Chemical composition of metals and alloys

Failures of mechanical systems are often due to material exchange or to compositions outside  specifications. So the check ot the alloy composition  is often required in ordre to master the subsequent processes.

Several years ago, Laboratoire Dubois acquired a spark spectrometer. Configured for the analysis of iron, aluminium, copper, nickel, cobalt, tin, lead and titanium alloys, this equipment can be used to quantitatively measure the amount of alloy elements as well as impurities.

Carbon, sulphur, phosphorus, nitrogen and boron are among the analysable elements. The advantage of this technique lies in the fact that there is no need previous dissolution of the alloy, thus enabling a rapid and cost-effective analysis.

1.4435 Lower limit % Measured % Upper limit %
Al 0.002
As 0.011
C 0 0.025 0.03
Co 0.110
Cr 17 17.500 19
Cu 0.230
Fe 64.700
Mn 0 1.450 2
Mo 2.5 2.720 3
Ni 12.5 12.600 15
P 0 0.031 0.045
S 0 0.001 0.03
Si 0 0.480 1
Sn 0.010
Ti 0.005
V 0.058

Chemical composition of a sample made of 1.4435 stainless steel. The alloy comply with the composition requirements.

We can undertake analyses of samples or wires from about 3 mm diameter on.

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