Corrosion Probe Body and element.

Dear All,

Currently i have 2 questions, I would need your help in this.

1) I am currently wondering if there are any effects on the corrosion reading of a corrosion probe ER tubular for a Low temp Carbon steel probe & element replace with UNS K03005 and what are the impacts.

2) I have did some research on this UNS K03005 material and it calls out equivalent as ASTM 536 Gr B and some is ASTM 53 GR B, i am confuse of the 2 different standards that was called out.

ASTM 536 Gr B - Link [url]http://www.american-marsh.com/epg/products/pdf/engineering/materialschart/materials.pdf[/url]
ASTM 53 GR B - page 2 Link [url]http://www.alspi.com/alloys.pdf[/url]

Thanks.:dispirited: