TY - RPRT TI - Standard Reference Materials A standard reference material containing nominally four percent austenite AU - Michaelis, R E AU - Yakowitz, H AU - Hicho, G E PY - 1971 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NBS SP 260-25 DO - 10.6028/NBS.SP.260-25 ER -