermoplastic), which can be re - melted. these properties make nylon a good choice of material for the sls process.
pa - 12 nylon has good strength, cost - effectiveness, and chemical resistance. it has a matte, rough surface.
alumide has a dull gray metallic appearance and good temperature resistance.
pa - gf is a glass - filled nylon that has a good strength - to - weight ratio, and good wear resistance.
characteristics of pa - 12
pa - 12 has good characteristics that make it good for a range of applications.
mechanically, it has good impact resistance and good moisture resistance. it also has good chemical resistance along with good heat resistance. the mechanical properties of pa - 12 can be further enhanced with the addition of carbon, glass, or aluminum to increase the tensile strength.
parameters of pa - 12
what is the average cost for pa - 12 nylon?
$100 - 150 per kilogram
$50 - 60 per kilogram
$20 - 30 per kilogram
$80 - 100 per kilogram

Explanation:

Step1: Find cost range

The cost range for PA - 12 nylon is given as $100 - 150 per kilogram.

Step2: Calculate average

The formula for the average of a range $a$ to $b$ is $\frac{a + b}{2}$. Here $a = 100$ and $b=150$. So, $\frac{100 + 150}{2}=\frac{250}{2}=125$.

Answer:

$125 per kilogram