Studi pengaruh temperatur dan waktu pemansan proses anil cepat terhadap besar butir, mampu bentuk pelat, difraksi sinar X dan kekasaran pelat kuningan 70/30 = assessment of influence temperatur and heating time from rapid annealing process correlation to grain size, sheet formability, X ray diffraction, hardness and surface roughness from plate 70/30 brass