Much thanks for accepting this as an answer, crackedpot-ga,
Here is the breakdown of your specifications, DIN EN 10305-3 E195 +CR1.
"EN 10305-3" tolerances are referenced on page 6, on this document on the
website of the Helsinki, Finland based company, Ruukki.
http://www.ruukki.com/rr_web/rr_icc.nsf/(images)/Metform_Brochures_English/$File/Stainless_Tubes_ENG_lock.pdf?OpenElement
"Tolerances (in accordance with standard EN 10305-3 for precision tubes)
Outside diameter, D [mm]
20 <= D < 32 ±0.15mm
32 <= D < 44 ±0.20mm
44 <= D < 55 ±0.25mm
...
Wall thickness, T ±10% of nominal thickness
Length, L 0/+50mm
Straightness, 0.20% of total tube length
..."
There is also this reference, from the Czech company, ThyssenKrupp Ferrosta.
http://www.thyssenkrupp-ferrosta.cz/en-tubes.php
"2394 10305-3 Welded and sized precision steel tubes
...
Quality according to EN norm: E195 ..."
And another reference, this one from the German Thyssen Mannesmann Handel.
http://www.t-m-handel.de/engl/pdf/Tm.pdf
"Further Tube Categories DIN-Standard EN-Standard Grade-DIN Grade-EN
...
Welded cold sized [tube] Precision 2394 10305-3 St 34-2 BKM E195+CR1"
According to this chart on the "Tube & Pipe Logistics Trade" website ("one
of the best organized databases in the pipe & tube industry's logistics
worldwide"), "E195" steel is the same as US standard 1010 steel.
http://www.steeltubestrade.net/tech_standards.php
"Base steel ... E195 ... 2394 ... St 34-2 ... 1010"
This "Metal Suppliers Online" page has the properties of 1010 steel.
http://www.suppliersonline.com/research/property/metals/809.asp
"CS 1010 is a plain carbon steel with a nominal 0.10% carbon content. It
is a relatively low strength steel but it may be quenched and tempered for
increased strength."
Much thanks to the comment by Myoarin that fills in the last piece of the
puzzle, the +CR1 specification. From his comment, we have this reference
from the Germany based MHP Mannesmann Präzisrohr GmbH company website.
http://www.mhptubes.de/englisch/1-pics-tubes/1700_geschweisst-engl.pdf
Pages 6 and 7 of the above document gives us this:
"...
Table 4a: Mechanical properties at room temperature for ... +CR1
...
Steel grade Minimum values for the delivery condition(1)
+CR1(2,3)
...
Name Number Rm N/mm(2) A%
...
E195 1.0034 330 8
...
1) Rm: tensile strength; ReH: upper yield strength; A: elongation after
fracture.
2) Depending on the degree of cold forming the strip material and sizing
the as welded tube, the yield strength may nearly be as high as the tensile
strength. For calculation purposes yield strength values of ReH =0.7 Rm are
recommended in the +CR1 condition.
3) The mechanical properties and the technological properties of the weld
zone may, in the case of the delivery conditions +CR1 and +A, differ from
those of the base material.
...
Table 5: Technical delivery conditions
Designation Symbol Description
welded and cold sized +CR1 (BKM) Normally not heat treated, but
suitable for final annealing.
...
Tubing which has not been heat treated, +CR1, +CR2 (BKM) delivery conditions,
usually exhibits a process-related, adhering film of lubricant both internally
and externally. The removal of this film is subject to special agreement."
I suggest that you look at the referenced documents for the details in the
specifications.
If you need any clarification, please feel free to ask.
Search strategy:
Google search on: "DIN 2394"
://www.google.com/search?q=%22DIN+2394%22
Google search on: "EN 10305"
://www.google.com/search?q=%22EN+10305%22
Google search on: "St 34-2" OR "E195" tube
://www.google.com/search?q=%22St+34-2%22+OR+%22E195%22+tube
Google search on: E195 steel
://www.google.com/search?q=E195+steel
Google search on: SAE 1010
://www.google.com/search?q=sae+1010
Google Search on: "+CR1" steel
://www.google.com/search?q=%22%2BCR1%22+steel
Read and used the comment by Myoarin! Thanks!
Looking Forward, denco-ga - Google Answers Researcher |
