beware asian material

[dyn88]

On friday I recieved a job for some formed brackets. Seemed easy enough, no material spec sheets needed, only a pes10 designation(1018 cold rolled) applied. So I grabbed some 1/4x4, 1/4x8, and some 1/4x2 1/2. All pieces needed 90 degree 1/4 inside radius bends. I made the dies and started to bend, the 4" wide material first(went just fine), 6 pieces 12 bends. Then I started the 8" wide material and BANG the thing tore and broke! thinking I grabbed something other than cold drawn I went to material controll and checked the cert on the bar. It read 1018 cold drawn 8 percent deviant. That was typical for all the material. I thought maybe My dies were to tight so I wacked of a piece of 10" and took it over to the brake and wala a perfect bend. Hmmm I then bent my 21/2 and went well. I called our steel yard and asked them what couldve happened, what i got for an answer was rather upsetting. It seems that overseas has a different material designation process and what I may have recieved was a piece of just colled drawn bar(could be 1018 could be 1040 for example). Well now I know why most of my customers reguire material certs for every piece we use and will not accept a job unless we supply them with one. Has anybody else experienced a problem like this before or am I the only lucky one?

[wb5jhy]

dyn88,

Years ago when I worked at an alumina plant we got a bad load of structural steel. There was a stick of 6" wide flange that had a long crack at the junction of one of the flanges and the web. This was new steel...just unloaded!

Kinda makes one leary about walking under all those pipe racks in the plant. :eek:


tjj

[GTA/SPEC]

Dont judge all asian material by this issue. We use alot of Kobe stainless tube, in my mind it is the best in the world. Kobe also happens to be the leading manufacturer of flux cored stainless. Nobody can touch Kobes quality.

[storts]

On friday I recieved a job for some formed brackets. Seemed easy enough, no material spec sheets needed, only a pes10 designation(1018 cold rolled) applied. So I grabbed some 1/4x4, 1/4x8, and some 1/4x2 1/2. All pieces needed 90 degree 1/4 inside radius bends. I made the dies and started to bend, the 4" wide material first(went just fine), 6 pieces 12 bends. Then I started the 8" wide material and BANG the thing tore and broke! thinking I grabbed something other than cold drawn I went to material controll and checked the cert on the bar. It read 1018 cold drawn 8 percent deviant. That was typical for all the material. I thought maybe My dies were to tight so I wacked of a piece of 10" and took it over to the brake and wala a perfect bend. Hmmm I then bent my 21/2 and went well. I called our steel yard and asked them what couldve happened, what i got for an answer was rather upsetting. It seems that overseas has a different material designation process and what I may have recieved was a piece of just colled drawn bar(could be 1018 could be 1040 for example). Well now I know why most of my customers reguire material certs for every piece we use and will not accept a job unless we supply them with one. Has anybody else experienced a problem like this before or am I the only lucky one?
Dyn; Could it had come from our famous supplier C&B's ,,Ive had it and the grain ran accross instead of lenght of bar? Its happened to me a few times,not to many,Jack