This standard is applicable to iron-based and nickel-based superalloy bars, slabs and transverse low-magnification microstructure tests of weld inspection samples.
GB/T 14999.2-1994 history
2012GB/T 14999.2-2012 Test methods for superalloys.Part 2:Verification of transverse macro-structures and defect by etch
1994GB/T 14999.2-1994 Methods of acid etch test for transvese macro-structures of heat-resisting superalloys