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Fisk
I'm going to have to concede here... It seems Noblex was producing stainless steel back in 1995
"The Noblex tubing is an Austenitic stainless steel made by Poppe & Potthoff in Germany to specification X5CrNi18-10. It is similar to AISI 304.
Chemistry
C Carbon max 0.07%
Si Silicon max 1.00%
Mn Manganese max 2.00%
P Phosphorus max 0.045%
S Sulphur max 0.015%
Cr Chromium 17.5-19.5%
Ni Nickel 8.0-10.5%
Mechanical Properties
Tensile Strength 1000 N/mm2 (1000 MPa)
Yield Strength 900 N/mm2 (900 MPa)
Elongation 10%