ASTM A234 - Gr 4130

[sw23cyp]

There are companies advertising fittings as A234 - Gr 4130. It doesn't appear that any of the A234 grades listed in table 1, of the ASTM specification, have the chemical composition range to allow 4130. How are they doing this?

 

[metengr]

Which companies? Foreign? There are fittings supplied as 4130 with no reference to A 234.

 

[EdStainless]

Other than by not following the rules?
In some spec systems (SAE) people often take exceptions.
Under the rules of ASTM you cannot identify a material or product as meeting a spec unless it meets all of the requirements, no exception allowed. Occasionally you see something marked as "ex" but it is a tighter or additional requirement

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P.E. Metallurgy, Plymouth Tube

 

[sw23cyp]

metengr,

Yes, the companies are based in the UK. I've attached a screenshot from one of their specification pages.

EdStainless,

That is what I thought. Section 5 of the ASTM A234 specification doesn't appear to allow for variance outside of the values listed in Table 1.

Thank you both for your input.