Gloria Material Technology Corp. includes what steel grade that has a cubic austenitic structure?
Gloria Material Technology Corp. Gloria Material Technology Corp. (or GMTC) headquarter is located in Liuying industrial zone, Tainan City, Taiwan, and is the only specialty alloys professional manufacturer in Taiwan which owns Melting, Forging, Rolling, Heat treating and finishing process. GMTC provides more than 500 steel grades such as Superalloy, Titanium alloy, ESR & VAR steel, High speed steel, Stainless steel, quenched-tempered steel, Tool steel, special steel profile and precision parts machining. Main product shapes are focused on the round bars and square bars.
Beta ferrite Beta ferrite (β-Fe) and beta iron (β-iron) are obsolete terms for the paramagnetic form of alpha ferrite (α-Fe). The primary phase of low-carbon or mild steel and most cast irons at room temperature is ferromagnetic ferrite (α-Fe). As iron or ferritic steel is heated above the critical temperature A or Curie temperature of 771 °C (1044K or 1420 °F), the random thermal agitation of the atoms exceeds the oriented magnetic moment of the unpaired electron spins in the 3d shell. The A forms the low-temperature boundary of the beta iron field in the phase diagram in Figure 1. Beta ferrite is crystallographically identical to alpha ferrite, except for magnetic domains and the expanded body-centered cubic lattice parameter as a function of temperature, and is therefore of only minor importance in steel heat treating. For this reason, the beta "phase" is not usually considered a distinct phase but merely the high-temperature end of the alpha phase field. Similarly, the A is of only minor importance compared to the A (eutectoid), A and A critical temperatures. The A, where austenite is in equilibrium with cementite + γ-Fe, is beyond the right edge in Fig. 1. The α + γ phase field is, technically, the β + γ field above the A. The beta designation maintains continuity of the Greek-letter progression of phases in iron and steel: alpha ferrite (α-Fe), beta ferrite (β-Fe), austenite (γ-Fe), high-temperature delta ferrite (δ-Fe) and high-pressure hexaferrum (ε-Fe).