Posted by: novembri yusuf | April 21, 2008

AUSTENITIC SS KOQ SUSAH DI UT ….? ONO OPO…

Austenitic stainless steel

Austenitic stainless steels typically have a composition within the range 16-26% chromium (Cr) and 8-22% nickel (Ni). A commonly used alloy for welded fabrications is Type 304 which contains approximately 18%Cr and 10%Ni. These alloys can be readily welded using any of the arc welding processes (TIG, MIG, MMA and SA). As they are non-hardenable on cooling, they exhibit good toughness and there is no need for pre- or post-weld heat treatment.

Pada kenyataannya memang  baja SS austenitik susah untuk dilakukan UT. Hal ini disebakan oleh Ultrasonic Beam mengalami banya perturbation atau gangguan seperti ; deviasi beam, partitian, distorsi, dan kadang kadang echo yang menipu. Hal ini diakibatkan oleh phase dari austenitic itu sendiri. Anisotropi dan heterogen phase secara metallurgi sturktural yang terjadi dalam deposit las.

Jalan keluarnya : Mungkin bia dicoba menggunanakan tranducer dengan frekwensi lebih tinggi atau diameter lebih kecil. kalau ini nggak bisa juga ya … Bisa digunakan alternatif NDT lain seperti RT.

 


Responses

  1. Hi! I was surfing and found your blog post… nice! I love your blog. 🙂 Cheers! Sandra. R.

    • Hi Sandra in Huelva , Spain.

      Thank you please we wait your contribution in my blog…welcomes


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Categories

%d bloggers like this: