Made from RY90-56 and thickness of 0.2-0.25mm perforated carbon steel sheet Have two types of double side of carbon steel and single side perforated metal sheet insertion An idea material of reinforced graphite gaskets: heat exchanger gaskets, engine heat gaskets Very popular, because of low price, without asbestos fiber Density: 2.2 ~ 2.5g/cm3 Loss on Ignition: 24 ~ 29% Compressibility: 25 ± 5% Recovery: ≥40% Tensile strength crosswise: ≥70 bar Thickness increase: Immersion: 3# oil, ≥30%; oil B:≥25%