CR4 and EN 43 A... how different are they?

[Elastomatt]

Hi,

I am seeking a bit of advice regarding steel (and the different names/references that are used). I have a supplier offering me a component in CR4, but my customer wants EN 43 A..... are these materials the same?

I have had a Google-hunt but didn't help make the picture any clearer for me... apologies if there are similar posts elsewhere.

Thanks

Elastomatt

 

[DefenderJ]

Hi Elastomatt.

In simple terms they are not that similar when you look at composition, mechanical properties etc.
Grade 43A is an old designation - it is most likely to be EN 10025 S275JR, it is hot rolled, general purpose, weldable steel of 275MPa min yield
The CR4 is a cold rolled steel with high elongation and lower carbon content as is not specified by strength, but is weaker. It is good for cold forming.
I am not that knowledgeable about CR4 but I think it is covered by ISO 3574.

Hope this helps.

 

[metengr]

It looks like CR4 falls under a British Standard, BS 1449. This material is a cold rolled, low carbon steel (max 0.12% by mass). Not an equivalent to EN 43A.

 

[Elastomatt]

Thanks Guys, that has clarified things a bit for me.....guess I need to have words with my supplier!!

Elastomatt