EN10025 terms 1

[deco0404]

Hi guys,

Im doing a couple of jobs at the moment using some strange steel designations that I am not entirely familiar with....

Does anyone have or know where to get a full list of designations for EN Steels.ie, exactly what each designation means!

I am talking specifically about the prefix letters

J - specific impact values
N- Normalised
Q- Quenched
T- Tempered
etc............

On a more urgent note, if someone could tell me what the 'D' in S355D is. We think it is hot-dip coated....

Thanks,

Declan

 

[SJones]

The prefix letter for EN 10025 will be S for structural. The suffix designations are described in EN 10027-1, where D is identified as 'hot dip coating.'

'Q' is quenched and tempered; 'T' is tubes. J requires a number for test temperature, otherwise R for room temperature.

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

 

[deco0404]

Thanks Steve, just found a copy of 10027, I was just wondering if there is some form of guide out there which covers the designations for structural, piping and other steel forms

Declan

 

[Gem1]

I agree and there are lots of reliable websites that will give you the grade prefixes, etc, if you can't get a copy of the standards.

We have noticed an increase in requests to use EN steels of late (we're in Australia and we write AS steels into our fabrication specifications). Many of these steels appear to be coming out of Western Europe. The EN grade specification aren't the issue in my opinion, it is more the quality control and documentation reliability that worry us.

It is along the lines with the increase in requests to use Chinese steel that we saw about 4 years ago. These days you can get good quality Chinese steel, if you are careful, but it took some time for this to become commonplace.

Has anyone had long term experience with the Western European EN structural steels?