metal standard and specification.pdfVIP

Iron Material containing the element iron as the principal constituent 1) materials with high carbon content C = 2 - 7 % e.g. Pig iron and cast iron 2) products consisting of technically pure iron C 0.02 % e.g. Electrolytic iron and iron powder Steel produced by melting process with element iron as Main Constituent: Carbon = 0.02 % - 2.14 % Main elements : Fe, C, Mn, Si, P, S Metal Material Characteristics ? Physical properties: Density, Melting points, Thermal conductivity, Electricity conductivity, Magnetic etc. ? Common Mechanics properties ： Strength、Plasticity、Hardness、Toughness and Fatigue ? Main chemical composition Fe, C, Si, P, S, Mn, Al Iron-Carbon Chart Strength and Plasticity Strength: the capability of metal against the permanent deformation and rupture. Plasticity δS: the capability on non reversible deformation before rupture. Yield point σ0.2 : In process, the metal materials start to yield, more plastic deforming under same stress – it is yield point. There are high yield point and low yield point. Re (ReH and ReL)，Unit: N/mm2. Re = Fe/S0 1） 1N/mm2 = 1Mpa 2） S0: Original section of testing samples Yield strength test Tension curves Tension strengthσb The stress relate to the maximum tension load（Fm) Rm，Unit: N/mm2。 Rm = Fm/S0 Remarks 1）1N/mm2 = 1Mpa 2） S0: Original area of section on the specimens Testing methods for hardness HRC HV HB MDS 材质证明书 Some common Standards China： Q195，Q215A、B，Q235A、B、C、D，Q255A、B，Q275 Some common Standards (Cont’) GB Chinese Standards (China) JIS Japanese Standards (Japan) EN European standards Note: JIS standard been used Japanese, KOREA and South east Asia market. Technical Description (Example) Example 01: “ Frame Base material Steel, welded round tubes DIN 2394, slit coil EN 10130, Fe P01 Am” ? Steel