Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Stainless Steels - Identification Tests

Magnetic, spark, hardness and acid identification tests for austenitic, martensitic and ferritic stainless steels.

Stainless steels can be hard to identify. The different types can be distinguished by methods as

  • magnet testing
  • spark testing
  • hardness testing
  • acid testing

For full table with Sulfuric and Hydrochloric Acid Test - rotate the screen!

Stainless Steels - Identification Tests
AISI TypeGradeGroupMagnet TestSpark TestHardness TestSulfuric Acid TestHydrochloric Acid Test
302 Chromium-
Nickel
Austenitic Non-
Magnetic
Few forks - short, reddish >165 Brinell after heated to 1800oF and water quench Strong attack - green crystals and dark surface Rapid reaction - pale blue-green solution
303 Spoiled egg odor - heavy black smudge
303Se Garlic odor
304 Strong attack - green crystals and dark surface Fast attack - gas formation
308 Full red without many forks
309
310
316 Few forks - short, reddish Slow attack - tan surface turns brown Very slow attack
317
321 Fast attack - gas formation
347
410 Chromium Martensitic Magnetic Long white with few forks > 280 Brinell after heated to 1800oF and water quench Rapid reaction - dark green solution
414
416 Spoiled egg odor - heavy black smudge
416Se Garlic odor
420 Long white-red with burst
431 Long white with few forks
440 A, B, C Long white-red with burst
430 Ferritic Long white with few forks 180 - 250 Brinell after heated to 1800oF and water quench
430F Spoiled egg odor - heavy black smudge
430FSe Garlic odor
446 Full red without many forks

Related Topics

  • Corrosion

    Corrosion in piping systems caused by thermodynamic and electrochemical processes - corrosion problems and methods of protection and prevention.
  • Dimensions of Pipes and Tubes

    Pipe, tube and fittings sizes and dimensions. Inside and outside diameters, weights and more.
  • Material Properties

    Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.

Related Documents

Search

Search is the most efficient way to navigate the Engineering ToolBox.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

We use a third-party to provide monetization technologies for our site. You can review their privacy and cookie policy here.

You can change your privacy settings by clicking the following button: .

Citation

This page can be cited as

  • The Engineering ToolBox (2003). Stainless Steels - Identification Tests. [online] Available at: https://www.engineeringtoolbox.com/identification-stainless-steel-d_383.html [Accessed Day Month Year].

Modify the access date according your visit.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































11.4.12

.