Page 63 - PCMI Journal July 2018

Araz Ardehali Barani | Manager Development and Quality Precision Strip Zapp Precision Metals GmbH | DE | The Effect of Metallurgical Features on the Etching Performance of Stainless Steels and Iron Nickel Alloys
5/29/18
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PCMI 2018: The effect of metallurgical features on the etching performance of stainless steels and iron nickel alloys
Each grain is one crystal and the alloy composition determines the crystal structure for stainless steels
Influence of alloying elements on crystal structure of stainless steels
May 14, 2018 | Technology PRECISION STRIP | Araz Barani | Page 5
austenitic stainless steels
ferritic stainless steels
Crystal structure
face centred cubic
body centred cubic
Alloying elements
Cr, Ni, Mn, C, N
Cr, Mo, Si
Density
7.9 g/cm3
7.7 g/cm3
Elastic modulus
200 GPa
220 GPa
Formability
high
low
Thermal expansion (200-400°C)
11x 10-6/K
17 – 18 x 10-6/K
Thermal conductivity at 20°C
30 W/mK
15 W/mK
Ferromagnetism
no
yes
Issue 131
July 2018 PCMI Journal 62
2