Stainless Alloys

Data covering stainless alloys is available within Granta’s MaterialUniverse data module. It can be used with GRANTA MI or CES Selector.  This data supports rational selection, enterprise material strategy, and positioning (technical and economic) of these materials.

Why would you be interested?

The data will be of value to you if you design corrosion or heat-resistant components, or supply materials for these applications, and are interested in:

  • Cost minimization
  • Optimizing durability
  • More efficient materials selection in design

It will also help if you need to pre-screen materials choices as a precursor to consulting handbooks, vendor data, and codes.

 
Initial Design
Detailed Design
 

Stainless Alloys in MaterialUniverse

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The problem

Stainless alloys are expensive and they vary enormously in:

  • Cost—by two orders of magnitude (see table, below)
  • Processability—forming, machining, welding – another cost factor
  • Corrosion resistance—both corrosion rate and type
Alloy
Approx price (US$/Kg)
Mar 2008
vs 304L
Comment
Mild Steel $0.5 0.07 Basic non-stainless steel
SS Ferritic 430 $2.4 0.33 Standard ferritic stainless
SS Austenitic 304L $7.1 1 Standard austenitic stainless
SS Austenitic 316L $11 1.5 More corrosion resistance
Inconel 825 $55 7.7 Standard Nickel-Fe-Cr alloy
Nickel 200 $81 11 Pure nickel
Hastelloy B-2 $150 21 Nickel molybdenum alloy

For any new design there are huge opportunities to:

  • Save cost
  • Increase corrosion life
  • Or make an expensive mistake!

For instance:

  • 304L is by far the most widely used stainless steel.  It is a great all-round alloy, very well understood, and in plentiful supply, but does it always offer the best price/performance?  No—there are often cost-saving alternatives, the exact one depending on the design situation
  • Some alloys offer similar corrosion resistance, but lower nickel content - nickel being responsible for much of the expense of stainless alloys, especially with recent price rises
  • Other alloys are more expensive per kg or lb, but cheaper overall due to greater strength (allowing less to be used) or greater corrosion life (allowing a longer lifetime, less downtime in service)

The Granta solution

The Stainless Alloys dataset within MaterialUniverse contains:

  • Over 300 alloy compositions and conditions
  • Stainless steels
    • Austenitic
    • Ferritic
    • Martensitic
    • Duplex
    • Precipitation hardened (PH)
  • Nickel alloys
    • Commercially pure
    • Alloys with Fe, Cr, Cu, Co, Mo, W, Be, etc