IARM Ni718P-18 – Nickel Alloy 718, UNS N07718

APPLICATION NOTE

IARM Ni718P-18 – Nickel Alloy 718, UNS N07718

SUMMARY

The application note summarizes the digestion of IARM Ni718P-18, a Nickel Alloy 718 Certified Reference Material using ColdBlock™ Digestion Pro Series Technology.

Instrument:	ColdBlock CBM sample digester, chiller, HF inserts, ICP-OES
Published:	March 2026
Digestion Time:	20 Minutes
Acid Used:	HNO₃, HF
Average ColdBlock Recovery vs. CRM:	102% Iron 99% Nickel 102% Niobium

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METHODOLOGY

The chiller temperature was set to -5 °C.
Approximately 0.500 g of each sample was accurately weighed and transferred into a ColdBlock digestion vessel.
A reagent mixture of 20mL of 1:1 HNO₃+ 3mL HF was added to each vessel
Samples were digested at 100 % power for 5 minutes, followed by 50% power for 15 minutes.
Digestates were allowed to cool, then quantitatively diluted to a final volume of 50mL using a solution of 2 % HNO₃ _v/v.

DISCUSSION

An optional addition of boric acid (20mL of 4% _v/v H₃BO₃) can be used to complex residual fluoride ions, which stabilizes the solution and enables safe analysis on sample introduction systems that are not equipped with inert HF kits.

Results

IARM Ni718P-18 – Additive Manufacturing Powder
Method:	0.5g	20mL 1:1 HNO₃+ 3mL HF – 100% for 5 minutes, then 50% for 15 minutes
Element	Certified Value (wt.%)	+/-	Sample A	Sample B	Sample C	Average (ppm)	Stdev	RSD	Recovery
Al	0.49	0.02	0.49	0.50	0.49	0.49	0.01	1.3%	101%
Co	0.097	0.006	0.094	0.097	0.096	0.10	0.001	1.3%	99%
Cr	19.6	0.2	19.7	20.0	20.0	19.9	0.2	0.8%	102%
Cu	0.018	0.004	0.020	0.020	0.018	0.019	0.001	5.8%	106%
Fe	17.0	0.3	17.2	17.4	17.2	17.3	0.1	0.4%	102%
Mn	0.026	0.002	0.026	0.026	0.026	0.026	0.0003	1.0%	100%
Mo	3.13	0.04	3.16	3.19	3.18	3.18	0.01	0.4%	101%
Nb	4.95	0.08	5.01	5.05	5.04	5.04	0.02	0.3%	102%
Ni	53.6	0.3	52.8	53.3	53.6	53.2	0.4	0.7%	99%
Si	0.036	0.009	0.038	0.048	0.030	0.039	0.008	19.5%	107%
Ta	0.006	0.005	0.006	0.006	0.006	0.006	0.0002	2.9%	96%
Ti	1.01	0.01	1.00	1.01	1.01	1.01	0.005	0.5%	100%
V	0.017	0.003	0.016	0.016	0.018	0.017	0.001	4.9%	98%
W	0.010	0.005	0.010	0.010	0.010	0.010	0.0002	2.5%	101%

IARM Ni718P-18; Additive Manufacturing Powder, Nickel Alloy718/UNS N07718; Analytical Reference Materials International; Manchester, NH 03103 (Oct 2018)
LGC Standards (ARMI MBH). (2026). IARM Ni718P-18 Additive Manufacturing Powder, Nickel Alloy 718 (UNS N07718) Certified Reference Material, Certificate of Analysis, United States.

Click here to download the Application Note in PDF format.

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