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Frequently Asked Questions

These are some of the questions that we frequently get asked.

  1. What Is Stainless Steel?
  2. When was stainless steel discovered?
  3. What is stainless steel used for?
  4. Does stainless steel corrode?
  5. What forms of corrosion can occur in stainless steels?
  6. How many types of stainless steel are there?
  7. What are the correct standards for stainless steel?
  8. Is stainless steel non-magnetic?
  9. Can I use stainless steel at low temperatures?
  10. Can I use stainless steel at high temperatures?
  11. What surface finishes are available on stainless steels?
  12. How do I choose which stainless steel to use?
  13. What is 'multiple certification'?

What are the correct standards for stainless steel?

The most common current European standards for stainless steel are:

Standard Number

Title

Relevant Technical Information

EN 10088-1

List of stainless steels

 

EN 10088-2

Technical delivery conditions for sheet/plate and strip for corrosion resisting steels for general purposes

Chemical Composition

Properties of Ferritic Steels

Properties of Martensitic Steels

Properties of Austenitic Steels

Properties of Duplex Steels

Properties of PH Steels

EN 10088-3

Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products for corrosion resisting steels for general purposes

All Products

Chemical Composition

Standard Products

Properties of Ferritic Steels

Properties of Martensitic Steels

Properties of Austenitic Steels

Properties of Duplex Steels

Properties of PH Steels

Bright Bars

Properties of Ferritic Steels

Properties of Martensitic Steels

Properties of Austenitic Steels

Properties of Duplex Steels

Properties of PH Steels

EN 10095

Heat resisting steels and nickel alloys

Chemical Composition

Ambient Temperature Properties

EN 10028-7

Flat products made of steels for pressure purposes – Stainless steels

Elevated Temperature Properties

EN 10296-2

Welded circular steel tubes for mechanical and general engineering purposes – Technical delivery conditions – Stainless steel

Chemical Composition

Mechanical Properties

Tolerances

EN 10297-2

Seamless circular steel tubes for mechanical and general engineering purposes – Technical delivery conditions – Stainless steel

Chemical Composition

Mechanical Properties

Tolerances

EN 10216-5

Seamless steel tubes for pressure purposes – Technical delivery conditions – Stainless steel tubes

 Chemical Composition

EN 10217-7

Welded steel tubes for pressure purposes – Technical delivery conditions – Stainless steel tubes

 Chemical Composition

Mechanical Properties

These standards have replaced the old national standards and users are encouraged to use them. However, it is clear that the old standards are still used, not least because many existing drawings and company specifications refer to them. Therefore, it is still possible to come across standards such as:

BS 1449 and BS1501 for flat products

BS 970 for long products

The US standards such as ASTM and ASME are very important and will never be replaced. Common standards are:

Standard Number

Title

Relevant Technical Information

ASTM A240

Chromium and chromium-nickel stainless steel plate, sheet and strip for pressure vessels

Chemical Composition Austenitic Steels

Chemical Composition Ferritic Steels

Chemical Composition  Martensitic Steels

Chemical Composition  Duplex Steels

Chemical Composition  PH Steels

ASTM A276

Standard Specification for Stainless Steel Bars and Shapes

Chemical Composition Austenitic Steels

Chemical Composition Ferritic Steels

Chemical Composition  Martensitic Steels

Chemical Composition  Duplex Steels

Chemical Composition  PH Steels

ASTM A312

Standard Specification for Seamless and Welded Austenitic Stainless Steel Pipes

Chemical Composition Austenitic Steels

Chemical Composition Ferritic Steels

Chemical Composition  Martensitic Steels

Chemical Composition  Duplex Steels

Chemical Composition  PH Steels

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