AFNOR steel designation system explanation
AFNOR steel designation system explanation
(OP)
Can anyone explain, or does anyone have a good reference for explaining the AFNOR steel designation system?
I need something similar to the explanations for other designation systems as provided at:
http://www.slideshare.net/worldofsteel/steel-namin...
I need something similar to the explanations for other designation systems as provided at:
http://www.slideshare.net/worldofsteel/steel-namin...





RE: AFNOR steel designation system explanation
for example:
16NCD13 indicated a steel with 0.16% C and Ni (~3.25%) + Cr Mo (unspecified content)
Stainless grades were preceded by Z, and then the figure following the letters would indicate the percentage of the element (without division by 4)
However according to:
http://www.keytometals.com/page.aspx?ID=CheckArtic...
they seem to have opted for a serial number classification.
The old designation can still be found in comparison tables like the following:
http://www.grantadesign.com/resources/materials/de...
http://antongcorp.com/images/file/material-standar... (1st page)
http://www.starch.dk/isi/tables/steels.htm
http://www.metalravne.com/selector/html/steel_inde...
http://mdmetric.com/tech/InternationalMaterialGrad...
http://www.meusburger.com/media/files/Materialqual...
A comprehensive book is:
ASTM DS67C
Handbook of Comparative World Steel Standards (book for sale)
The index from the above can be downloaded from:
http://www.astm.org/DIGITAL_LIBRARY/MNL/SOURCE_PAG...
http://www.welding-advisers.com/
RE: AFNOR steel designation system explanation
MATERIAL DESIGNATION
1.4593
Country/Standard: Germany / DIN
Subgroup: DIN EN 10283 Corrosion resistant steel castings
Comment: Fully austenitic grade. Numerical designation 1.4557 is replacement of the numerical designation 1.4593 according to EN 10283:2010
Criteria Min. Max.
C None 0.025
Cr 19.5 20.5
Cu 0.5 1
Mn None 1.2
Mo 6 7
N 0.18 0.24
Ni 17.5 19.5
P None 0.03
S None 0.01
Si None 1
MATERIAL DESIGNATION
1.4468
Country/Standard: European Union / EN
Subgroup: EN 10283 Corrosion resistant steel castings
Comment: Fully austenitic grade
Criteria Min. Max.
C None 0.03
Cr 24.5 26.5
Mn None 2
Mo 2.5 3.5
N 0.12 0.25
Ni 5.5 7
P None 0.035
S None 0.025
Si None 1
RE: AFNOR steel designation system explanation
These are cast alloy designations.
C is corrosion resistant (low carbon)
D refers to the Cr eq vs Ni eq ratio. They are different fields on the chart, and D is duplex.
The 4 is 0.04% max C and 6 is 0.06% max C
In this case M is moly, Cu is copper and N is nitrogen.
Look at ASTM A995
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube