×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

CA6NM is a CRA material?

CA6NM is a CRA material?

CA6NM is a CRA material?

(OP)
CA6NM can be considered a Corrosion resistant material? In internet i found that is a CRA material but i'm not sure

RE: CA6NM is a CRA material?

CA6NM is classed as a corrosion resisting material. However, unlike CF8M or 316 stainless it will rust. The following should be useful in deciphering cast stainless steel grades. There is a diagram in ASTM A781 that helps with this. The C in the grade designation indicates that it is corrosion resisting, A indicates a martensitic structure, 6 indicates Carbon content of 0.06 max and the NM indicate special elements, in this case nickel and molybdenum. In terms of corrosion resistance it is similar to CA15 or 410 material.

RE: CA6NM is a CRA material?

Martensitic stainless steels with this level of chrome are barely over the required level to be called a "stainless steel". This has 13% chrome, whereas you must have over 10.5-11% to develop a passive chrome-oxide layer typical of stainless steel. If you are talking about being defined as "CRA", you must look at the definition (CRA definition is different in API 6A versus NACE MR0175 for example).

RE: CA6NM is a CRA material?

(OP)
My problem is that i don't find a material (60k) suitable for -125/+120 °C for API 6A valves class 10000

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources