B654/B654M Standard Specification for Niobium-Hafnium Alloy Foil, Sheet, Strip, and Plate
B655/B655M Standard Specification for Niobium-Hafnium Alloy Bar and Wire
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E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E2626 Guide for Spectrometric Analysis of Reactive and Refractory Metals