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We present the results of two Beppo-SAX observations of the poor clustersSC1327-312 and SC1329-313. These objects are located in a huge structure,formed by three ACO clusters, which is probably the remnant of one of thelargest and best studied major mergings known. Given the fact that these poorclusters are in between two interacting ACO clusters, the aim of this work isto study the physics of the intracluster medium and to look for the possiblepresence of shocks.  We derived the gas distribution profiles, the global (i.e. within 0.3 Mpc)temperatures and abundances and the temperature profiles and maps forSC1327-312 and SC1329-313. Also the presence of soft excess in LECS and hardexcess in PDS have been checked.  We do not find evidence of regions where the gas is shocked or significantlyheated. The image of SC1327-312 seems rather symmetric, while the gas profileof SC1329-313 shows disturbed, comet-like shaped isophotes, with the tailpointing toward A3562 and a compression toward SC1327-312.  The presence of multiphase gas in SC1329-313, as claimed by Hanami et al.(1999) on ASCA data, has been found only at the 2 sigma confidence level.  The lack of heating supports the hypothesis that the merging is at a latestage, after the first core--core encounter, when the main shock front had thetime to travel to the external regions of the main clusters.Comment: 11 pages with encapsulated figure, A&A in pres

SC 1327–312 & SC 1329–313: Two galaxy groups in-between a major merging event observed with Beppo–SAX