A242 (Type 1) Material?

By kkidd1 Date 06-03-2009 17:17

A242 at one time was listed in D1.1 as a prequalified base material, Group 2 I think. I don't see it listed now. Can some one help me out with this? I have a job that requires a242 (Type 1) HIGH STRENGTH SELF WEATHERING STEEL. Can some one help me with this.
Thanks.

By rickc

Date 06-03-2009 18:23

Yep, sometime between 1992 and 2000 it got dropped as a prequalified material. If you were to use it now you would have to run a coupon using it as an unlisted material

By kkidd1 Date 06-04-2009 10:51

Thanks Rickc. Do you know why they droped this material? I still have jobs out in the field that we used prequalified wps's on back in 1996 - 2000. I wonder what the problem was? It would be interesting to know why they changed this.
Thanks gain

By rickc

Date 06-04-2009 18:59

Not a clue. We were in a similar boat when they dropped A514.
FWIW, you're old procedures are still good under the current standard by 4.2.1 on Page 124 of D1.1:2008.