We were discussing the basic concept
of spring in strength of material, various
definitions and terminology used in springs, importance of
spring index and expression
for maximum bending stress and deflection developed in the plate of
leaf spring in our previous posts.
Today we will understand here the concept behind material
selection for springs manufacturing, for various types of engineering
applications, with the help of this post.
First we will see here the important characteristics required for materials of springs.
First we will see here the important characteristics required for materials of springs.
Characteristics of material for springs
There are following important characteristics
required for materials of a spring and these are as mentioned here.
1. Springs are specifically designed to be resilient
and therefore spring material must have property of resiliency.
2. Creep must be small in spring materials
3. Spring materials must have good workability
4. Spring materials must have high resistance against
impact loading
5. Spring materials must have high proportionality
limit
6. Spring materials must have small secular changes and
there must not be any variation of shape due to the remaining stress
For detailed information about the properties of
common spring materials, we can find it in PDF file by clicking PDF.
Selection factors for materials of springs
There are various factors those are very important
to consider during designing a good spring based on its applications such as
fatigue strength, corrosion resistance, workability, yield strength, toughness,
magnetic permeability, electrical conductivity, cost and availability too.
Materials selection for manufacturing of springs
Springs materials will have usually carbon contents
from 0.5% to 1% C. In case of fatigue loading or high loading, alloy steels are
used for manufacturing of springs.
There are following types of materials which are
used for spring manufacturing and these are as mentioned here
High carbon steel
Music wire spring
Hard drawn spring
High tensile hard drawn spring
Oil tempered spring
Valve spring
Alloy steel
Chrome silicon spring
Chrome vanadium spring
Stainless steel
Stainless steel 301 springs
Stainless steel 302 springs
Stainless steel 304 springs
Stainless steel 316 springs
NiCr A286 spring
17-7 PH spring
Cobalt-Nickel
Elgiloy
MP35N
Copper base alloy
Beryllium copper spring
Brass spring
Phosphor bronze spring
Phosphor spring
Nickel Base alloy
Beryllium nickel spring
Hastelloy springs
Inconel 600 springs
Inconel X750 springs
Monel 400 springs
Monel K500 springs
Nimonic springs
Nitronic springs
Rene 41 springs
Titanium
Beta C titanium spring
Do you have suggestions? Please write in comment
box.
We will now discuss another topic,difference between open coil and closed coil helical spring in the category
of strength of material, in our next post.
Reference:
Strength of material, By R. K. Bansal
Image Courtesy: Google
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