×
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

A-36 SemiKilled or Killed Material

A-36 SemiKilled or Killed Material

A-36 SemiKilled or Killed Material

(OP)
Need some help to try and prove that some 3/8" thk. A-36 plate is either SemiKilled or Killed.  It is foreign material and they do not say it on the MTR's.  The Domestic Mills usually put it on.  How can I prove that it's not rimmed or cup material and is either SemiKilled or Killed.  We have an inspector giving us a hard time.  Thanks

RE: A-36 SemiKilled or Killed Material

Contact the supplier, the mill rep, or the mill.  It's possible that all the steel they produce is killed or semikilled etc, in which case a letter to that effect should suffice.

RE: A-36 SemiKilled or Killed Material

I've been told by metallurgists that the MTR can be reviewed and that the amount of silicon or aluminum can also be a clue as to whether it was killed or semi-killed.  Sorry, but I do not recall the amounts required to achieve these conditions.

Joe Tank

RE: A-36 SemiKilled or Killed Material

For what it's worth:

The term “killed” indicates that the steel has been sufficiently  deoxidized to quiet the molten metal when poured into the ingot mold. The general practice is to use aluminum ferrosilicon or  manganese as deoxidizing agents. A properly  killed steel is more uniform as to analysis and is comparatively free from aging. However, for the same carbon and manganese content  Killed Steel is harder than  Rimmed Steel. In general all steels above 0.25% carbon are killed, also all forging grades, structural steels from 0.15% to 0.25% carbon and some special steels in the low carbon range. Most steels below 0.15% carbon are rimmed steel.

RE: A-36 SemiKilled or Killed Material

tgregg;
Remove a small section of the suspect steel and have a metallurgical lab perform a quantitative chemical analysis to show the Inspector that the steel is killed. The Si and Al contents should be reported in your analysis (provided the steel is indeed killed).

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