For example, for the recalibration of the US National Prototype Kilogram in 1985, two austenitic stainless steel artifacts were used for comparison. One, named D2, is similar to 18-8 (type 304) stainless (ie 18% Chromium, 8% Nickel); the other, named CH-1, is a more complex alloy that could be roughly designated as CrNiMo30-25-2 (chemical composition is 29.9% Cr, 25.1% Ni, 2.2% Mo, 1.45% Mn, 0.53 Si, 0.2% Cu, 0.07% C, 0.0019% P).Davis, R. N. (1985). "Recalibration of the US National Prototype Kilogram"(PDF). Journal of Research of the National Bureau of Standards. Washington: US Government Printing Office. 90 (4): 267. doi:10.6028/jres.090.015. Archived from the original(PDF) on 3 June 2011. Retrieved 2 May 2011.
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For example, for the recalibration of the US National Prototype Kilogram in 1985, two austenitic stainless steel artifacts were used for comparison. One, named D2, is similar to 18-8 (type 304) stainless (ie 18% Chromium, 8% Nickel); the other, named CH-1, is a more complex alloy that could be roughly designated as CrNiMo30-25-2 (chemical composition is 29.9% Cr, 25.1% Ni, 2.2% Mo, 1.45% Mn, 0.53 Si, 0.2% Cu, 0.07% C, 0.0019% P).Davis, R. N. (1985). "Recalibration of the US National Prototype Kilogram"(PDF). Journal of Research of the National Bureau of Standards. Washington: US Government Printing Office. 90 (4): 267. doi:10.6028/jres.090.015. Archived from the original(PDF) on 3 June 2011. Retrieved 2 May 2011.
For example, for the recalibration of the US National Prototype Kilogram in 1985, two austenitic stainless steel artifacts were used for comparison. One, named D2, is similar to 18-8 (type 304) stainless (ie 18% Chromium, 8% Nickel); the other, named CH-1, is a more complex alloy that could be roughly designated as CrNiMo30-25-2 (chemical composition is 29.9% Cr, 25.1% Ni, 2.2% Mo, 1.45% Mn, 0.53 Si, 0.2% Cu, 0.07% C, 0.0019% P).Davis, R. N. (1985). "Recalibration of the US National Prototype Kilogram"(PDF). Journal of Research of the National Bureau of Standards. Washington: US Government Printing Office. 90 (4): 267. doi:10.6028/jres.090.015. Archived from the original(PDF) on 3 June 2011. Retrieved 2 May 2011.
