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We use new ASCA observations and archival ROSAT Position Sensitive Proportional Counter (PSPC) data to determine the X-ray spectral properties of the intracluster gas in Abell 644. From the overall spectrum, we determine the average gas temperature to be 8.64 (+0.67,-0.56) keV, and an abundance of 0.32 (+/-0.04) Z_. The global ASCA and ROSAT spectra imply a cooling rate of 214 (+100,-91) M_ yr^-1. The PSPC X-ray surface brightness profile and the ASCA data suggest a somewhat higher coolingdoi:10.1086/308354 fatcat:wtfdflktbvg4lpb3om7h6ugvyu